Patent application number | Description | Published |
20090245288 | Techniques for Reducing Interference in a Communication System - A technique of operating a communication device includes identifying a signal null associated with a signal to be transmitted on a first communication channel. A channel gain of the first communication channel is adjusted at a time that substantially coincides with the signal null to reduce transient noise spectrum coupled from the first communication channel to one or more second communication channels. | 10-01-2009 |
20090280758 | WIRELESS COMMUNICATION UNIT AND POWER CONTROL SYSTEM THEREOF - A wireless communication unit comprises a transmitter having an analogue feedback power control loop having a power control function arranged to set an output power level of the transmitter. The power control function comprises a predictor sub-system arranged to reduce sensitivity to loop latency of the analogue feedback power control loop. | 11-12-2009 |
20100009642 | POWER CONTROL SYSTEM FOR A WIRELESS COMMUNICATION UNIT - A wireless communication unit comprises a transmitter having an analogue feedback power control loop with an input and a power amplifier having a power amplifier output, where the analogue feedback power control loop is arranged to feedback a signal to the input to set an output power level of the transmitter. The wireless communication unit further comprises an outer digital loop operably coupled from the power amplifier output to the transmitter. | 01-14-2010 |
20100034192 | WIRELESS COMMUNICATION DEVICE, INTEGRATED CIRCUIT AND METHOD OF TIMING SYNCHRONISATION - A wireless communication device comprises a first sub-system arranged to pass data to a second sub-system comprising timing synchronisation logic operably coupled to a counter, such that data is sampled by the timing synchronisation logic when passed to the second sub-system from the first sub-system wherein the wireless communication device is characterised in that the timing synchronisation logic is arranged to determine a position of a first data frame and in response thereto initiate a counting process of the counter and determine a position of a second data frame and in response thereto determine a count value from the counting process of the counter and in response to the count value determine whether to initiate a timing advance or timing retard operation on the data being passed to the second sub-system. In this manner, the inventive concept provides the wireless communication device with a mechanism to achieve timing synchronisation. In particular, the inventive concept may allow a radio frequency integrated circuit to implement timing synchronisation by advancing or retarding an ‘actual’ signal sent from digital baseband circuits in a 3G DigRF wireless communication device. | 02-11-2010 |
20100105343 | SYSTEMS AND METHODS FOR ADJUSTING HEADROOM OF A POWER AMPLIFIER - Systems and methods are provided for controlling headroom of an amplifier (e.g., in a transmitter). A method comprises obtaining a target output power for a current interval and obtaining a target headroom for a subsequent interval. The method continues by adjusting, during the current interval, the power output capability of the amplifier based on the target headroom and adjusting the input power of an input signal based on the target output power, such that the output power of the amplifier is substantially constant during the current interval as the power output capability of the amplifier is adjusted. | 04-29-2010 |
20100111238 | ERROR SIGNAL PROCESSING SYSTEMS FOR GENERATING A DIGITAL ERROR SIGNAL FROM AN ANALOG ERROR SIGNAL - Apparatus, systems, and methods are provided for controlling the output of a transmitter using a digital error signal. A method comprises generating a digital reference signal based on a baseband input signal and converting the digital reference signal to an analog reference signal. The method further comprises generating an analog error signal in response to a difference between the analog reference signal and an analog output signal. The method further comprises generating a digital error signal from the analog error signal, and generating an input signal for the transmitter based on the baseband input signal and the digital error signal. | 05-06-2010 |
20100117824 | METHOD AND APPARATUS TO RECEIVE LOCATION INFORMATION IN A DIVERSITY ENABLED RECEIVER - A method of processing location information on a mobile device which includes a primary receiver for receiving a primary signal; a diversity receiver for receiving a diversity signal or location information; a diversity combiner which can combine primary and diversity signals to form a combined signal; and a first processing unit for processing the combined signal; the method comprising the steps of: identifying whether the device is in a location mode or a diversity mode; if the device is in location mode, disabling the diversity combiner; passing the output from the primary receiver directly to the first processing unit; and passing location information from the diversity receiver to a location processing unit. | 05-13-2010 |
20100215133 | METHODS AND SYSTEMS FOR COMBINING TIMING SIGNALS FOR TRANSMISSION OVER A SERIAL INTERFACE - Apparatus, systems, and methods are provided for transmitting messages over a serial interface. A method comprises receiving a first signal at a first time and receiving a second signal at a second time, the second time being after the first time. If a difference between the second time and the first time is less than a threshold time period, the method comprises generating a first message that is representative of the first signal and the second signal and transmitting the first message over the serial interface. In accordance with one embodiment, the threshold time period is equal to one half of an interface acquisition delay time period associated with the serial interface. | 08-26-2010 |
20100311464 | WIRELESS COMMUNICATION UNIT, BASEBAND MODULE, RADIO FREQUENCY MODULE, WIRELESS TERMINAL AND COMPUTER PROGRAM PRODUCT - A wireless communication unit has two or more communication modes including one or more mobile phone mode, in which mobile phone mode the wireless communication unit is able to transmit or receive wireless signals via an antenna from and/or to a mobile phone network in accordance with a communication protocol. The unit includes a baseband module and a radiofrequency module. A radiofrequency interface of the baseband module is connected to the radiofrequency module, for receiving and/or transmitting baseband signals from and/or to the radiofrequency module. The radiofrequency module includes a baseband interface, for receiving and/or transmitting the baseband signals to the baseband module and an antenna interface (AI) connectable to an antenna for receiving and/or transmitting radiofrequency signals from and/or to the antenna. A clock system is connected to the radiofrequency interface and the baseband interface. The clock system can provide a clock signal with a clock rate of to the radiofrequency interface and the baseband interface in one or more of the one or more mobile phone modes. | 12-09-2010 |
20130039368 | SYSTEM AND METHOD FOR FREQUENCY-AGILE TRANSMISSION IN A WIRELESS COMMUNICATION DEVICE - In accordance with some embodiments of the present disclosure, a method may include determining a range of frequencies allocated to resource blocks to be transmitted during a subsequent sub-frame slot or sounding reference symbol sub-slot. The method may also include determining an approximate center frequency of the range of frequencies. The method may additionally include modulating resource blocks of the sub-frame or sounding reference symbol sub-slot at the approximate center frequency. The method may further include transmitting the modulated resource blocks at the approximate center frequency. | 02-14-2013 |
20140364132 | REDUCING TRANSMISSION SIGNAL ARTIFACT SPACING - A method of generating a transmission signal may include mixing a baseband signal assigned for transmission within a narrow frequency range (“assigned narrow frequency range”) included in a wireless communication channel to produce a shifted signal. The shifted signal may have a shifted frequency that is based on a shift from the assigned narrow frequency range toward a center frequency of the wireless communication channel by a frequency offset. The method may further include shifting a modulation frequency of a modulating signal toward the assigned narrow frequency range frequency range and away from the center frequency by the frequency offset. Additionally, the method may include mixing the shifted signal with the modulating signal to produce a transmission signal having a transmission frequency within the assigned narrow frequency range. | 12-11-2014 |