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Measuring, testing, or monitoring of transmitter

Subclass of:

455 - Telecommunications

455091000 - TRANSMITTER

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Class / Patent application numberDescriptionNumber of patent applications / Date published
455115100 Measuring, testing, or monitoring of transmitter 88
20110195679IC COMPONENT BENCHMARKING WITHOUT EXTERNAL REFERENCES - Resistors and capacitors of an integrated circuit (IC) are calibrated without an external reference resistor. The IC includes a tunable circuit element and a benchmarking circuit. The benchmarking circuit includes a target component and an internal reference component. The internal reference component exhibits a lower sensitivity to changes in test conditions than the target component. The benchmarking circuit is useable to measure benchmarking metric values associated with the internal reference and the target. In one example, a first benchmarking metric value is measured while an internal reference component participates in the circuit and a second benchmarking metric value is measured while a target component participates in the circuit. A benchmark value is calculated based on the measured values and systemic, parasitic errors of the benchmarking circuit are canceled. The benchmark value is used to calculate a new tuning code of the tunable circuit element present on the IC.08-11-2011
20100041353Techniques for Calibrating a Transceiver of a Communication Device - A technique for calibrating a transceiver of a wireless communication device includes selectively coupling an output node of a transmitter of the transceiver to an input node of a receiver of the transceiver. A calibration signal is provided, from the output node of the transmitter, to the input node of the receiver. The calibration signal is down-converted, with the receiver, to provide a down-converted calibration signal. A discrete Fourier transform is performed on the down-converted calibration signal. Finally, one or more correction factors are determined based on an analysis of the discrete Fourier transform of the down-converted calibration signal. At least one of the correction factors is utilized to facilitate substantial cancellation of a direct current offset associated with the transceiver.02-18-2010
20130052972SIGNAL PROCESSING DEVICE AND METHOD FOR PROVIDING A FIRST ANALOG SIGNAL AND A SECOND ANALOG SIGNAL - A signal processing device for providing first and second analog signals includes first and second clocked digital signal path circuits and a transit time difference measuring device. The first clocked digital signal path circuit is configured to yield first digital data for providing a first analog signal. The second clocked digital signal path circuit is configured to yield second digital data for providing the second analog signal. The transit time difference measuring device is configured to yield a transit time difference measuring signal describing a difference between a signal transit time along a first measuring path and a signal transit time along a second measuring path, with the first measuring path including a first clock supply allocated to the first clocked digital signal path circuit, and with the second measuring path including a second clock supply allocated to the second clocked digital signal path circuit.02-28-2013
20090093222CALIBRATION AND BEAMFORMING IN A WIRELESS COMMUNICATION SYSTEM - Techniques for performing calibration and beamforming in a wireless communication system are described. In an aspect, a Node B may periodically perform calibration in each calibration interval with a set of UEs to obtain a calibration vector for the Node B. The Node B may apply the calibration vector to account for mismatches in the responses of the transmit and receive chains at the Node B. In another aspect, the Node B may perform beamforming to a UE by taking into account gain imbalance for multiple antennas at the UE. The Node B may determine a precoding matrix for beamforming by taking into account gain imbalance due to (i) different automatic gain control (AGC) gains for receive chains at the UE, (ii) different power amplifier (PA) gains for transmit chains at the UE, and/or (iii) different antenna gains for multiple antennas at the UE.04-09-2009
20130065545IMMERSIBLE UHF ANTENNA WITH LOW POWER AUTO TUNING SYSTEM - An antenna is provided having a good matching characteristics when immersed in a fluid such as saline water, oil, or other liquids (“the phantom liquid”). In some embodiments, the antenna provides a tight capacitive coupling with the phantom liquid through the use of a higher permeability cover and absence of a gap between the cover and the antenna body. One embodiment employs a tunably capacitively loaded inverted “F” antenna structure. Additional embodiments of the invention provide an antenna tuning system that saves power by utilizing very low duty cycle periodical refreshing charge at a tuning varactor diode coupled to the antenna.03-14-2013
20110045788CALIBRATION OF COMMUNICATION APPARATUS - A communication apparatus (02-24-2011
20090233562Systems and Methods for Transmitter Calibration - Systems and methods may be provided for transmitter calibration. The systems and methods may include providing one or more radio frequency (RF) test signals at an output of a transmitter, wherein the one or more RF test signals are based upon IQ baseband test signals, and applying an envelope detector to the one or more test signals to obtain one or more characteristic signals from the one or more RF test signals, where the one or more characteristic signals includes one or more first harmonic components and one or more second harmonic components associated with the one or more RF test signals. The systems and methods may further include analyzing the one or more second harmonic components to determine one or more IQ mismatch compensation parameters, and analyzing the one or more first harmonic components to determine one or more carrier leakage or DC offset compensation parameters.09-17-2009
20110143698DIRECTIONAL PATTERN DETERMINING METHOD CAPABLE OF QUICKLY SELECTING OPTIMUM DIRECTIONAL PATTERN - A plurality of directional patterns are classified into groups and stored in a directional pattern memory, such that among the plurality of directional patterns, the directional patterns strongly correlated with each other are classified into the same group, while the directional patterns weakly correlated with each other are classified into the different groups. One directional pattern is selected from each group in the directional pattern memory. One directional pattern is determined from the selected directional patterns, in accordance with a communication quality of signals each received when each one of the selected directional patterns is set for steerable antenna element. The determined directional pattern is set for the steerable antenna element.06-16-2011
20120003946ADAPTIVE ARRAY ANTENNA AND WIRELESS COMMUNICATION APPARATUS INCLUDING ADAPTIVE ARRAY ANTENNA - To provide an adaptive array antenna capable of increasing resolution of a variable beam direction of the antenna without increasing a calculation amount in arithmetic processing unit for optimally controlling a variable phase shifter. A parasitic element-equipped adaptive array antenna (01-05-2012
20120238225TRANSMISSION DEVICE - A transmission device, includes an amplifying unit which amplifies and outputs a modulation signal, a detecting unit which detects an output power of the amplifying unit, an output power changing unit which changes the output power of the amplifying unit based on an output of the detecting unit, and a control unit which controls an input impedance of the detecting unit based on each communication method.09-20-2012
20100048151COMMUNICATION DEVICE AND TRANSMISSION CONTROL METHOD - A communication device, e.g. a transmitter, that constitutes a multicarrier wireless transmission system and communicates with another communication device, e.g. a receiver, including a function of measuring an interference-plus-noise power by using a null symbol inserted into a received data, includes a null-symbol inserting unit that arranges a predetermined number of null symbols in a data-symbol storing region of a data frame to be transmitted to the receiver to generate a data frame including the null symbols, thereby realizing measuring an interference power in a data transmission section with high accuracy.02-25-2010
