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Pulse Or Digital Communications > Equalizers > Automatic > Adaptive

Adaptive

Adaptive patent applications listed include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.

07/24/14 - 20140204991 - Inter symbol interference reduction by applying turbo equalization mode
The present disclosure relates to a receiving node, and to a related method for determining when to apply a turbo equalization mode to compensate for Inter-Symbol Interference in a radio signal received over a radio channel from a transmitting node. The method comprises decoding the received radio signal into a...

07/10/14 - 20140192853 - Apparatus and method for iterative interference cancellation in a wireless communication network
One or more aspects of the disclosure provide an efficient equalization scheme capable of mitigating multi-path interference on channels with large delay spread using short-length equalizers. That is, by dividing stored samples of a signal received on the multi-path channel by time into a plurality of clusters, a short-length equalizer...

07/10/14 - 20140192854 - Receiver apparatus, method for processing received signal and computer program product
A reception apparatus includes: a Fourier transform unit to output a converted signal; a propagation path estimation unit to calculate propagation-path-estimated-values based on pilot subcarriers; and a propagation path compensation unit, including a filter, to compensate propagation path distortion, the filter includes: first multipliers to multiply the propagation-path-estimated-values of taps...

07/10/14 - 20140192855 - Adaptive equalizer
An adaptive equalizer capable of suppressing an increase in circuit scale and an increase in operation clock frequency. An adaptive equalizer (100) performs an adaptive equalization process on a time-region signal in a frequency region. A signal converter (200) has: a first wide-bit memory (201) capable of reading/writing a plurality...

07/03/14 - 20140185661 - High speed receivers circuits and methods
The present invention provides GPA embodiments. In some embodiments, a GPA stage with a negative capacitance unit is provided....

07/03/14 - 20140185662 - Methods and arrangements for phase tracking for multi-mode operation in wireless networks
Logic may comprise a single phase tracking implementation for all bandwidths of operation and the logic may adaptively change pre-defined and stored track parameters if the receiving packet is 1 MHz bandwidth. Logic may detect a packet and long training fields before performing a 1 MHz classification. Logic may auto-detect...

06/26/14 - 20140177696 - Receiver circuit with de-emphasis function
A receiver circuit includes a first differential amplification unit including a variable load section, and configured to receive first and second input signals, and to generate first and second output signals, which are amplified based on an impedance value of the variable load section and a voltage difference between the...

06/19/14 - 20140169434 - Method and apparatus for phase noise mitigation
An approach is provided to mitigate phase noise by correcting common phase error and inter-carrier-interference in a received signal. The approach involves determining a received signal includes phase noise comprising at least a common phase error component and an inter-carrier-interference component. The approach also involves causing the common phase error...

06/19/14 - 20140169435 - Device and method for correcting duty cycle, and receiver including the same
A duty cycle correcting device is provided which includes a pulse width adjusting unit which adjusts a pulse width of an input signal according to a pulse width control code; a comparison unit which compares an output signal of the pulse width control unit with a plurality of reference voltages;...

06/19/14 - 20140169436 - Modulation and equalization in an orthonormal time-frequency shifting communications system
A system and method of providing a modulated signal useable in a signal transmission system. The method includes transforming, perhaps with respect to both time and frequency, a data frame including a plurality of data elements into a transformed data matrix. The transformed data matrix includes a plurality of transformed...

06/19/14 - 20140169437 - Modulation and equalization in an orthonormal time-frequency shifting communications system
A method for modulating data for transmission within a communication system. The method includes establishing a time-frequency shifting matrix of dimension N×N, wherein N is greater than one. The method further includes combining the time-frequency shifting matrix with a data frame to provide an intermediate data frame. A transformed data...

06/19/14 - 20140169438 - Receiver with clock recovery circuit and adaptive sample and equalizer timing
A receiver is equipped with an adaptive phase-offset controller and associated timing-calibration circuitry that together shift the timing for a data sampler and a digital equalizer. The sample and equalizer timing is shifted to a position with less residual inter-symbol interference (ISI) energy relative to the current symbol. The shifted...

06/12/14 - 20140161170 - Feed forward equalization for highly-spectrally-efficient communications
A receiver may be operable to receive a signal. A sequence estimation module of the receiver may generate estimated symbols corresponding to the received signal. The generating of the estimated symbols may use tap information associated with one or both of a pulse shaper via which the signal was transmitted...

