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Pulse Or Digital Communications > Equalizers EqualizersEqualizers patent applications listed are from June 2005 to current and include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.11/15/07 - 20070263713 - Digital video interface A circuit includes a first interface to receive a plurality of data streams from a plurality of signal inputs, a multiplexer to interleave the plurality of data streams into a serial data stream, and an output driver, including pre-emphasis circuitry, to transmit the serial data stream on a first output. ... 11/01/07 - 20070253475 - Adaptive equalization using correlation of edge samples with data patterns An integrated receiver supports adaptive receive equalization. An incoming bit stream is sampled using edge and data clock signals derived from a reference clock signal. A phase detector determines whether the edge and data clock signals are in phase with the incoming data, while some clock recovery circuitry adjusts the ... 10/11/07 - 20070237218 - Apparatus and method for ultra narrow band communications A method and apparatus for transmitting information combining abrupt phase change modulation with an ultra narrow band filter to remove unnecessary Fourier sidebands, resulting in a single frequency being transmitted to carry data. The method examines and detects the changes in the carrier phase only, after filtering to remove or ... 10/04/07 - 20070230552 - Method of differential-phase/absolute-amplitude qam A method of quadrature amplitude modulation involving encoding phase differentially and amplitude absolutely, allowing for a high data rate and spectral efficiency in data transmission and other communication applications, and allowing for amplitude scaling to facilitate data recovery; amplitude scale tracking to track-out rapid and severe scale variations and facilitate ... 09/20/07 - 20070217496 - Colored noise detection algorithms This invention provides colored noise detection algorithm(s). This colored noise detection algorithm(s) may be implemented with a multi-branch equalizer processing module that enables interference cancellation when colored noise is associated with received radio frequency (RF) bursts. The noise discriminator identifies when the radio frequency (RF) bursts have white noise or ... 08/30/07 - 20070201546 - Equalizer with controllably weighted parallel high pass and low pass filters and receiver including such an equalizer An adjustable equalizer that includes a first branch including a low pass filter (LPF) and having a variable gain (β), and a second branch including a high pass filter (HPF) and having another variable gain (α). Outputs of the branches in response to an input signal are summed to produce ... 08/30/07 - 20070201545 - Equalizer gain control system and method Systems and method for controlling the gain of an equalizer are provided. In these systems and methods, bit errors in a serial data stream received by an equalizer are detected, and the gain of the equalizer is set in response to the detected bit errors in the serial data stream. ... 08/30/07 - 20070201544 - Apparatus for and method of controlling a feedforward filter of an equalizer A method of controlling a feedforward filter of an equalizer includes the steps of generating a complex representation of an output of the feedforward filter and generating a representation of a decision from an output of the equalizer. The complex representation and the decision representation are correlated to obtain a ... 08/09/07 - 20070183489 - Apparatus for decoding a signal and method thereof and a trellis coded modulation decoder and method thereof An apparatus for decoding a signal and method thereof and a TCM decoder and method thereof. The TCM decoder may calculate a branch metric based on path metrics received from a plurality of other TCM decoders. The TCM decoder may be included within a joint TCM decoder which may be ... 08/02/07 - 20070177663 - Data-dependent jitter pre-emphasis for high-speed serial link transmitters In the context of high-speed serial links, data-dependent jitter compensation techniques performed using phase pre-distortion. Broadly contemplated is an expansion of the notion of pre-emphasis beyond conventional amplitude compensation of ISI, whereby phase pre-emphasis for compensating data-dependent jitter (DDJ) is introduced. DDJ can be addressed by exploiting the relationship between ... 07/05/07 - 20070153888 - Dtv receiver and method of processing broadcast signal in dtv receiver A DTV receiver includes a tuner, a demodulator, a known sequence detector, and a frequency domain equalizer. The tuner initially receives a broadcast signal including valid data in which a known data sequence is periodically repeated. The demodulator demodulates the broadcast signal, and the known sequence detector detects the known ... 