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| Number | Title | Issue Date |
| RE43402 | Adaptive adjustment of time and frequency domain equalizers in communications systems An update mechanism and approach are provided for configuring a communications receiver. According to the approach, a time domain equalizer and a frequency domain equalizer in a communications receiver are dynamically updated based upon performance data that indicat... | 05/22/2012 |
| 8184754 | Spur mitigation techniques Spurs cause significant problems with signal detecting, amplifier gain adjustment, and signal decoding. Various techniques can be used to mitigate the effects of spurs on a received signal. Generally, these techniques work by either canceling or ignoring the spurs. ... | 05/22/2012 |
| 8184753 | Apparatus and method for OFDM channel equalization An apparatus and method for orthogonal frequency division multiplexing (OFDM) channel equalization are disclosed. The apparatus includes a compensation value setting unit setting a compensation value in the form of a diagonal matrix by use of a diagonal matrix of di... | 05/22/2012 |
| 8175204 | Receiving device, signal processing method, and program A receiving device includes: a pilot extracting section; a first estimating section; a second estimating section; a third estimating section; a distortion correcting section; and a filter controlling section. ... | 05/08/2012 |
| 8175202 | Receiver with clock drift compensation A receiver is described including circuitry for deriving at least a first stream of first digitized samples from a received analog signal at a first sampling rate, circuitry for selecting a first sampling point and at least a second sampling point, a demodulator for... | 05/08/2012 |
| 8175203 | Broadcast channel estimator A communication system comprises a receiver, which may generate broadcast coefficients that represent the characteristics of a channel using the channel information encoded in the segment synchronization units. The receiver may also use the channel information encod... | 05/08/2012 |
| 8165251 | Interpolation IIR filter for OFDM baseband processing A filter for receiver and operative on a stream of OFDM symbols has a symbol timing identifier which indicates the time interval for each symbol and also indicates a non-truncation interval and a truncation interval of the stream of symbols. The stream of OFDM symbo... | 04/24/2012 |
| 8160190 | IIR receive filter for OFDM baseband processor A receive filter for a stream of OFDM symbols has an infinite impulse response (IIR) filter which receives packets having a preamble part followed by a data part, the data part having a succession of cyclic prefixes followed by OFDM symbols. The packet is provided t... | 04/17/2012 |
| 8160189 | Method and system for communication channel characterization In accordance with the present invention, a method of processing a signal is described that includes receiving a signal having an encoded digital packet, wherein the digital packet includes packet data and a packet frame, wherein the packet frame includes a common d... | 04/17/2012 |
| 8160191 | Correction of quadrature errors Embodiments of the invention are concerned with correction of quadrature errors associated with digital communications systems, and in particular in a wireless transmit chain in which an up-converter and a down-converter both have a direct conversion architecture. O... | 04/17/2012 |
| 8155255 | Method for estimation of signal frequency and displacement estimation method and device with consistency check, period prediction and compensation, and/or adaptive threshold update A displacement estimation method is disclosed which includes: a signal capturing step for capturing a signal; a displacement estimation step for calculating a displacement based on a state change of the signal; and an output step for outputting the displacement, in ... | 04/10/2012 |
| 8135102 | Method and apparatus for digitally equalizing a signal in a distributed antenna system Systems and methods for digitally equalizing a signal in a distributed antenna system are provided. In one embodiment, a signal processing device within a distributed antenna system comprises a signal path within a signal processing board, the signal path having an ... | 03/13/2012 |
| 8135100 | Adaptive clock and equalization control systems and methods for data receivers in communications systems Systems and methods for adaptive clock and equalization control are provided for data receivers, which are based on a “closed loop” sampling clock framework that employs controllable and dynamically adapted time offsets on both local data and amplitude clocks. T... | 03/13/2012 |
| 8135101 | Data equalisation in a communication receiver wth transmit and receive diversity A method of performing data equalization in a communication receiver with transmit and receive diversity includes (a) for each i-th receiver antenna and j-th transmitter antenna, calculating a channel response matrix Hi,j from multi-path channel estimates... | 03/13/2012 |
| 8130882 | Radio receiver having a multipath equalizer A radio receiver has a multipath equalizer that includes a filter and a coefficient estimator. The filter provides a reconstructed signal by applying a transfer function including a reflection coefficient and a delay coefficient to a multipath radio signal. The coef... | 03/06/2012 |
| 8130881 | MIMO with reduced compute complexity Systems, methods, and devices for MIMO communications with reduced compute complexity are disclosed. Spectrally whitened communications are received, magnitude distortion is removed and phase distortion is corrected. The magnitude distortion is removed separately fr... | 03/06/2012 |
| 8130880 | Wideband digital spectrometer A method for reducing interference, comprising receiving a wideband signal, having at least one large amplitude component; adaptively modifying the wideband signal with respect to at least one high intensity component without substantial introduction of non-linear d... | 03/06/2012 |
| 8126099 | Apparatus, and associated method, for filtering a receive signal by adaptive operation of an input noise whitening filter Apparatus, and an associated method, for the receive part of a receiving station, such as a mobile station or other transceiver of a cellular communication system. Selection is made of filter characteristics to be exhibited by an adaptive, input noise whitening filt... | 02/28/2012 |
| 8121236 | Communications system using adaptive filter circuit using parallel adaptive filters A communications system receives a modulated communication signal that carries encoded communications data. A signal input receives the communication signal. An adaptive filter circuit is connected to the signal input and comprises N number of parallel adaptive filt... | 02/21/2012 |
| 8111793 | System and method for adjacent channel power detection and dynamic bandwidth filter control A system for detecting and minimizing interference in a radio receiver includes a plurality of bandpass filters having different response characteristics, a power detector configured to compare a power output of a first bandpass filter and a second bandpass filter, ... | 02/07/2012 |