06/05/14 - 20140153631 - Methods and circuits for asymmetric distribution of channel equalization between devices
A transceiver architecture supports high-speed communication over a signal lane that extends between a high-performance integrated circuit (IC) and one or more relatively low-performance ICs employing less sophisticated transmitters and receivers. The architecture compensates for performance asymmetry between ICs communicating over a bidirectional lane by instantiating relatively complex transmit and...

05/22/14 - 20140140387 - Systems and methods for adaptive blind mode equalization
A blind mode adaptive equalizer system to recover the in general complex valued data symbols from the signal transmitted over time-varying dispersive wireless channels is disclosed comprising an adaptive communication receiver for the demodulation and detection of digitally modulated signals received over wireless communication channels exhibiting multipath and fading, the...

05/15/14 - 20140133543 - Method and apparatus for antenna array calibration using traffic signals
An antenna array of a base station is calibrated using outbound traffic signals. The outbound traffic signals are captured for use as reference signals before the outbound traffic signals enter transmit paths in a radio unit of the base station. The outbound traffic signals are captured for use as a...

05/08/14 - 20140126623 - Equalizing method and device for a non-linear transmission channel
In a second step (120), for each symbol to be equalized, for each branch, a branch metric is calculated as a distance between the observable corresponding to the modulation symbol to be equalized and the observable stored for said branch....

05/08/14 - 20140126624 - Low-amplitude echo estimation for a received communication signal
A system and method for identifying minor echoes present in an input signal in the situation where a set of major echoes has already been identified from the input signal. The method includes: computing a spectrum F corresponding to a sum of the major echoes; computing a weighted power spectrum...

05/01/14 - 20140119423 - Active and programmable hdmi cable & method
A method for optimizing the performance of an active HDMI cable. An active cable compensator is provided within the HDMI cable itself. This device applies an individually-adjusted equalizer to each of the TMDS video data lines. A non-equalizing amplifier is applied to the two TMDS clock lines. An accelerator is...

05/01/14 - 20140119424 - Feed-forward equalization in a receiver
Embodiments are directed to feed-forward equalization. In some embodiments, a first circuit is configured to receive a signal transmitted over a channel as a differential pair, and a second circuit is configured to mirror the signal as at least a pre-cursor component comprising a first transistor of a first type...

05/01/14 - 20140119425 - Programmable hdmi cable & method including external programmer
A method for optimizing the performance of an active HDMI cable. An active cable compensator is provided within the HDMI cable itself. The parameters controlling each of the active components (such as parameters setting gain and frequency distribution) within an individual HDMI cable are set through a programming process. The...

04/24/14 - 20140112381 - Dm-cm diversity receiver for a wireline communication system
In general, the present invention provides methods and apparatuses for exploiting the extra degree of freedom provided by the sensing of the CM signal along with the DM signal at the receiver end of a wireline communication system. According to certain aspects, this extra degree of freedom can be used...

04/17/14 - 20140105266 - Adaptive maximum a posteriori (map) detector in read channel
An adaptive detector, such as a maximum a posteriori (MAP) detector for a read channel, is disclosed. In one or more embodiments, a data processing apparatus, such as a read channel digital front end, includes an equalizer configured to equalize X sample data to yield equalized Y sample data. A...

04/17/14 - 20140105267 - Signal reception using non-linearity-compensated, partial response feedback
A receiver may receive a signal that was generated by passage of symbols through a non-linear circuit. An equalizer of the receiver may equalize the received signal based on a first non-linearity compensated, inter-symbol correlated (ISC) feedback signal to generate an equalized signal. The receiver may correct a phase error...

03/27/14 - 20140086298 - Data-dependent equalizer circuit
A data dependent equalizer circuit includes a plurality of noise prediction filters. Respective ones of the noise prediction filters are configured to filter noise in sample data for at least one predetermined non-return to zero (NRZ) condition. A plurality of equalizers is communicatively coupled with the plurality of noise prediction...

03/27/14 - 20140086299 - Frequency domain equalization for wireless communication
Some demonstrative embodiments include devices, systems and/or methods of equalizing received wireless communication signals. For example, a device may include a pre-decoding equalizer to determine a plurality of filter weights by applying both a blind-equalization and a least-mean-squares (LMS) equalization to a wireless communication signal received over a wireless communication...