20080214129AUTOMATED NOISE MEASUREMENT SYSTEM - A noise test measurement system configured to measure a noise component of a transmitted RF signal is described. The noise test measurement system may include an antenna, a low-noise amplifier, a local oscillator, a first coupler, a first variable phase-shifter, a first mixer, and a processor.09-04-2008
20100248659WIRELESS COMMUNICATION DEVICE AND DIRECTIONAL ANTENNA CONTROL METHOD - A wireless communication device includes a directional antenna that transmits radio signals, and an antenna control unit that measures, in a plurality of directions, spatial lengths from the wireless communication device to an object nearest the wireless communication device, and directs a directional antenna beam radiation direction toward a direction having the longest of the measured spatial lengths, when transmitting the radio signals.09-30-2010
20090088094TRANSMITTER CAPABLE OF REDUCING LOCAL OSCILLATION LEAKAGE AND IN-PHASE/QUADRATURE-PHASE (I/Q) MISMATCH AND ADJUSTING METHODS THEREOF - An adjusting method for reducing local oscillation leakage or I/Q mismatch in a transmitter includes the steps of: (a) detecting a current extent of local oscillation leakage or I/Q mismatch; (b) determining if an adjusting direction is correct with reference to the current extent of local oscillation leakage or I/Q mismatch thus detected, maintaining the adjusting direction if correct, and reversing the adjusting direction upon determining that the adjusting direction is incorrect; and (c) adjusting a control signal according to the adjusting direction.04-02-2009
20090170451POWER CONTROL IN TELECOMMUNICATIONS NETWORKS - A method for controlling a radio frequency (RF) transmitter, the method having an integrating controller to produce a reference value of a first quality measure from a first error signal; producing an estimated value of the first quality measure relating to an actual value of the first quality measure; and supplying a tracking signal related to the estimated value of the first quality measure and the reference value of a first quality measure to the reference integrating controller.07-02-2009
20090286495PARALLEL AMPLIFIER ARCHITECTURE WITH FEEDBACK CONTROL BASED ON REFLECTED SIGNAL STRENGTH - Two input signals are amplified and combined into an output signal by first and second amplification stages and a combiner element. The first amplification stage includes a first signal modification unit and a first amplifier which receives a first input signal and provides a first intermediate signal. The second amplification stage includes at least a second amplifier which receives a second input signal and provides a second intermediate signal. The combiner element combines the first and the second intermediate signals and produces the output signal. In addition, a sensor senses a reflected signal on a signal line connecting the first amplifier and the combiner element and a feedback loop extends between the sensor and the signal modification unit. The signal modification unit is adapted to modify the first input signal depending on a measurement signal output by the first sensor.11-19-2009
20090291651Gain Temperature Compensation Circuit - A gain temperature compensation circuit producing a relatively small loss of power, and enabling modification of a variation width of the attenuation amount in a predetermined temperature range is provided. A gain temperature compensation circuit includes a circulator and a thermistor. The circulator outputs a signal being input to a first port to a second port, and outputs the signal being input to the second port to a third port. The thermistor being connected to the second port reflects the signal being output from the second port by varying the power of the signal according to temperature, so as to input to the second port, in order to adjust the attenuation amount of the signal.11-26-2009
20080305754Systems and methods for over-the-air testing of wireless systems - Embodiments include systems and methods for over-the-air testing of wireless systems. Embodiments comprise separated anechoic chambers containing wireless devices. The anechoic chambers are connected by propagation path corridors.12-11-2008
20080311864Determining the Current Value of Transmission Power of a Radio Telecommunication Device - A radio telecommunication device able to determine the current value of the transmission power comprises: a capturing unit to measure at least one operating condition of an amplifier influencing the value of the transmission power corresponding to a given gain setting value, and a determining module (12-18-2008
20110207419METHOD AND APPARATUS FOR DETERMINING TRANSMIT POWER - A method and an apparatus for determining transmit power are disclosed. The method includes: determining an E-DPDCH gain factor in compressed mode according to the number of E-DPDCH required for initial transmission of data; and determining transmit power of E-DPDCH according to the E-DPDCH gain factor in compressed mode. The E-DPDCH gain factor in compressed mode is determined according to the number of E-DPDCH required for initial transmission of data, and therefore, the E-DPDCH gain factor in compressed mode is determined accurately, the transmit power of E-DPDCH is determined accurately according to the E-DPDCH gain factor, the waste of transmit power of E-DPDCH is reduced, and therefore the system capacity is improved.08-25-2011
20090163155METHODS FOR CALIBRATING A TRANSMITTER, AND RADIO TRANSMITTER - In an embodiment, a radio transmitter may be provided. The radio transmitter may include a radio transmitter control loop; and a controller configured in such a way that it operates the radio transmitter control loop as a closed control loop in a first operating mode, and that it operates the radio transmitter control loop as an open control loop in a second operating mode.06-25-2009
20090186586TRANSMISSION CIRCUIT FOR RADIO FREQUENCY SIGNALS AND METHOD FOR TRANSMITTING RADIO FREQUENCY SIGNALS - A transmission circuit for radio frequency signals has a power mixer and includes a radio frequency input port, a first radio frequency output port, a second radio frequency output port, and a dummy load port. The transmission circuit also has a first switch unit and a second switch unit. The first switch unit is connected to the first radio frequency output port and outputs the radio frequency signals which are emitted from the first radio frequency output port or reflects the radio frequency signals which are emitted from the first radio frequency output port back to the first radio frequency output port. The second switch unit is connected to the second radio frequency output port and outputs the radio frequency signals which are emitted from the second radio frequency output port, or reflects the radio frequency signals which are emitted from the second radio frequency output port back to the second radio frequency output port. The radio frequency signals reflected to the radio frequency input port by the first switch unit and the radio frequency signals reflected to said radio frequency input port by the second switch unit cancel each other. The transmission circuit has reduced complexity and cost.07-23-2009
20090023405RF Front-End Circuitry with Reduced DC Offset - An RF front-end circuit includes a directional coupler, a mixer, and a reflection circuit. The directional coupler is adapted to receive an antenna signal and an oscillator signal. The mixer is coupled to the directional coupler to receive the antenna signal and is further adapted to receive a mixer signal and to generate an output signal related to the antenna signal and the mixer signal. The reflection circuit is coupled to the directional coupler to receive the oscillator signal and is adapted to reflect at least a portion of the oscillator signal to the mixer via the directional coupler to counteract a parasitic portion of the oscillator signal received at the mixer.01-22-2009
20090047916TRANSMIT POWER CONTROL TECHNIQUES FOR WIRELESS COMMUNICATION SYSTEMS - Methods and systems of controlling transmit power in a multi-user wireless communication system is provided, A transmit power, level for a transmitter is determined according to an algorithm based in communication theory, such as an iterative water-filling procedure, which takes into account an assumption of transmit behaviours of transmitters in the communication system, Actual transmit behaviours of transmitters in the communication system are monitored using a learning algorithm to determine whether any transmitters exhibit transmit behaviours which are not consistent with the assumption.02-19-2009
