| Patent application number | Description | Published |
|---|
| 20080227421 | Reducing Power Consumption In Receivers Employing Conversion To Intermediate Frequency - A receiver to recover a signal of interest while consuming reduced power in some scenarios. The receiver contains a in-phase channel processing path and a quadrature phase channeling path for down converting an input signal to an intermediate frequency, and then recovering the signal of interest by further processing of the input signal at intermediate frequency. One of the two paths is turned off upon occurrence of a desired condition, which reduces power consumption. In an embodiment, the condition is that the input signal does not contain an image signal of the signal of interest. | 09-18-2008 |
| 20080310538 | Versatile System for Dual Carrier Transformation in Orthogonal Frequency Division Multiplexing - The present invention provides a versatile system for selectively spreading carrier data across multiple carrier paths within an Orthogonal Frequency Division Multiplexing (OFDM) system ( | 12-18-2008 |
| 20090028220 | Robust packet detection, symbol timing, channel length estimation and channel response estimation for wireless systems - A method. The method includes producing a first signal match indication based on at least one match indication indicative of a match between at least one signal received in at least one band and a reference signal. The method also includes producing a first signal multipath combined signal based upon the first signal match indication, and detecting a first peak in the first multipath combined signal. | 01-29-2009 |
| 20100036459 | SIGNALING IN A MEDICAL IMPLANT BASED SYSTEM - Signaling in a medical implant based system. A method includes transmitting bits modulated with a predefined sequence in a band of channels by a first medical transceiver. The method includes detecting the predefined sequence by a second medical transceiver. The method also includes performing predetermined action if the predefined sequence is detected. In one example, the predetermined action includes determining presence of a signal. | 02-11-2010 |
| 20100036462 | POWER OPTMIZATION IN A MEDICAL IMPLANT BASED SYSTEM - Power optimization in a medical implant based system. A method includes receiving a portion of a signal by a first transceiver. The method further includes determining, from the portion of the signal, a time duration after which a subsequent portion of the signal will be transmitted. The subsequent portion is transmitted at end of the portion. The method also includes entering into an inactive state for the time duration. | 02-11-2010 |
| 20100111138 | Versatile System for Dual Carrier Transformation in Orthogonal Frequency Division Multiplexing - The present invention provides a versatile system for selectively spreading carrier data across multiple carrier paths within an Orthogonal Frequency Division Multiplexing (OFDM) system, particularly an ultra-wideband (UWB) system. The present invention provides a data input, which passes data to a randomizer. The data then passes to a convolutional code function, the output of which is punctured by puncturing function. An interleaver function receives the punctured code data, and cooperatively operates with a mapper element to prepare the coded data for pre-transmission conversion by an IFFT. The mapper element comprises a dual carrier modulation function, which associates and transforms two punctured code data elements into a format for transmission on two separate signal tones. | 05-06-2010 |
| 20100232490 | METHOD AND APPARATUS FOR COMPENSATING A MODULATION IMBALANCE EFFECT IN A COMMUNICATION DEVICE - A method and apparatus for compensating a modulation imbalance effect in a communication device. In one embodiment, at least three sets of modulation imbalance parameters (MIPs) are estimated by executing an auto balance sequence. The at least three sets of MIPs correspond to a baseband signal configured to have at least three configurable frequencies, each of the at least three sets of MIPs corresponds to one of at least three configurable frequencies. The auto balance sequence is configured to provide an offset signal generated within a communication device to trigger generation of each one of the at least three configurable frequencies. The at least three sets of MIPs are filtered to select a filtered set. The modulation imbalance effect is compensated by using the filtered set to reduce distortion of the baseband signal in the communication device. | 09-16-2010 |
| 20100232548 | DEMODULATION AND DECODING FOR FREQUENCY MODULATION (FM) RECEIVERS WITH RADIO DATA SYSTEM (RDS) OR RADIO BROADCAST DATA SYSTEM (RBDS) - Demodulation and decoding for frequency modulation (FM) receivers with radio data system (RDS) or radio broadcast data system (RBDS). An example of a method for processing a signal in a receiver includes quantizing a demodulated signal to generate bits in response to receipt of the demodulated signal. The method also includes grouping the bits into one or more blocks. The method further includes computing a syndrome for a block from the one or more blocks. Moreover, the method includes identifying error, corresponding to the syndrome, in the block based on type of demodulation. The type of demodulation includes a coherent demodulation and a differential demodulation. Furthermore, the method includes correcting the error in the block. | 09-16-2010 |