03/13/14 - 20140072024 - Carrier recovery in amplitude and phase modulated systems
A method is provided. A multi-amplitude signal is received and downconverted so as to generate I and Q signals using a local oscillator signal. The I and Q signals are equalized, and the equalized I and Q signals are digitized. First and second gains are adjusted with the second and...

03/13/14 - 20140072025 - Transmission apparatus and communication system
A transmission apparatus includes a transmission equalizer that equalizes a transmission signal transmitted in a signal transmission performed via a non-contact coupling including a magnetic coupling of a pair of coupling elements. The transmission equalizer creates plural equivalent transmission signals by branching the transmission signal; and includes plural signal paths...

03/13/14 - 20140072026 - Mechanism for performing equalization without prior knowledge of modulation type or constellation order
A system, method and memory medium for performing blind equalization. A block {un} of the baseband samples is received. A function J of a vector f is minimized to determine a minimizer fMIN. The function J depends on vector f according to J(f)=Σ(...

03/06/14 - 20140064350 - Noise power thresholding and balancing for long term evolution (lte) symbol detection
A noise thresholder of a baseband modem integrated circuit (BMIC) compares measured noise variances on corresponding receiver paths to a pre-established threshold minimum value. The noise thresholder assigns as a noise variance value for a corresponding receiver path either (a) a measured noise variance value for each receiver path having...

03/06/14 - 20140064351 - Adaptive control of low-frequency equalizers
A method includes, by a detector, receiving from a low frequency equalizer a data signal and an error signal, matching a tail portion of the data signal to a tail portion of an extended filter-pattern, and, based upon the error signal at a given location of the data signal and...

02/27/14 - 20140056343 - Distortion-compensated rf transmitter and method therefor
An RF transmitter (10) includes an RF amplifier (28) that generates an amplified RF signal (36) including a linear RF signal (92) and a spurious baseband signal (94). The spurious baseband signal (94) interacts with bias feed networks (56, 66) to cause the RF amplifier (28) to generate an unwanted...

02/20/14 - 20140050259 - Methods and arrangements for phase tracking in wireless networks
Logic may determine phase correction information from pilot tones. Logic may determine phase correction information from some of the pilot locations. Logic may process the shifting pilot tones for less than all of the pilot tones. Logic may process pilot tones at any location within orthogonal frequency division multiplexing (OFDM)...

02/13/14 - 20140044160 - Signal processor, electronic apparatus, method of signal processing, and computer-readable recording medium
A signal processor includes a receiver to receive data to be transmitted to an external device, a signal generator to process de-emphasis of the received data using a preset de-emphasis value and to output the resultant data to the external device, an information acquisition unit to receive equalizer information from...

02/06/14 - 20140036983 - Equalization device, reception device and equalization method
This equalization device and method, while preventing an expansion of circuit size, enable high-speed detection of a CIR in order to effectively achieve frequency domain equalization even when the phase of the received signal is significantly different from the phase of the known signal, and when the transmission channel has...

01/30/14 - 20140029660 - Method and apparatus for sparse polynomial equalization of rf receiver chains
A radio frequency (RF) receiver includes an analog receiver chain followed by digital circuitry for reducing nonlinear distortion components within an output signal of the analog receiver chain. In at least one embodiment, the digital circuitry includes a digital equalizer that is configured with a sparse set of Volterra series...

01/30/14 - 20140029661 - Reception device and reception method
The present technique relates to a reception device and a reception method which can improve equalization performance. An equalization processing unit has a time domain equalization unit which equalizes a received signal in a time domain and a frequency domain equalization unit which is provided in parallel to the time...

01/23/14 - 20140023131 - Methods and apparatus for adapting transmitter equalization coefficients based on receiver gain adaptation
Methods and apparatus are provided for adapting transmitter equalization coefficients based on receiver gain adaptation. Equalization coefficients of a transmitter that communicates over a channel with a receiver are adapted by determining if a gain value for an amplifier in the receiver is within a limit of the amplifier; and...

01/23/14 - 20140023132 - Communications with adaptive equalization
Signal equalization is facilitated in a manner that provides for feedback operation with desirable equalization operation. As consistent with one or more embodiments, a sign is assigned to received signals by generating an output that is an absolute value of the received signals, and a comparator processes the output and...