20110059706SYSTEM AND METHOD FOR ADAPTIVE BEAMFORMING FOR SPECIFIC ABSORPTION RATE CONTROL - A system may include a modifiable mobile device having at least two antennas coupled to fractional amplifiers, with returned power detectors. A beamformer unit provides adaptive beam shaping pattern, and a baseband processor provides beam pattern requirements, wherein the beamformer unit modifies the beam pattern requirements with return loss sampling information to shape the adaptive beam pattern so that a transmitted beam pattern minimizes transmitted power reflected back to the mobile device. A method may include regularly measuring a return power level, if output power is greater than a specific absorption rate level, comparing the return power level to a first threshold, else implementing mobile transmit diversity (MTD), and repeating. If the return power level is greater than the first threshold, implementing a MTD combined with reflection-based beamforming that modifies beam pattern requirements of the mobile device with return loss sampling information to create an adaptive beam pattern.03-10-2011
20120142290APPARATUS AND METHOD FOR DETECTING EFFECTIVE RADIATED POWER - Provided is an apparatus and method for measuring effective radiated power. The apparatus includes a reference signal power measuring unit configured to measure power of a reference signal from a wireless signal transmitted from a wireless device, and an effective radiated power calculating unit configured to calculate effective radiated power according to an allocation ratio of a reference signal in an entire signal domain using the measured reference signal power from the reference signal power measuring unit.06-07-2012
20100197250APPARATUS AND METHOD FOR DC OFFSET CALIBRATION IN SYSTEM - An apparatus and method for DC offset calibration in a system are provided. The method of a DC offset calibrator for calibrating a DC offset on a system transmission path includes variably setting offset values to be applied to transmit signals of a system, transmitting the variably set offset values to the system, measuring a DC component output value at an antenna end of the system for the transmit signals to which the variably set offset values are applied, and, when the measured DC component output value has a value allowable in the system, determining the variably set offset values as final offset values to be applied to the system.08-05-2010
20110117865METHOD FOR CALIBRATING A TRANSMISSION LINE, AND CORRESPONDING COMPUTER SOFTWARE PRODUCT, STORAGE MEDIUM AND CALIBRATION DEVICE - A method and apparatus are provided for calibrating an information-signal transmission line that includes elements for generating a control signal and transmitting information signals controlled by the control signals, and an amplifier of the information signals. The amplifier can be configured according to at least a first gain configuration associated with a first gain value, and a second gain configuration associated with a second gain value. The method includes obtaining, for each of the first and second gain configurations, first and second sets of initial values of the control signal, that correspond to first and second sets of measured power that overlap, and selecting, for each power-recovery setpoint value to which corresponds a first measured-power value of the first set and a second measured-power value of the second set, from the first and second calibrated values of the control signal, the calibrated value that meets a predetermined criterion.05-19-2011
20100304695Transmitter Phase Shift Determination and Compensation - A wireless communication transmitter is configured to determine transmitter phase shift, and correspondingly includes a derivation circuit, one or more slope polarity tracking circuits, and a phase shift computation circuit. The derivation circuit derives a reference signal from a signal input to the transmitter and a feedback signal from the transmit signal corresponding to that input signal. So derived, differences in the reference and feedback signals reveal the effect the transmitter has on the transmit signal. Accordingly, the transmitter focuses on differences in the polarities of the reference signal's slope and the feedback signal's slope to determine the effect the transmitter has on the phase of the transmit signal. That is, the slope polarity tracking circuits track the slope polarities of the reference and feedback signals, while the phase shift computation circuit computes the transmitter phase shift as a function of differences in those tracked slope polarities.12-02-2010
20110014885UPDATING CHANNEL ESTIMATES - MIMO OFDM receiver which periodically forms a channel estimate and compares: a: an estimate of the capacity of the channel if the transmitter were to make use of the receiver's channel estimate (closed loop) with b: an estimate of the capacity of the channel if the transmitter were to make no use of channel estimate (open loop), and send data on the channel estimate to the transmitter only when (b−a)>k, where k is a pre-set threshold.01-20-2011
20100136932METHOD AND A RADIO BASE STATION IN A TELECOMMUNICATIONS SYSTEM - The present invention relates to radio base stations including a standardized interface CPRI between a Radio Equipment (RE) and a Radio Equipment Controller (REC). The present invention also relates to a method. The problem addressed is how to convey calibration information from the RE to the REC, when the capacity is occupied by radio IQ samples. The solution is to suppress the IQ samples to get capacity for the calibration information. Various embodiments of the invention focus on reducing the negative impact the suppression of IQ data may have on detecting the signals received.06-03-2010
20110086599TRANSMITTER CONTROL - Various embodiments are disclosed relating to techniques of controlling a transmitter. In accordance with an example embodiment of the present invention, a maximum level of signal distortion acceptable for a transmission from a transmitter may be determined based on information of operating characteristics of the transmitter and/or the environment in which the transmission is to be made.04-14-2011
20110086598DYNAMIC REAL-TIME CALIBRATION FOR ANTENNA MATCHING IN A RADIO FREQUENCY RECEIVER SYSTEM - Real-time calibration of a tunable matching network that matches the dynamic impedance of an antenna in a radio frequency receiver system. The radio frequency receiver system includes two non-linear equations that may be solved to determine the reflection coefficient of the antenna. The tunable matching network is repeatedly perturbed and the power received by the antenna is measured after each perturbation at the same node in the matching network. The measured power values are used by an optimizer in converging to a solution that provides the reflection coefficient of the antenna. The reflection coefficient of the antenna may be used to determine the input impedance of the antenna. The elements of the matching circuit are then adjusted to match the input impedance of the antenna.04-14-2011
20100056083RADIO FREQUENCY CALIBRATION APPARATUS AND METHOD FOR MULTI-ANTENNA MOBILE COMMUNICATION SYSTEM - There is provided to an RF calibration apparatus and method for a multi-antenna mobile communication system, which calibrates a phase error and gain error of an RF path by calculating the minimum value of a sum of an initialized reference signal and a comparison signal by a simple operation and controlling the phase value of a phase converter and the gain of a variable amplifier on the RF path, in calibrating the RF path of a multi-antenna mobile communication system of a TDD (Time Division Duplexing) type or FDD (Frequency Division Duplexing) type.03-04-2010
20110151809APPARATUS AND METHOD FOR ANALYZING CHANNEL USING TRANSMITTER IDENTIFICATION SIGNAL - Provided is a channel analysis apparatus and method using a transmitter identification signal. The channel analysis apparatus using the transmitter identification signal may include a reference signal generating unit to generate a reference signal, a correlation unit to correlate a received signal and the reference signal to calculate a correlation value, an interpolation unit to interpolate the calculated correlation value, and an analysis unit to analyze the received signal using the interpolated correlation value.06-23-2011