06/21/07 - 20070140328 - Complex coefficient transversal filter and complex frequency converter A complex coefficient transversal filter using a SAW filter and a complex frequency converter using the complex coefficient transversal filter are provided, in which a first SAW filter receives a real signal as an input signal and generates a real component of a complex signal, and a second SAW filter ... 06/14/07 - 20070133669 - Method and system for equalization of a replacement load A system (10) and method (50) of equalizing an audio signal from an existing radio or head unit (30) using an interface unit (10) between the radio or head unit and a replacement load (34) can include the steps analyzing (64) an existing equalization to provide a measure of an ... 06/07/07 - 20070127563 - On-line step-size calculation using signal power estimation and tone grouping of the frequency-domain equalizer for dmt-based transceiver An efficient method for calculating the step-sizes for a frequency-domain equalizer of a discrete-multitone communications system using signal power estimation and tone grouping (SPE-TG) while on-line. The SPE-TG method is used to calculate a plurality of subchannel step-sizes which are then stored in a lookup table. When on-line, the method ... 05/31/07 - 20070121716 - Novel transmitter architecture for high-speed communications A transmitter architecture includes an equalizer and a D/A converter, for high-speed transmission of data across a channel. The equalizer includes a two-tap MAC as part of an N-stage, two-way interleaved FIR filter. The two-tap MAC provides substantial power and area savings over conventional MAC-based FIR filter designs, and may ... 05/24/07 - 20070116107 - System and method for adaptive multi-rate (amr) vocoder rate adaptation The present invention includes a time-division-multiple-access (TDMA) communication system having a base station and at least one mobile station, each transmitting and receiving an analog radio-frequency signal carrying digitally coded speech. The speech is encoded using a vocoder which samples a voice signal at variable encoding rates. During periods when ... 05/17/07 - 20070110147 - Equalizing a signal for transmission Equalizing a signal includes receiving a data sequence signal having an amplitude. An adjustment of the data sequence signal operable to equalize the data sequence signal is determined. A control signal operable to adjust the amplitude of the data sequence signal in accordance with the adjustment is generated, where the ... 05/10/07 - 20070104261 - Filter equalization using magnitude measurement data A filter equalization technique for an analog signal path, such as in an instrument that simultaneously measures a signal over a band of frequencies, uses magnitude measurement data for high frequency bands for which phase-calibrated sources are not readily available. A sinusoidal signal source together with an accurate power meter ... 04/26/07 - 20070091992 - High-speed adaptive interconnect architecture with nonlinear error functions A low cost and high speed equalizing receiver structure is provided for improved inter-chip and inter-module communications. The receiver is able to recover data from a corrupted waveform from a signal wire such as one found on data, address or control wires in a microsystem architecture. The receiver can be ... 04/05/07 - 20070076791 - Approximate cholesky decomposition-based block linear equalizer A block linear equalizer (BLE) using an approximate Cholesky decomposition is disclosed. The BLE includes channel estimators, a channel monitor unit, a noise power estimator, a parameter selection unit and an approximate Cholesky processor. The channel estimator generates a channel estimate vector from received samples. The channel monitor unit generates ... 03/29/07 - 20070071085 - Noise filter and filtering method A noise filter, used for a digital signal, configuring an [N−1]-stage filter by connecting the N-number of flip flops in series comprises a selection unit for outputting a filter output signal by selecting one of signals filtered by one to (N−1) stages based on a selection signals; and a wave ... 03/29/07 - 20070071084 - Programmable digital equalization control circuitry and methods Equalization circuitry may be used to compensate for the attenuation of a data signal caused by a transmission medium. The control circuitry for the equalization circuitry may generate control inputs for equalization stages that control the amount of gain provided to the data signal. A comparator may determine whether the ... 03/29/07 - 20070071083 - Equalizing a transmitter In one embodiment, the present invention includes a method for associating a first plurality of current sources with a first tap coefficient and associating a second plurality of current sources with a second tap coefficient. A first plurality of output switches coupled to the first plurality of current sources is ... 03/22/07 - 20070064786 - Equalizer and equalization method There is provided an equalizer that includes: a first extracting circuit extracting a plurality of pilot symbols from an inputted signal; an inverse Fourier transform circuit inversely Fourier transforming the extracted plurality of pilot symbols, and computing a complex gain per path; a second extracting circuit extracting a plurality of ... 