| 20110006933 | TIME-INTERLEAVED ANALOG-TO-DIGITAL CONVERTER - A time-interleaved (TI) analog-to-digital converter (ADC) is provided. The TI ADC generally comprises a clock generator, two or more ADCs, adjustable delay elements, and an estimator. The clock generator generates clock signals. Each ADC is associated with at least one of the clock signals so as to sample an input signal that is generally wide-sense stationary at sampling instants, where correlation function exist between samples from a two or more of the ADCs that is a function of the time differences between associated sampling instants. The estimator is coupled to each of the adjustable delay elements and each of the ADCs so as to calculate the correlation function and adjust the adjustable delay elements to account for sampling mismatch between the ADCs based at least in part on the correlation function. | 01-13-2011 |
| 20110026616 | METHOD AND APPARATUS FOR DOPPLER ESTIMATION IN ORTHOGONAL FREQUENCY-DIVISION MULTIPLEXING (OFDM) - A method and apparatus for estimating Doppler channel in an Orthogonal Frequency-Division Multiplexor. The method includes selecting a continuation pilot, generating a channel estimation, filtering the continual pilot with at least one channel estimator, computing the error between the channel estimation and the filtered channel estimates, averaging the error across continual pilot carriers and over time, estimating noise variance, corrects average error utilizing the estimated noise variance to generate an estimate of the overall channel estimator error, and setting the filter cutoff to minimum estimation error. | 02-03-2011 |
| 20110051639 | DYNAMIC LOW POWER RADIO MODES - A receiver in a packet based communication system includes a programmable block and a detection block that detects at least one of an operating condition of the receiver and a protocol condition of the communication system. Further, the receiver includes a control circuit coupled to the programmable block that controls the programmable block to transition to a set of radio modes according to at least one of the operating condition and the protocol condition. | 03-03-2011 |
| 20110058626 | Ultra Wideband Interference Cancellation for Orthogonal Frequency Division Multiplex Transmitters by Protection-Edge Tones - A transmitter and communication system are disclosed. A first component operable to determine an active interference cancellation value for each of a plurality of active interference cancellation tones and a protection-edge value for each of a plurality of protection-edge tones based on optimizing active interference cancellation, and further based on constraining an average power of the active interference cancellation values and the protection-edge values to less than or equal to a maximum power level, and on a plurality of data values. A second component is operable to transform a sequence of tones to a time domain signal, the sequence of tones comprised of the active interference cancellation tones, the protection-edge tones, and a plurality of data tones, the data tones containing the data values. A third component operable to transmit an orthogonal frequency division multiplex signal based on the time domain signal. | 03-10-2011 |
| 20110064029 | DOWNLINK SIGNALING FOR A MULTI-CARRIER COMMUNICATIONS SYSTEM - System and method for signaling control information in a multi-carrier communications system to transmit data. A preferred embodiment comprises demodulating a first carrier that is used for transmitting a control channel transmission, determining a second carrier that is used for transmitting a data channel transmission based upon the demodulated control channel transmission, and demodulating the second carrier to obtain the data channel transmission. Additionally, designs for multi-carrier receivers are provided. | 03-17-2011 |
| 20110111714 | METHOD AND SYSTEM FOR FALSE FREQUENCY LOCK FREE AUTONOMOUS SCAN IN A RECEIVER - Method and system for false lock free autonomous scan in a receiver is disclosed. The method includes identifying a presence of a desired signal to avoid false frequency lock in a Frequency Modulation receiver. The method includes receiving a signal. The method further includes identifying the desired signal, if a first energy is above a first threshold. The method also includes identifying the desired signal, if an Intermediate Frequency count is below a second threshold. The method includes identifying the desired signal, if a second energy of the signal is above a third threshold. The method includes identifying the desired signal, if an absolute difference between a first Received Signal Strength Indication (RSSI) value and a second RSSI value of the signal is below a fourth threshold. The method includes determining a third energy. The method includes identifying the desired signal, if the third energy is below a fifth threshold. | 05-12-2011 |