20120202441POWER DETECTION DEVICE AND METHOD OF DRIVING THE SAME - A power detection device includes first and second power detection circuits configured to output a first and second detection signals, respectively, each including a half-wave rectifier circuit having a transistor, and connected to an RF input terminal, a ripple filter having a transistor and a capacitor, and configured to filter ripples of a rectified signal from the half-wave rectifier circuit, a transmission circuit having a pair of transistors, and connected to the half-wave rectifier circuit and the ripple filter to transfer the rectified signal to the ripple filter, and a constant current source having a transistor to supply a current to the half-wave rectifier circuit, the ripple filter, and the transmission circuit, and a subtraction circuit configured to receive the first and second detection signals and to calculate a difference between the two signals.08-09-2012
20110053530BASE-STATION FAILURE PREDICTOR - A base-station failure predictor comprises an interface to at least one sub-unit of a base-station of a mobile communications network, an alarm memory, and an alarm evaluator. The base-station failure predictor is adapted to receive a plurality of alarms from the at least one sub-unit of the base-station via the interface. The plurality of alarms are stored in the alarm memory, and the alarm evaluator is adapted to analyze the frequency of the plurality of alarms to assess a likelihood of failure of the at least one sub-unit concerned. A base-station failure prediction method is also proposed. Furthermore, a computer program product with instructions for the manufacture and a computer program product enabling a processor to carry out the base-station prediction method are also proposed.03-03-2011
20110263215Method and Device in Over-the-Air Test Environment - The present invention relates to a device and method for simulating a radio channel with a defined characteristic between at least one antenna port (10-27-2011
20110201286WCDMA transmit architecture - A baseband digital processing module operates cooperatively with an analog signal processing module to effectuate highly adjustable and highly accurate gain adjustment in accordance with transmitter processing within a communication device. The gain adjustment and/or gain control is partitioned between the digital and analog domains by employing two cooperatively operating digital and analog modules, respectively. Gain adjustment in the analog domain is performed in a relatively more coarse fashion that in the digital domain. If desired, gain adjustment in each of the analog and digital domains is performed across a range of discrete steps. The discrete steps in the analog domain are larger than the discrete steps in the digital domain. Also, the discrete steps in the digital domain may be interposed between two successive discrete steps in the analog domain.08-18-2011
20100029226DETERMINING ON CHIP LOADING IMPEDANCE OF RF CIRCUIT - An R.F. transmitter circuit has an amplifier (02-04-2010
20090247095Method and system to prevent harmonics from causing distortion in a communications system - According to one exemplary embodiment, a method of preventing harmonics from causing distortion in a communications system includes feeding a test signal through a pre-distortion circuit in the communications system to a transmitter in the communications system. The method continues by transmitting a distorted output signal produced by the transmitter to an analyzer, analyzing the distorted output signal to identify one or more undesired harmonics, and generating and sending calibration data from the analyzer to calibrate the pre-distortion circuit, thereby preventing the one or more undesired harmonics from causing distortion in the communications system. In one embodiment, a system to prevent harmonics from causing distortion in a communications system includes a pre-distortion circuit, a transmitter, and an analyzer configured to identify one or more undesired harmonics and to generate and send calibration data to prevent the undesired harmonics from causing distortion.10-01-2009
20090258614IMPEDANCE MEASUREMENT IN AN ACTIVE RADIO FREQUENCY TRANSMITTER - A transmitter and method for determining impedance measurement in an active radio frequency transmitter of an antenna are provided. Voltage and current samples are obtained from a modulating signal delivered to an antenna. The voltage and current samples are converted from analog to digital format, and decimation occurs to reduce the number of samples. Complex demodulation is performed of each of the voltage and current samples to baseband levels and decimation of the voltage and current samples is performed to reduce the number of samples. An impedance estimate can then be estimated from the voltage and current samples.10-15-2009
20120040631Compact Radiofrequency Coupler - A compact and low-cost radiofrequency coupler, notably for the production of radiofrequency transmitters, includes a transmission line and a measuring line, the measuring line being coupled to the transmission line by the intermediary of windings, the transmission line, the measuring line and the windings being printed on a printed circuit board, upon which is fixed, by a clip-on technique, a binocular ferrite core that is essentially planar and E-shaped and whose central branch is disposed between the transmission line and the measuring line and whose distal branches are disposed in the central region of the planar windings.02-16-2012
20120003945SYSTEMS AND METHODS FOR 8-TX CODEBOOK AND FEEDBACK SIGNALING IN 3GPP WIRELESS NETWORKS - A mobile station for use in a wireless network. The mobile station is operable to transmit feedback values to a base station of the wireless network. The feedback values include a first precoder matrix indicator (PMI1) value and a second precoder matrix indicator (PMI2) value. The mobile station transmits the PMI2 value to the base station in the same subframe as a channel quality indicator (CQI) value. The CQI value may be either a wideband CQI value or a subband CQI value.01-05-2012
20120225628TELECOMMUNICATIONS NETWORK NODE AND METHODS - A telecommunications network node and methods are disclosed. The method is for generating, by genetic programming, evolved algorithms for adjusting base station transmission power to control coverage of a cell to assist in providing desired base station operating characteristics. The method comprises the steps of: generating, using predetermined functions and terminals defined in a functions and terminals list, a plurality of evolved algorithms each of which determine whether, for any particular base station operating conditions, to adjust said base station transmission power; determining a fitness level indicative of each evolved algorithm's ability to adjust base station transmission power to control coverage to achieve said desired base station operating characteristics under expected operating conditions; and iteratively performing said steps of generating and determining to generate further evolved algorithms using at least one of said evolved algorithms determined to have achieved a particular fitness level. In this way, it can be seen that algorithms can be assembled and then tested to see how suitable they are at controlling base station power to achieve particular operating characteristics under particular operating conditions. Those algorithms which are determined to be the best at achieving those characteristics under those particular operating conditions may then be used to generate further algorithms which, in turn, are also then assessed. Hence, those individual algorithms which are suited to the operating characteristics and the operating conditions can rapidly be generated thereby avoiding the need to manually design new algorithms which are specialised to particular environments.09-06-2012
20120258675Antenna Tuner in Combination with Modified Feedback Receiver for Improved Antenna Matching - Some embodiments of the present disclosure relate to techniques for automatically measuring antenna mismatching conditions for a given mobile phone with a given antenna in a given environment and on a given frequency. In particular, some embodiments use a two way directional coupler coupled between a radio frequency (RF) transmitter output (e.g., analog front end) and an antenna tuner. This two-way directional coupler is coupled to a mismatch calculator, which is often implemented as a software algorithm, to accurately tune an antenna tuner to limit impedance mismatch. Consequently, changes in impedance mismatch can be tracked and compensated for so the user will not experience degradations in signal quality, thereby helping reduce the number of dropped calls, for example. Also, because power is tracked and radiated more accurately, these techniques save battery energy relative to conventional solutions and can stay on-line longer with optimum transmitting conditions.10-11-2012