03/01/07 - 20070047636 - High speed line equalizer and method thereof The present invention relates to a high speed line equalizer and a method thereof. The high speed line equalizer receives and amplifies one clock signal and at least more than one data signal. The high speed line equalizer comprises an input buffer, a first filter, at least more than one ... 03/01/07 - 20070047635 - Signaling system with data correlation detection Conditionally updating equalization tap weights within an equalized signaling system based on a measure of correlation that indicates a difference between the number of received data values that have matching bits at a first pair of predetermined bit positions, and the number of received data values that have non-matching bits ... 02/15/07 - 20070036210 - Joint space-time optimum filters (jstof) with at least one antenna, at least one channel, and joint filter weight and cir estimation A mobile wireless communications device may include a portable housing, at least one virtual antenna carried by the portable housing, and a space-time filter circuit carried by the portable housing for filtering a communications signal received by the at least one virtual antenna by jointly estimating space-time filter weights and ... 02/01/07 - 20070025435 - Current-controlled cmos (c3mos) fully differential integrated wideband amplifier/equalizer with adjustable gain and frequency response without additional power or loading Current-controlled CMOS (C3MOS) fully differential integrated wideband amplifier/equalizer with adjustable gain and frequency response without additional power or loading. A novel approach is presented by which adjustable amplification and equalizer may be achieved using a C3MOS wideband data stage. This may be referred to as a C3MOS wideband data amplifier/equalizer ... 02/01/07 - 20070025434 - Macro diversity equalization system and method An equalization system and method which supports macro diversity as well as large delay spread channels with a minimal increase in complexity is disclosed. The equalization system includes a path searcher, an optional search scheduler, a multi-equalizer manager, an alignment buffer, a plurality of equalizers and an equalizer combiner. The ... 01/18/07 - 20070014344 - Programmable receiver equalization circuitry and methods Data signals transmitted over transmission media suffer from attenuation caused by the transmission media. Equalization circuitry may be provided to compensate for attenuation caused by the transmission media. Equalization circuitry may include multiple stages arranged in series to allow the frequency responses of the stages to aggregate together. Each stage ... 01/11/07 - 20070009023 - Equalizer and equalizing method Filtering part 50 performs filtering by converting a received signal sampled using a predetermined number of over-samples to an over-sample number small enough to avoid frequency-domain foldover noise generation. Transmission channel estimation part 60 performs path timing detection by converting the received signal sampled using a predetermined number of over-samples ... 01/11/07 - 20070009022 - Signal processing task scheduling in a communication apparatus A communication apparatus includes a radio frequency (RF) circuit configured to operate on an RF signal, and a digital processing circuit that is coupled to the RF circuit. The digital processing circuit may operate in association with the RF circuit according to a time domain isolation technique. In addition, the ... 01/04/07 - 20070002942 - Equalization circuit An equalization circuit that allows particularly for lowpass filtering by transmission lines comprises a compensating equalizer controlled according to whether the edges between bits in the data waveform are early or late. Adjusting the equalization causes edges to appear in the same place, whereas if the adjustment is incorrect certain ... 01/04/07 - 20070002941 - System and method for performing adaptive phase equalization An equalization circuit includes a detector to detect at least one bit pattern on a signal line and a transmit offset circuit to determine a phase-shift setting corresponding to the bit pattern detected by the detector. The phase-shift setting controls a delay in transmission of data on the signal line ... 12/28/06 - 20060291550 - Method and system for equalizing received signal in communications systems A communications system comprises a carrier recovery module that determines a carrier frequency offset of an input signal. A rotator module rotates the input signal to minimize the carrier frequency offset and generates a compensated signal. A correlator module correlates the compensated signal with a unique word to obtain a ... 12/14/06 - 20060280240 - Information read device and read signal processing circuit An optical disk read signal processing system for Blu-ray disc systems to ensure stable phase-locked locked operation even with a low signal-to-noise ratio. This system changes a loop configuration of a phase lock loop circuit according to the operating state, and utilizes a FIR equalizer for phase detection. This system ... 