01/23/14 - 20140023133 - Adaptive equaliser with asynchronous detection and inhibit signal generator
Generating updated coefficients for an adaptive equaliser involves generating phase tracking information using asynchronous detection strategy (ADS) based on resolved data, and equalised signals, and estimating a phase corrected error based on the equalised signals, the phase tracking information and the resolved data. An inhibit signal is generated to inhibit...

01/16/14 - 20140016688 - Equalizer and detector arrangement employing joint entropy-based calibration
An equalizer configured to receive a data signal from a channel. The detector is coupled to the equalizer, and a calibration unit is coupled with the equalizer and the detector. The calibration unit is configured to jointly calibrate the equalizer and the detector using a metric subject to an entropy-preserving...

01/16/14 - 20140016689 - Apparatus and method for improving the performance of a linear equalizer with multiple receive antennas
Disclosed are methods and apparatus for initializing an equalizer in a diversity receiver. In one aspect, the initialization includes estimating a channel impulse response (CIR) for each receiver chain of the diversity receiver; determining noise power estimates for each receiver chain based on the CIRs; and adaptively adjusting equalizer taps...

01/16/14 - 20140016690 - Method of reducing signal imbalance in wireless communication system
Multiplier coefficients are updated according to minimal power value of mixed signals in a wireless communication system. While using updated multiplier parameters, signal imbalance caused by a local oscillator or mismatch between analog elements of the wireless communication system can be reduced, so that the wireless communication system can be...

01/16/14 - 20140016691 - Adaptive interference suppression using interference power measurements
Systems and methods are disclosed for interference suppression in a mobile device (MS). In certain embodiments, the MS uses handover measurements to detect and measure the interference powers of neighbor cells and sorts them with respect to their power levels. An RSRP ratio of serving cell RSRP to neighbor cell...

01/02/14 - 20140003484 - Pre-equalizer for a digitally modulated rf signal and method
multiplying a previous symbol of the input stream (x(n−1)) with a previous adjusting real number (a(n−1)), said previous symbol being received directly before said next symbol of the input stream, and computing the next symbol of the equalized stream from the multiplied next symbol of the input stream and the...

12/19/13 - 20130336377 - Iterative equalization with non-linear soft interference cancellation in non-linear satellite channels
A method for removing distortions in a transmitted signal transmitted by a high power amplifier in a satellite communications system. The method characterizes the high power amplifier to define a series of Volterra coefficients and uses those coefficients in an equalizer in a receiver in the communications system to remove...

11/28/13 - 20130315289 - Multiple synchronous iq demodulators
A system for synchronizing IQ demodulators includes IQ demodulators, phase-controlling devices, a reference signal, a phase detector, and a control device. The phase-controlling devices are each associated with one of the IQ demodulators for outputting an output signal to its associated IQ demodulator having a phase controlled by the associated...

11/28/13 - 20130315290 - Methods and circuits for adaptive equalization
An integrated circuit equalizes a data signal expressed as a series of symbols. The symbols form data patterns with different frequency components. By considering these patterns, the integrated circuit can experiment with equalization settings specific to a subset of the frequency components, thereby finding an equalization control setting that optimizes...

11/28/13 - 20130315291 - Method and system for baseband predistortion linearization in multi-channel wideband communication systems
An efficient baseband predistortion linearization method for reducing the spectral regrowth and compensating memory effects in wideband communication systems using effective multiplexing modulation technique such as wideband code division multiple access and orthogonal frequency division multiplexing is disclosed. The present invention is based on the method of piecewise pre-equalized lookup...

11/28/13 - 20130315292 - Ofdm pre-equalizing
For example in case of an OFDM multicarrier transmission system the transmission characteristics of subcarriers of a multicarrier transmission system using a plurality of antenna elements (3, 3′) can be adjusted. Particularly the power and the phase of the subcarriers can be adapted. To this object the subcarrier frequency channel...

11/28/13 - 20130315293 - Methood and apparatus for correcting frequency offset
Embodiments of the present disclosure provide a method and an apparatus for correcting a frequency offset. The method includes: receiving n channels of first signals; performing frequency offset correction processing on the n channels of first signals to obtain n channels of first corrected signals; acquiring n center tap coefficients...

11/28/13 - 20130315294 - Serial communication apparatus
A serial communication apparatus includes a slew rate control circuit, an output circuit, a detection circuit, and a switching circuit. The slew rate control circuit has a predetermined impedance, and supplies a constant current from an output according to an input signal. In the output circuit, first capacitance is charged...