20090017780RESIDUAL CARRIER AND SIDE BAND PROCESSING SYSTEM AND METHOD - In a communication device, the LO leakage and opposite side band signals are measured at an output signal. Input processing signals to a modulator are adjusted in response to the measured values to minimize the LO leakage and maximize side band suppression.01-15-2009
20080311865Transmission scheduling control of average transmit signal power - A method and apparatus for a method of transmitting information is disclosed. The method includes analyzing information to be transmitted. Transmit time durations are set based upon the information to be transmitted. A transmit signal power level is determined based on the transmit time durations, and a predetermined average transmit signal power threshold per predetermined period of time.12-18-2008
20120270511Closed Loop Power Control for a Wireless Transmitter - Embodiments of the present disclosure provide systems and methods for estimating gain and phase error in a wireless transmitter. Embodiments of the present disclosure provide a gain and phase controller that uses a digital gain and phase estimator to jointly estimate both gain and phase. The forward and feedback signals of a wireless transmitter are digitized using analog to digital (ADC) converters. The digital signals are correlated with each other to dynamically extract gain and phase estimates of the loop. The gain and phase estimates are used to correct gain and phase errors in the wireless transmitter.10-25-2012
20120276860SYSTEM AND METHOD OF MEASURING TOTAL RADIATED POWER FROM MOBILE WIRELESS COMMUNICATIONS DEVICE - A system for testing a communications device includes a portable wireless communications device comprising a transmitter for transmitting an RF signal. A monitoring device receives the RF signals from the portable wireless communications device and analyzes the RF signals to determine total radiated power emitted from the transmitter. An adaptive antenna equivalent circuit is coupled to the transmitter. A connection line extends between the adaptive antenna equivalent circuit and the monitoring device. The adaptive antenna equivalent circuit has an equivalent antenna impedance matched to the portable wireless communications device and the connection line and monitoring device based on transmit frequency to ensure that total radiated power of the RF signals is transmitted from the transmitter to the monitoring device.11-01-2012
20100203853USAGE FREQUENCY DETERMINING DEVICE AND TRANSMITTING DEVICE - Current position information is acquired based on input by an inputting device. An available frequency memory stores, for each region, data regarding an available frequency that is not used for broadcasting from a broadcasting station. A usage frequency is determined based on the current position information and on the available frequency at the current position acquired referring to the data of the available frequency memory.08-12-2010
20120289175INDIVIDUALLY PHASE CONTROLLED RF OSCILLATORS FOR ANTENNA BEAM STEERING - A method of controlling the phases of RF output signals from a number of radio transmitters. A given radio has at least one synthesizer as a source of its RF output signal, and the synthesizer produces an output the phase offset of which relative to a reference signal is controlled by a phase offset command. A path from an antenna port of the radio obtains a fed back RF output signal and a phase difference between the reference signal and the fed back RF output signal is measured. A value of a zero degree phase offset command for the synthesizer is determined such that the phase difference between the reference signal and the fed back RF signal is nominally zero, and the value is stored. A phase offset command for providing a desired phase offset for the RF output signal is then determined based the stored value of the zero degree phase offset command.11-15-2012
20080233903Selection of filter coefficients for tranceiver non-linearity signal cancellation - Embodiments of a method and apparatus for selecting coefficients of a non-linear filter are disclosed. The non-linear filter receives a transmit signal and generates a non-linear replica signal of a transmit DAC of a transceiver. The method include applying a plurality of periodic test pattern signals to inputs of the transmit DAC, wherein the periodic test pattern signals include a stream of symbols. Receive symbols are collected at an output of a receiver ADC of the transceiver resulting from the plurality of periodic test pattern signals. A non-linear map is generated that provides a value for each of n consecutive symbols input to the transmit DAC. Coefficients of the non-linear filter are selected based on the non-linear map.09-25-2008
20130178176METHOD FOR MONITORING A TRANSMITTER AND CORRESPONDING TRANSMITTER - A method for monitoring a transmitter (07-11-2013
20100233975AUTOMATED POWER CONTROL TO OPTIMIZE POWER CONSUMPTION AND IMPROVED WIRELESS CONNECTION - A method for automatically adjusting signal output power of a ZigBee wireless module. The method includes sending a signal with an output power from a transmitter of a ZigBee module to a receiver. The ZigBee module includes a power amplifier/low noise amplifier (PA/LNA) circuit. The output power can be adjusted between a minimum level and a maximum level. Additionally, the method includes generating a Link Quality Indicator (LQI) by the receiver based on the signal strength and returning the LQI to the ZigBee module. If the LQI is not within a predetermined range between a maximum value and a minimum value, the method includes adjusting the output power for sending next signal. If the output power from the transmitter has reached to the minimum level or the maximum level, the method further includes adjusting the PA/LNA circuit of the ZigBee module for maintaining the LQI within the predetermined range.09-16-2010
20130115900METHOD FOR CONTROLLING TERMINAL SIGNAL TRANSMISSION, AND TERMINAL - Embodiments of the present invention disclose a method for controlling terminal signal transmission, and a terminal. A method for controlling terminal signal transmission includes: monitoring a current working mode of a terminal; transmitting a signal according to first transmit power if it is found through monitoring that the terminal is currently in a first working mode, and transmitting the signal according to second transmit power if it is found through monitoring that the terminal is currently in a second working mode, where the first transmit power is greater than the second transmit power. The technical solution of the embodiments of the present invention helps to enable the terminal to obtain as good radio reception and transmission performance as possible at a same radiation absorption index.05-09-2013
20130143506SYSTEM AND METHOD FOR CHANNEL-ADAPTIVE ANTENNA SELECTION - Systems and methods that provide channel-adaptive antenna selection in multi-antenna element communication systems are provided. In one embodiment, a method that selects a subset of receive antennas of a receiver to receive a transmitted RF signal may include, for example, one or more of the following: establishing possible subsets of the receive antennas; determining sets of channel parameter statistics corresponding to the possible subsets of the receive antennas; computing output bit error rates of the receiver, each output bit error rate being computed based on at least one set of channel parameter statistics; selecting a particular possible subset of the receive antennas based upon a criterion predicated on the computed output bit error rates; and connecting one or more RF chains of the receiver to the receive antennas of the selected particular possible subset.06-06-2013
20130157596Method for Transmitting a Signal Below a Current Transmit Power in a Network - A transmitter includes a detection element to determine when a current power requirement of a communication link is less than the standard transmit power. The current power requirement may be determined by a current operation condition of the communication link, for instance. The transmit power of the transmitter may be set to be less than the standard power in any of a variety of ways. For example, a center tap voltage of the transmitter may be reduced. In another example, a class of operation of the transmitter may be changed. In yet another example, the transmitter may include a current mirror having a plurality of diode-connected transistors coupled in parallel, thereby reducing the current at output terminals of the transmitter. Reducing, the current at the output terminals decreases the output power of the transmitter, which may reduce the power consumed by the transmitter.06-20-2013