12/07/06 - 20060274826 - Binary rate multiplier configured to generate accurate coefficients A system and method are provided for generating accurate coefficients in a binary rate multiplier by signaling an enabling circuit to generate an enabling signal to the binary rate multiplier such that the average effect of the factored output signal corresponds to a signal multiplied by a predetermined coefficient value; ... 11/30/06 - 20060268972 - Joint space-time optimum filters (jstof) with at least one antenna, at least one channel, and joint filter weight and cir estimation A wireless communications device may include at least one virtual antenna, and a space-time filter circuit for filtering a communications signal received by the at least one virtual antenna by jointly estimating space-time filter weights and at least one channel impulse response (CIR). The wireless communications device may further include ... 11/02/06 - 20060245485 - Continuous-time equalizer A continuous-time equalizer includes a first transconductance circuit to set a gain of an amplified signal in a link and a second transconductance circuit to set a zero frequency in a transfer function of the equalizer. The zero frequency controls a frequency range of the signal amplified in the link ... 09/28/06 - 20060215745 - Direct determination equalizer system A direct determination equalizer system (“DDES”) for compensating for the deterministic effects of a transmission channel and a data source is disclosed. The DDES may include an equalizer having equalizer-tap coefficients, a cross-correlator configured to receive the first sampled signal and an ideal signal and in response produce a cross-correlated ... 09/07/06 - 20060198433 - Colored noise detection algorithms This invention provides colored noise detection algorithm(s). This colored noise detection algorithm(s) may be implemented with a multi-branch equalizer processing module that enables interference cancellation when colored noise is associated with received radio frequency (RF) bursts. The noise discriminator identifies when the radio frequency (RF) bursts have white noise or ... 09/07/06 - 20060198432 - Single antenna interference cancellation within a wireless terminal The present invention provides a multi-branch equalizer processing module operable to cancel interference associated with received radio frequency (RF) burst(s). This multi-branch equalizer processing module includes both a first equalizer processing branch and a second equalizer processing branch. The first equalizer processing branch is operable to be trained based upon ... 08/24/06 - 20060188011 - Automated diagnosis and forecasting of service level objective states Systems, methods, and software used in performing automated diagnosis and identification of or forecasting service level object states. Some embodiments include building classifier models based on collected metric data to detect and forecast service level objective (SLO) violations. Some such systems, methods, and software further include automated detecting and forecasting ... 08/17/06 - 20060182171 - Multistage tuning-tolerant equalizer filter A multistage equalizer filter (100) is presented for compensating a received distorted signal having an amplitude for frequency dependent signal modifications introduced by a transmission channel. The filter (100) comprises at least one amplifying compensation stage (21a, 21b, 21c, 21d) having a gain and a saturation level, the gain being ... 07/13/06 - 20060153286 - Low bit rate codec The present invention relates to improvements of predictive encoding/decoding operations performed on a signal which is transmitted over a packet switched network. The signal is encoded on a block by block basis in such way that a block A-B is predictive encoded independently of any preceding blocks. A start state ... 06/01/06 - 20060114980 - Equalizer and semiconductor device The present invention provides an equalizer and a semiconductor device, that can suppress a decrease in S/N ratio of a reception signal, can facilitate a disconnection test by a direct current signal, and are excellent in reproducibility of a transmission signal. A low-pass filter receives a reception signal supplied from ... 06/01/06 - 20060114979 - Fully parametric equalizer The invention relates to a parametric equalizer comprising filtering means (FM), user interface means (UIM), audio signal input means and audio signal output means, said filtering means comprising at least one filter block (FIB) said user interface means (UIM) facilitating adjustment of corner frequency (fc), Shape (Q) and gain (G), ... 05/11/06 - 20060098726 - Pilot-directed and pilot/data-directed equalizers A normalized least means square (NLMS) equalizer including two equalizer filters is disclosed. In one embodiment, a single correction term generator is used to generate correction terms for tap coefficient updates of each of the equalizer filters based on a pilot signal. In another embodiment, two different correction term generators ... 