| 8111792 | Apparatus and methods for digital adaptive equalizer in serial receiver Circuits and methods for performing adaptive frequency compensation in a serial receiver coupled to a differential signal channel link are disclosed. In an exemplary embodiment, a receiver for signals over a serial channel link is provided including a linear equaliz... | 02/07/2012 |
| 8111791 | Differential evolution design of polyphase IIR decimation filters A method for designing a digital filter, includes: (a) selecting a predetermined number of current sets of coefficients for the digital filter; (b) selecting a metric for evaluating coefficients of the digital filter; (c) computing a metric for each current set of c... | 02/07/2012 |
| 8107573 | Method and apparatus for baseline wander compensation in Ethernet application An embodiment of the proposed invention is primarily applied to compensate the BLW in communication systems using THPs in their transmitters, especially suitable for the 10GBase-T Ethernet application. The present apparatus includes an additional decision device (sl... | 01/31/2012 |
| 8107571 | Parameterized filters and signaling techniques Filter taps for filters are specified by filter coefficient parameters. The filter taps are greater in number than the coefficient parameters from which the filter taps are calculated. For example, two coefficient parameters are used to specify a four-tap filter. Fi... | 01/31/2012 |
| 8107572 | Communications system using adaptive filter for interference reduction A communications system receives a modulated signal that carries encoded communications data. An adaptive filter circuit has a plurality of adaptive filters each having a plurality of non-adaptive and adaptive filter taps with weighted coefficients. At a selected ad... | 01/31/2012 |
| 8107574 | Filter tuning circuit for wireless communication system A filter tuning circuit for a wireless communication system is provided. A filter tuning circuit includes a comparator and a counter which control a transconvertance value of a differential transconverter to tune a filter. ... | 01/31/2012 |
| 8098781 | Communications system using adaptive filter with normalization circuit A communications system receives a modulated signal that carries encoded communications data. An adaptive filter has a plurality of non-adaptive and adaptive filter taps with weighted coefficients and a input and output normalizing circuit that obtain sample values ... | 01/17/2012 |
| 8098782 | Communications device including a filter for notching wideband receive signals and associated methods A communications device includes pre-processing circuitry for processing a received wideband complex signal including an undesired narrowband interference component therein, and for determining a frequency of the undesired narrowband interference component. A filter... | 01/17/2012 |
| 8094763 | Communications system using adaptive filter with adaptive update gain A communications system receives a modulated signal that carries encoded communications data. An adaptive filter has a plurality of non-adaptive and adaptive filter taps with weighted coefficients and an adaptive gain circuit for updating the adaptive gain of the ad... | 01/10/2012 |
| 8085890 | Apparatus and method for base band filtering Disclosed is a base band filter apparatus and a method for base band filtering comprising filtering a base band signal in time domain, said filtering including a filter transfer function (F), wherein the base band signal is provided in frequency domain, the frequenc... | 12/27/2011 |
| 8081722 | Communications system and device using simultaneous wideband and in-band narrowband operation and related method A communications device includes a signal input for receiving both wideband and in-band, narrowband communication signals having wideband communications data that is transmitted over a wideband communications channel and narrowband communications data that is transm... | 12/20/2011 |
| 8077819 | Search engine for a receive equalizer A search engine selects initial coefficients for a receive equalizer. The search engine may be incorporated into a communication receiver that includes a decision feedback equalizer and clock and data recovery circuit. Here, the search engine may initialize various ... | 12/13/2011 |
| 8077817 | Arrangement for adaptive bit recovery The present invention relates to an arrangement for adaptive bit recovery, and to an apparatus for reading from and/or writing to recording media using such arrangement. According to the invention, an arrangement for adaptive bit recovery including an adaptive equal... | 12/13/2011 |
| 8077818 | Radio receiver A radio receiver including a reception processing system that uses discrete-time frequency conversion to acquire a signal having a sampling rate corresponding to a local frequency, wherein the reception characteristic is improved when the reception processing system... | 12/13/2011 |
| 8073088 | Method and communication device for interference cancellation in a cellular TDMA communication system A system and method for interference cancellation of received data via a communication channel in a cellular communication system having corresponding channel impulse response coefficients. Linear filtering of the received data is performed and thereafter a non-line... | 12/06/2011 |
| 8064556 | Fractionally-spaced equalizers for spread spectrum wireless communication This disclosure describes equalization techniques for spread spectrum wireless communication. The techniques may involve estimating a channel impulse response, estimating channel variance, and selecting filter coefficients for an equalizer based on the estimated cha... | 11/22/2011 |
| 8059772 | Filter and method for suppressing effects of adjacent-channel interference A filter device and method for suppressing effects of Adjacent-Channel Interference of a received signal in a Frequency-Division-Multiple-Access system by filtering a baseband signal of the received signal. The filter device comprises an interference filter, which i... | 11/15/2011 |
| 8059773 | Channel equalization in receivers Apparatus and methods relating to channel equalization include a method including: generating a first output signal in a frequency domain based on a communications signal of a channel; determining a first channel response based on the first output signal and one or ... | 11/15/2011 |
| 8054924 | Data transmission method with phase shift error correction A data transmission method with phase shift error correction comprising: transmitting through a network a transmission signal, wherein the transmission signal comprises a reference signal component having a predetermined frequency and a data signal component; receiv... | 11/08/2011 |
| 8050370 | Digital signal receiving apparatus A digital signal receiving apparatus includes a detection-judging portion having a first smoothing filter generating a first smoothed signal by smoothing an auto-correlation signal and judging a possible presence of a desired signal when a signal level of the first ... | 11/01/2011 |