20110159826WIRELESS COMMUNICATION UNIT, SEMICONDUCTOR DEVICE AND POWER CONTROL METHOD THEREFOR - A wireless communication unit comprises a transmitter comprising a power amplifier, an inner feedback power control loop having a power control logic module comprising loop priming logic module operably coupled to the power amplifier, and a switchable outer digital loop comprising switchable logic module. The loop priming logic module is arranged to set a power reference value for controlling the power amplifier prior to a ramping operation of the power amplifier and the switchable logic module switching the switchable outer digital loop on or off, thereby restricting adverse transient behaviour of the power amplifier.06-30-2011
455115200 Using a test signal 12
20090124219High linearity, high efficiency power amplifier with DSP assisted linearity optimization - A communications transceiver includes a baseband processor, a receiver section, and a transmitter section that includes a power amplifier. The receiver and transmitter sections communicatively couple to the baseband processor. In a calibration operation, the baseband processor produces a test signal to the transmitter section. Further, the baseband processor causes each of a plurality of power amplifier bias settings to be applied to the power amplifier. For each of the plurality of power amplifier bias settings, the power amplifier produces an amplified test signal, the receiver section couples back a portion of the amplified test signal to the baseband processor, and the baseband processor produces a characterization of the amplified test signal respective. Based upon a plurality of characterizations of the amplified test signal and respective power amplifier bias settings, the baseband processor determines power amplifier bias control settings. The baseband processor then applies the power amplifier bias control settings to the power amplifier.05-14-2009
20090098841METHOD AND APPARATUS FOR TRANSMITTING A PILOT REPORT (PILOTREPORT) MESSAGE IN WIRELESS COMMUNICATION SYSTEMS - A method and apparatus for transmitting a PilotReport message is provided, comprising generating the PilotReport message and determining if an Active Set Size value is greater than one. In an embodiment, the access terminal will send a PilotReport message if one of the following conditions occurs: If the Active Set Size is greater than one, and EnhancedPilotReportEnabled=1, and The strength of a pilot in the active set has changed by more than an EnhancedPilotReportThreshold since the last PilotReport was sent. If the Active Set Size is one, and EnhancedPilot ReportEnabled=1, and The strongest current non-active pilot (for example, pilot j) has strength more than the EnhancedPilotReportRatio fraction of the total interference, and The strength of pilot j is more than EnhancedPilotReportThreshold away than the strength of the second strongest pilot at the time the last pilot report was sent.04-16-2009
20090221246METHOD AND SYSTEM FOR CALIBRATING QUADRATURE MODULATORS - A calibration method and system for reducing modulation errors in a telecommunication transmitter apparatus includes providing a pair of test signals, which are substantially in quadrature to each other, and to repeat an estimation loop. The estimation loop starts with generating a modulated signal by modulating the test signals (the modulation introducing a modulation error) and continues by obtaining a squared signal corresponding to the square of the modulated signal. A transformed signal corresponding to the squared signal in the frequency domain is then calculated. The estimation loop further includes calculating an error indicator, indicative of the modulation error, according to the modulus of the transformed signal. A compensation, to be applied to the test signals for counterbalancing the modulation error, is calculated according to the error indicator and is then applied to the test signals. The estimation loop is repeated until the error indicator reaches a threshold and an indication of the compensation resulting from a last iteration of the estimation loop is stored (for the application of the compensation to each pair of operative signals managed by the telecommunication transmitter apparatus during operation thereof).09-03-2009
20090221247METHOD AND SYSTEM FOR CALIBRATING QUADRATURE MODULATORS - A calibration method for reducing modulation errors in a telecommunication transmitter apparatus includes providing a plurality of pairs of test signals; the test signals of each pair are substantially in quadrature to each other, and the pairs of test signals are at least in part different with all the pairs of test signals that have a substantially equal energy. A plurality of modulated signals are generated, with each modulated signal that is generated by modulating a corresponding pair of test signals. A plurality of transformed signals are calculated, each one corresponding to the square of a corresponding modulated signal in the frequency domain. A plurality of partial error indicators are calculated, each one as a function of the modulus of a corresponding transformed signal. The partial error indicators are indicative of the modulation errors associated with the modulated signals. A compensation for counterbalancing the modulation errors is calculated according to a combination of the partial error indicators and an indication of the compensation is stored for the application of the compensation to each further pair of operative signals during operation of the telecommunication transmitter apparatus.09-03-2009
20100279633METHOD AND SYSTEM FOR MEASURING AND OPTIMIZING INTEGRATED ANTENNA PERFORMANCE - A method and system for wireless communication is provided and may include transmitting FM radio signals utilizing antenna configurations in a wireless device including a frequency modulation (FM) radio transmitter, an FM radio receiver, and one or more other receivers. The transmitter may be calibrated based on a signal received from a second wireless device via the other receivers. The second wireless device may include an FM radio receiver and corresponding other transmitters that may utilize other wireless protocols. The signal received at the wireless device may be generated at the second wireless device via the other transmitters. A frequency of the transmitted FM radio signals may be varied, and may be utilized adjust the antenna configurations. An impedance of the antenna configurations may be matched based on the frequency variation. A capacitive and/or inductive load for the matching of the impedance of the antenna configurations may be programmably adjusted.11-04-2010
20100227574INTEGRATED CIRACUIT WITH RF MODULE, ELECTRONIC DEVICE HAVING SUCH AN IC AND METHOD FOR TESTING SUCH A MODULE - The present invention discloses an integrated circuit (09-09-2010
20100184392TRANSMITTER LINEARIZATION - One aspect of the invention includes a communication system that includes a tone generator configured to generate a first tone, a second tone, and a third tone. The third tone can have a frequency that is a harmonic product of at least one of the frequencies of the first and second tones. A transmitter that includes a predistortion system transmits a test signal comprising the first, second, and third tones. A receiver that is communicatively coupled to the transmitter receives and processes a received test signal corresponding to the test signal. The system further includes a controller that generates a set of correction coefficients based on a measured interaction of the third tone with a non-linear signal component in the received test signal. The set of correction coefficients can be provided to the predistortion system for substantially linearizing communication signals transmitted from the transmitter.07-22-2010
20120202442TRANSMITTER, BASE STATION DEVICE, AND METHOD FOR ALIGNING SIGNAL OUTPUT FROM TRANSMITTER - A transmitter, a base station device, and a method for aligning a signal output from a transmitter are provided. The transmitter is connected to a first antenna, and the first antenna detects a second test signal transmitted by a second antenna that is connected to another transmitter. The transmitter includes: a signal generating unit, which generates a first test signal; a directional coupler, which receives the first test signal and the second test signal; and a signal processing unit, which measures a timing difference between the first test signal and the second test signal, and uses the measured timing difference to control signal generation, so as to align a signal transmission delay between the two transmitters. Thus, closed-loop detection and an adaptive rectification mechanism for transmission signals of multiple transmitters can be implemented, and accuracy of aligning a signal at each transmitting antenna is improved.08-09-2012