04/27/06 - 20060088087 - Adaptive equalizer with passive and active stages An equalizer may use a passive input stage to improve linearity and reduce power consumption. In addition, the equalizer may use two gain circuits, one in a high frequency amplification path and the other in an all-pass path. The relative proportion of all-pass to high frequency amplification may be adjusted ... 04/27/06 - 20060088086 - Reverse scaling for improved bandwidth in equalizers An equalizer may use reverse scaling of physical dimensions between a plurality of equalizer stages to improve overall bandwidth. The equalizer may provide 20 dB of peaking at 5 GHz with good linearity and little noise accumulation, using CMOS technology. ... 04/27/06 - 20060088085 - Method and system for equalization of a replacement load A system (10) and method (50) of equalizing an audio signal from a factory installed radio (30) using an interface unit (10) between the factory installed radio and a replacement load (34) can include the steps of measuring (52) an existing equalization for the factory installed radio in the interface ... 03/30/06 - 20060067394 - Wireless device having a hardware accelerator to support equalization processing The present invention provides an equalizer processing module within a wireless terminal having an equalizer interface that receives an incoming baseband signal from a baseband processor operably coupled to the equalizer processing module and outputs soft decisions. A processor or advanced reduced instruction set computer (RISC) machine (ARM) couples to ... 03/30/06 - 20060067393 - Equalizer for a serial data communication receiver An equalizer for a serial data communication receiver includes: a first transistor including a first input terminal, a first output terminal, and a first equalization terminal; a second transistor including a second input terminal, a second output terminal, and a second equalization terminal; a first resistor coupled to the first ... 02/02/06 - 20060023779 - Equalizers, receivers and methods for the same An equalizer may include an equalizer circuit and a controller. The equalizer circuit may generate an equalized signal based on a control code and input data. The controller may generate the control code based on a transition information signal having information on a number of data transitions in each clock ... 01/19/06 - 20060013295 - Multistage tuning-tolerant equalizer filter A multistage equalizer filter is presented that, in case of over-compensation leads to an acceptable low level of additional jitter. It has non-saturating data-nodes and output nodes in each of the amplifying compensation stages, even in the envisaged situations of overcompensation where acceptable additional jitter is specified. Up to an ... 01/12/06 - 20060007996 - Method and system for a fast serial transmit equalization scheme A transmitting device to send an input signal in a channel includes an equalization system. The equalization system includes a decision subsystem to determine when adjustments need to be made based on the frequency of 0s or 1s in the input signal. The equalization system also includes an equalization subsystem ... 01/12/06 - 20060007995 - Apparatus for digital data transmission in state of using mobile telecommunication device and the method thereof Disclosed is an apparatus and a method for digital data transmission by using a mobile communication terminal, including the steps of converting an analog voice signal into a digital signal, the analog voices signal inputted through a microphone; inserting a watermark into the digital voice signal, the watermark including additional ... 12/08/05 - 20050271134 - System and method for equalizing high-speed data transmission According to one embodiment of the present invention, a method for equalizing a signal includes receiving a plurality of in incoming data signals. Each of the plurality of incoming data signals have an associated sequence of data. A delay is introduced into the plurality of incoming data signals to generate ... 11/17/05 - 20050254567 - Transmit amplitude independent adaptive equalizer Transmit amplitude independent adaptive equalizers are provided that compensate for transmission losses in an input signal when the transmit signal amplitude is unknown. Several embodiments are provided, including a first embodiment having an equalizer core, a controllable-swing slicer and an amplitude control loop, a second embodiment having an equalizer core, ... 11/17/05 - 20050254566 - Transmit amplitude independent adaptive equalizer Transmit amplitude independent adaptive equalizers are provided that compensate for transmission losses in an input signal when the transmit signal amplitude is unknown. Several embodiments are provided, including a first embodiment having an equalizer core, a controllable-swing slicer and an amplitude control loop, a second embodiment having an equalizer core, ... 