Patent application number | Description | Published |
20090147836 | METHOD FOR FREQUENCY OFFSET ESTIMATION AND AUTOMATIC FREQUENCY CONTROL FOR FILTERED SIGNAL WITH DESTROYED PHASE INFORMATION AND SIGNAL TRANSCEIVER - The invention provides a method for frequency offset estimation according to a filtered signal with destroyed phase information. In one embodiment, a filter filters an original signal according to a series of first filter coefficients to obtain a first-channel component of the filtered signal, and filters the original signal according to a series of second filter coefficients to obtain a second-channel component of the filtered signal. A series of third filter coefficients are first derived from the first filter coefficients. The original signal is then filtered according to the third filter coefficients to obtain a reference signal. A first frequency offset value is estimated according to the first-channel component of the filtered signal and the reference signal, wherein the first-channel component of the filtered signal is a first-channel component of an artificial signal, and the reference signal is a second-channel component of the artificial signal. | 06-11-2009 |
20090245428 | METHOD AND APPARATUS FOR PROCESSING COMMUNICATION SIGNAL - Methods and apparatuses process a communication signal to detect a burst packet comprising an access code. The method comprises deriving a differential phase signal indicating differential phases of a first set of the access code in the communication signal, and comparing the differential phase signal with an ideal differential phase signal to calculate a frequency offset value, compensating the differential phase signal by the frequency offset value to generate a compensated differential phase signal, and detecting a burst packet transmitted via the communication signal according to the compensated differential phase signal. | 10-01-2009 |
20090310717 | SIGNAL CONVERTERS - A signal converter. The signal converter converts an analog inphase signal and an analog quasdrature phase signal into a digital baseband inphase signal and a digital baseband quadrature phase signal. The analog inphase signal and the analog quadrature phase signal are orthogonal to each other and are carried in a predetermined intermediate frequency. The digital baseband inphase signal and the digital baseband quadrature phase signal are carried in zero frequency. The signal converter comprises a signal combiner combining the analog inphase signal and the analog quadrature phase signal to obtain an analog combined signal, an analog to digital converter converting the analog combined signal to a digital combined signal, and a signal separator separating the digital combined signal to obtain the digital baseband inphase signal and the digital baseband quadrature phase signal. | 12-17-2009 |
20120269292 | RF TRANSMITTER, INTEGRATED CIRCUIT DEVICE, WIRELESS COMMUNICATION UNIT AND METHOD THEREFOR - A radio frequency (RF) transmitter including at least one digital signal processing module is described. The at least one digital signal processing module is arranged to receive a complex digital input signal, successively apply pre-distortion to the received complex digital input signal with a progressively finer granularity, simultaneously progressively increase a sampling rate of the received complex digital input signal, and output a first, in-phase digital control word and a second, quadrature, digital control word for controlling at least one digital power amplifier component to generate an RF signal representative of the received complex digital input signal. | 10-25-2012 |
20130094375 | METHODS AND APPARATUSES FOR DETECTING TRANSMISSION COLLISION AND/OR ALLEVIATING TRANSMISSION COLLISION - A method for detecting a transmission collision between a first wireless communication terminal and a second wireless communication terminal includes the following steps: when one retry packet transmitted from the first wireless communication terminal is received by the second wireless communication terminal, checking if at least one transmission collision condition is met and accordingly generating a checking result; deriving statistic data from a plurality of checking results generated in response to a plurality of retry packets transmitted from the first wireless communication terminal; and detecting the transmission collision between the first wireless communication terminal and the second wireless communication terminal according to the statistic data. | 04-18-2013 |
20140119416 | COMMUNICATION SYSTEM WITH UP-CONVERTER AND DIGITAL BASEBAND PROCESSING CIRCUIT IMPLEMENTED IN ONE DIE SEPARATED FROM ANOTHER DIE HAVING DOWN-CONVERTER, AND RELATED COMMUNICATION METHOD THEREOF - One communication system includes a first die, a second die and a front-end circuit. The first die has an up-converter and a digital baseband (DBB) processing circuit. The second die has a down-converter. The front-end circuit couples an antenna to the first and second dies. Another exemplary communication system includes a first die, a second die and a front-end circuit. The first die performs digital baseband (DBB) processing, and generates a first signal with a higher frequency according to a second signal, wherein the second signal is derived from an output signal of the DBB processing. The second die generates a third signal with a lower frequency according to a fourth signal. The front-end circuit couples the first signal from the first die to an antenna and couples the fourth signal from the antenna to the second die. | 05-01-2014 |
20140293969 | UTILIZATION OF REDUNDANT INDICATION FIELD - A method of utilizing same indication fields of time slots for different purposes includes: transmitting an indication signal in an indication field of at least one first time slot on a dedicated physical channel (DPCH); and transmitting at least one known symbol in an indication field of at least one second time slot on the DPCH, wherein the known symbol is arranged for estimating channel characteristics. | 10-02-2014 |
20140314184 | WIRELESS TRANSMITTER FOR MULTI-MODE CONCURRENT TRANSMISSION OF SIGNALS COMPLYING WITH DIFFERENT COMMUNICATION STANDARDS - A wireless transmitter has a digital baseband module and a radio-frequency (RF) transmitter. The digital baseband module generates a multi-mode modulated signal by using a plurality of digital synthesizers. The RF transmitter has a frequency synthesizer and a digital power amplifier (DPA). The frequency synthesizer generates an oscillation signal with an RF carrier frequency. The DPA generates a multi-standard RF signal according to the multi-mode modulated signal and the oscillation signal. | 10-23-2014 |