20110028109WIRELESS COMMUNICATIONS DEVICE WITH WHITE GAUSSIAN NOISE GENERATOR AND RELATED METHODS - A wireless communications device may include a wireless transmitter, a modulator connected to the wireless transmitter, and a white Gaussian noise generator connected to the modulator. The white Gaussian noise generator may include at least one pseudorandom number generator, and a fast Walsh transform module for generating white Gaussian noise based upon the pseudorandom numbers.02-03-2011
20110098012Transmitter with Self-Test Capability - A radio transmitter includes a transmitter circuit having a transmission output and being configured to generate at the transmission output a signal for transmission; a reference voltage circuit configured to generate a substantially temperature-invariant reference voltage; a reference signal circuit having a reference output and being configured to receive the substantially temperature-invariant voltage generated by the reference voltage circuit and to generate at the reference output an oscillating reference signal of an amplitude that is derived from the temperature-invariant reference voltage; an amplitude sensor having an input and being configured for sensing the amplitude of a signal at the input and generating a sensed amplitude signal indicative of the sensed amplitude; and control apparatus configured to control the radio transmitter to operate in each of: a) a first mode in which it causes the input of the amplitude sensor to be coupled to the reference output; and b) a second mode in which it causes the input of the amplitude sensor to be coupled to the transmission output.04-28-2011
20110136449Testing System and Power Calibration Method Thereof - The present invention relates a testing system and a power calculation method thereof. The testing system comprises a control unit and a measuring unit. The control unit is coupled to the wireless module and controls the wireless module to transmit a wireless signal with a default power value. The measuring unit is coupled to the control unit and coupled to the wireless module through a radio frequency cable. The measuring unit is controlled by the control unit for setting a measuring mode of the measuring unit, and measures the wireless signal to output a measured power value to the control unit. The control unit adjusts the default power according to the measured power value thereby compensating for power loss of the radio frequency cable.06-09-2011
20100178885RADIO COMMUNICATION METHOD AND RADIO COMMUNICATION DEVICE - The radio communication method for transmitting a burst signal including a synchronization identification signal and a data signal according to the present invention comprises a step for comparing the error tolerances of the synchronization identification signal and the data signal and a step for varying transmission power(s) of one or both of the synchronization identification signal and the data signal in accordance with the error tolerances compared (FIG. 07-15-2010
455115300 Signal strength 12
20110195680METHOD AND SYSTEM FOR AUTOMATICALLY IDENTIFYING WIRELESS SIGNAL QUALITY OF A REGION - A method for automatically identifying wireless signal quality of a region includes receiving signal quality information associated with wireless signals received by each of a plurality of mobile endpoints and receiving location information identifying locations of each of the plurality of mobile endpoints. The method also includes, based on the received signal quality information and the received location information, identifying a first region of an area, the first region having a first signal quality.08-11-2011
20130040588DYNAMIC WIRELESS NETWORKS AND INTERACTIVE WIRELESS INFORMATION COMMUNICATION AND DELIVERY SYSTEMS FOR CALCULATING DISTANCE TO AN OBJECT - A method is disclosed for calculating a distance to objects or a nearest object to a wireless enabled device. The method includes the steps of broadcasting a signal by the wireless enabled device to data tags, receiving by the data tags the signal by the wireless enabled device, and obtaining by each of the data tags a signal strength indicator of the wireless enabled device based on the signal from the wireless enabled device. Each of the data tags in a range transmits a signal to the wireless enabled device including the signal strength indicator of the wireless enabled device. Each signal strength indicator of the wireless enabled device is communicated to a positioning and communication system.02-14-2013
20100035567ANTENNA FOR MOBILE TERMINAL AND METHOD FOR CHANGING RADIATION PATTERN USING THE SAME - An antenna of a mobile terminal and a method for changing a radiation pattern of the mobile terminal are provided. The antenna includes an antenna radiator including at least two different feeding points, a Radio Frequency (RF) receiver selectively connected to one of the at least two different feeding points of the antenna radiator, a switching unit interposed between the RF receiver and the antenna radiator for electrically connecting one of the at least two different feeding points to the RF receiver, and a controller for controlling the switching unit using a Received Signal Strength Indicator (RSSI) value determined at a path connected to the feeding point of the antenna radiator.02-11-2010
20080207149SYSTEMS AND METHODS FOR DETERMINING A LOCATION FOR A COMMUNICATION FACILITY - A computer-based program performs calculations to analyze, vary, test, manage, and/or improve the performance of channels and/or frequencies in the communication spectrum. The program varies parameters of a point of communication, such as the location, transmission power, channel frequency, antenna height, and the like, alone or in combination, to measure, test, and/or evaluate which parameter changes increase the market coverage of a target market or area. In some scenarios, changes to one point of communication cause the regulations governing the broadcast relationship between one or more nearby points of communication to be violated. When this occurs, the program determines which of the parameters, such as the location, transmission power, channel and/or frequency, antenna height, and the like, alone or in combination, of the point of communication interfering with the increased market coverage scenario to vary to overcome the conflict with communications and/or regulatory law. In addition, the program can determine simultaneously which of the parameters of multiple points of communication to vary to overcome the conflict with communications and/or regulatory law. The program outputs multiple solutions with varying degrees of difficulty and varying amounts of performance improvement.08-28-2008
20090004979METHOD OF CONTROLLING COMMUNICATION MECHANISM UTILIZED TO ARBITRATE TRANSMISSIONS OF WIRELESS SIGNALS AND COMMUNICATION APPARATUS UTILIZING THE SAME - A method of controlling a communication mechanism utilized to arbitrate transmissions of a first and a second wireless signals and a communication apparatus utilized the method are disclosed. The method includes determining a transmission quality indicator corresponding to one of the first wireless signal and the second wireless signal, and dynamically turning the communication mechanism on or off according to the transmission quality indicator. Therefore, the present invention is able to arbitrate transmissions of different wireless signals while decreasing the occurrence of transmission disconnection resulted from the arbitration.01-01-2009
20100003934ADAPTIVE METHOD OF TRANSMITTING AND RECEIVING A SIGNAL IN A MULTI-ANTENNA SYSTEM, CORRESPONDING TRANSMISSION AND RECEPTION DEVICES, COMPUTER PROGRAM PRODUCTS AND SIGNAL - A method is provided for receiving a signal, corresponding to a data signal transmitted by a transmitter to a receiver via a transmission channel. The method includes the following steps: analyzing the signal received, delivering an information item representative of the transmission channel; determining, periodically and/or as a function of a variation of the transmission channel: at least one distribution of the transmission antennas into at least one group of at least one antenna as a function of the information item representative of the transmission channel, wherein at least one group includes at least two transmission antennas for at least one of the determinations; and specific efficiencies assigned respectively to each of the groups of antennas for each distribution as a function of the information item, and transmitting to the transmitter a parameterization signal defining the at least one distribution and the specific efficiencies.01-07-2010