11/17/05 - 20050254565 - Transmit amplitude independent adaptive equalizer Transmit amplitude independent adaptive equalizers are provided that compensate for transmission losses in an input signal when the transmit signal amplitude is unknown. Several embodiments are provided, including a first embodiment having an equalizer core, a controllable-swing slicer and an amplitude control loop, a second embodiment having an equalizer core, ... 11/17/05 - 20050254564 - Graphic equalizers Graphic equalizer as a cascade of equalization filters with the gain of each individual filter compensated for the gain leakage from other filters. A linear approximation allows individual filter gains to be set to give desired frequency responses. ... 10/20/05 - 20050232346 - Device including an equalizer and an amplification chain for broadband integrated circuit applications A device includes an equalizer and an amplification chain in a transmitter or a receiver. The device comprises an equalizer for equalizing an input signal. The equalizer is positioned between two amplifier stages, which amplify the signal. The positioning of the equalizer greatly improves the noise figure and the distortion ... 10/06/05 - 20050220184 - Read channel apparatus and method for an optical storage system A read channel apparatus is disclosed for reading data recorded on an optical storage system at a predetermined baud rate. The apparatus asynchronously samples an analog read signal generating from the optical storage system and subtracts an estimated DC offset from the asynchronous sample values to generate a sequence of ... 10/06/05 - 20050220183 - Apparatus and method for improving quality of received signal An equalizer having an input end and an output end comprises: a first circuit, coupled between the input end and the output end, having a first gain; and a second circuit, coupled between the input end and the output end, having a second gain; wherein a frequency response of the ... 09/15/05 - 20050201454 - System and method for automatically calibrating two-tap and multi-tap equalization for a communications link A method to calibrate an equalizer for communicating signals over a data link between a transmitter and receiver includes measuring loss in the link and automatically determining a multi-tap equalization setting for the transmitter based on the measured loss. The multi-tap equalization setting may be determined using a look-up table, ... 08/25/05 - 20050185709 - Apparatus and method for digitally filtering spurious transitions on a digital signal Embodiments of the invention include a digital filtering apparatus and method for digitally filtering out undesirable or invalid data from data signal lines. The digital filtering apparatus includes a digital delay element having one or more outputs, a comparator operably connected to the outputs of the digital delay element, and ... 08/11/05 - 20050175080 - Equalizer status monitor A system for monitoring the output of an adaptive channel equalizer in order to determine if convergence has been achieved. A slicer samples data from the equalizer during a predetermined period. The output data from the slicer is forwarded to a microprocessor in order to apply a test standard to ... 07/28/05 - 20050163207 - Crosstalk equalizer Apparatus and methods for equalizing the jitter on a communication line attributable to uncorrelated data coupled from one or more data lines in close proximity to the communication line. The crosstalk jitter induced by adjacent data lines can be equalized by detecting one or more data or state transitions in ... 07/28/05 - 20050163206 - Arbitrary waveform synthesizer using a free-running ring oscillator The waveform generator includes a free-running ring oscillator, and algebra module, a switching module and an output module. The free-running ring oscillator includes a plurality of delay elements connected in a loop and a plurality of taps disposed between the delay elements, with each tap providing a uniquely phased, oscillating ... 07/28/05 - 20050163205 - Equalized signal path with predictive subtraction signal and method therefor A digital communication transmitter serves as a signal path (10) which uses an adaptive equalizer (18) in a predistortion role. The adaptive equalizer (18) pre-distorts a complex digital communication signal (12) that need not exhibit any distortion. Subsequent analog distortion-introducing segments (24, 30, 36, 42) then distort a predistorted signal ... 06/30/05 - 20050141604 - Performance fir filter A single bit FIR filter that minimizes computation time by pre-storing outputs or portions of outputs for accumulation and output. ... 06/09/05 - 20050123032 - Equalization for traveling wave tube amplifier nonlinearity measurements A method and system provide the ability to measure a transmission performance characteristic. A signal is received and equalized. The equalized signal is demodulated and an ideal signal is generated from the demodulated equalized signal. A performance characteristic is the estimated from a difference between the ideal signal and the ... ### FreshPatents.com Support - Terms & Conditions |