20120077450Power calibration under voltage standing wave ratio change by frequency sweep - A power calibration algorithm is performed on a wireless communication device, where power measurements are taken across frequency sweep at the output of the device and at a power amplifier of the device, to accurately track voltage standing wave ratio impedance and errors associated with VSWR impedance. The measurements are performed as part of production of the wireless communication device and during online operation of the wireless communication device. During online operation the measurements are made by a detector at the power amplifier over the various frequencies of the frequency sweep.03-29-2012
20090149141SIGNAL SHIELDING BOX WITH A PLURALITY OF SHIELDING COVERS - A signal shielding box with a plurality of shielding covers is provided. The shielding covers are pivotally connected with a shielding case and cover one another so as to respectively conceal or expose the opening. A connector is positioned at the shielding case and is electrically connected with the wireless communication device within the shielding case. The connector is electrically connected with a measurement and analysis device out of the shielding case. The shielding covers are respectively opened and closed so as to expose and conceal the opening. Thus, a plurality of shielding effects are formed so as to shield and measure signals of the wireless communication device.06-11-2009
20100323642Radio Communication Method and Radio Communication Terminal - The present invention is summarized as a radio communication method including the steps of: calculating a transmission power difference between transmission power values of the first carrier and the second carrier; determining whether the transmission power difference exceeds a threshold set on the basis of a maximum transmission power difference allowable between the first carrier and the second carrier; and stopping a transmission of reverse link data using one of the first carrier and the second carrier with a larger transmission power for a certain period in a case where the transmission power difference exceeds the threshold set on the basis of the maximum transmission power difference.12-23-2010
20110003565METHOD AND APPARATUS FOR DETERMINING WHETHER MOBILE TERMINAL NORMALLY OPERATES - A method and an apparatus for determining whether a mobile terminal operates normally are provided. The method includes generating a transmission signal, isolating, at a Front End Module (FEM), the transmission signal provided to an antenna, and outputting the same, measuring a level of the output signal, and comparing the measured level of the output signal with a preset threshold level to determine that at least one of a Power Amplifier Module (PAM) and the FEM operates normally.01-06-2011
20080299921ON-CHIP DIRECTIONAL COUPLER FOR RF TRANSMITTER OUTPUT POWER MEASUREMENT - An integrated circuit radio transceiver and method therefor include circuitry for generating and power amplifying an outgoing RF signal to produce a power amplified outgoing signal, conducting the power amplified outgoing signal down a transmission path that is disposed substantially parallel to a directional coupler formed on a metallization layer of the integrated circuit, producing a sensed signal level sensed in the directional coupler to a power detector and determining the forward output power based upon the sensed signal level.12-04-2008
20110223874POWER EFFICIENT COMMUNICATIONS - A method, system, and device provide power-efficient communications within the context of available power. Transmission and receipt data rates are scalable in accordance with output power available from a power source. Data is transmitted at a data rate determined, at least in part, by the available output power.09-15-2011
455115400 Having meter or indicator 5
20100190457APPROXIMATION METHOD FOR SIGNAL-TO-NOISE RATIO SOFT INFORMATION FOR A COMMUNICATIONS SYSTEM - An approximation method for SNR soft information for a transmitter of a communications system includes obtaining a conditional probability density function (PDF) corresponding to a response message of a transmitted packet, obtaining a PDF of a probability distribution model, and a mean and a variance of the PDF, by approximating the conditional PDF corresponding to the response message with the probability distribution model, and calculating a second mean and a second variance of a second PDF approximated to a conditional PDF of SNR corresponding to the transmitted packet according to the mean and the variance of the PDF, and a first mean and a first variance of a first PDF approximated to a conditional PDF of SNR corresponding to another transmitted packet immediately preceding the transmitted packet.07-29-2010
20120214430Self Evaluating Transmitter - A self-evaluating process control transmitter system includes a transmitter configured to capture output data from an integral sensor, and a transmitter memory integrally disposed with the transmitter. The transmitter memory is configured to store a plurality of sets of the output data thereon, including an initial as-built data set, and at least one subsequent data set. A self evaluation module integrally disposed with the transmitter, in communication with the transmitter memory is configured to identify one or more variations between the as-built data set and at least one subsequent data set.08-23-2012
20110124303SYSTEM FOR MONITORING AND CONTROLLING THE POWER OF A RADIO FREQUENCY (RF) SIGNAL IN A SHORT-RANGE RF TRANSMITTER - A system for monitoring and controlling the power of a Radio Frequency (RF) signal in a short-range RF transmitter. An RF signal-generation unit generates the RF signal. A power amplifier amplifies the RF signal. An impedance-matching network matches the output impedance of the power amplifier to input impedance of an antenna. One or more RF power monitors monitor the voltage amplitude of the RF signal at the output of at least one of the RF signal-generation unit, the power amplifier and the impedance-matching network. The one or more RF power monitors further generate at least one alarm signal, based on the voltage amplitude of the RF signal. A control unit modifies at least one operating parameter of at least one of the RF signal-generation unit and the power amplifier, based on the at least one alarm signal generated by the one or more RF power monitors.05-26-2011
20120021708METHOD AND APPARATUS FOR ALARMING IN A POWER SUPPLY MODULATED SYSTEM - A communication device is presented that has different processors and a power amplifier. One of the processors receives a signal from a monitor and indicates that an alarm exists to a diagnostics module. The other processor uses the envelope signal of the input signal to be amplified and either the signal from the diagnostics module, the monitor or the power amplifier to adjust modulation of the power supply of the power amplifier dependent on the type of alarm. The power supply voltage or headroom is maximized or frozen at the value of the last detection cycle if a fault or impairment, respectively, of the power amplifier is detected.01-26-2012
20110159827Monitoring Channels - A transmitter of a cognitive radio comprises a selector for selecting from a memory a channel which is determined free, for a power measurement. A power meter measures the received power from the selected channel. Detection selector compares the measured power and a power of the same channel saved in the memory and selects the channel for detection if the power in the channel is within a predetermined range from the power saved in the memory. A detector performs detection of the channel as a response to the selection for detection. A channel selector selects the channel for communication if the channel is detected unoccupied on the basis of detection. The transmitter communicates in the channel as a response to the selection for communication.06-30-2011

Patent applications in class Measuring, testing, or monitoring of transmitter

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