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Equalizers

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

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Pulse Or Digital Communications


Equalizers



Base station assisted frequency domain equalization
12/11/14 - 20140362898 - A method for wireless communication is described. The method includes receiving a burst that includes controlled sequence symbols transmitted in a guard period. The controlled sequence symbols include the last predetermined number symbols of a training sequence. The burst is demodulated based on the controlled sequence symbols. Other aspects, embodiments,...

Mixer with channel impedance equalization
11/27/14 - 20140348218 - A passive mixer with channel impedance equalization is disclosed. In an exemplary embodiment, an apparatus includes replica devices configured to generate replica output signals and an error amplifier configured to generate bias signals based on the replica output signals. The bias signals are configured to equalize on-state channel impedances associated...

Reducing out-of-band emission
10/30/14 - 20140321523 - Disclosed is a transmitter for a communication system. The transmitter comprises a sidelobe suppression module configured to apply a suppression matrix to an input vector comprising symbols to be transmitted by the transmitter; a modulation module configured to modulate the precoded vector to a time-domain symbol using a plurality of...

Fractional symbol based phase noise mitigation
09/04/14 - 20140247861 - Fractional symbol based phase noise mitigation, including methods and systems to determine phase noise trajectory, or indication of phase noise, for each of multiple fractional portions of a frequency domain symbol, and modify the symbol based on the phase noise trajectories of the subsets. Multiple correction hypotheses may be generated...

Maximal ratio combining of equalized symbols for mimo systems with harq and/or repetition coding
08/21/14 - 20140233625 - Systems and methods are provided for decoding signal vectors in multiple-input multiple-output (MIMO) systems, where the receiver has received one or more signal vectors based on the same transmitted vector. The receiver linearizes each received signal vector using one or more zero-forcing, MMSE, or other suitable linear equalizers. The components...

Apparatus and system for switching equalization
07/24/14 - 20140204990 - Described herein is apparatus and system for switching equalization. The apparatus comprises a sampler to sample an input signal; and an attenuator, coupled to the sampler, with a hysteresis associated with the input signal, the hysteresis of the attenuator is configurable to cancel hysteresis of a communication channel coupled to...

Modulation and equalization in an orthonormal time-frequency shifting communications system
06/19/14 - 20140169433 - A method which includes receiving a first modulated signal from a first user device, the first modulated signal being generated based upon a time-frequency transformation of first user data. The method further includes receiving a second modulated signal from a second user device, the second modulated signal being generated based...

Joint papr reduction and rate adaptive ultrasonic ofdm physical layer for high data rate through-metal communications
06/12/14 - 20140161169 - A link adaptive orthogonal frequency-division multiplexed (OFDM) ultrasonic physical layer is provided that is capable of high data rate communication through metallic structures. The use of an adaptive OFDM subcarrier-based modulation technique mitigates the effects of severe frequency selective fading of the through-metal communication link and improves spectral efficiency by...

Rate-adaptive dynamic spectrum management
06/05/14 - 20140153630 - The system may include a plurality of communication connections. A number of transmitters may transmit a signal to a number of receivers, the respective transmitter is adapted to convey transmit signal power to more than one receiver in the number of receivers. A process may adapt the allocation of power...

Matching signal dynamic range for turbo equalization system
05/22/14 - 20140140384 - A method for reducing a number of bits for representing a value is disclosed. A first value represented with a first number of bits is transformed to a second value represented with a second number of bits, wherein the first number of bits is greater than the second number of...

Low-complexity, highly-spectrally-efficient communications
05/15/14 - 20140133540 - A system may comprise circuitry that includes a sequence estimation circuit and a non-linearity modeling circuit. The circuitry may be operable to receive a single-carrier signal that was generated by passage of symbols through a partial response filter and through a non-linear circuit. The circuitry may be operable to generate...

Communications receiver with channel identification using a-priori generated gain vectors and associated methods
05/08/14 - 20140126621 - A communications receiver includes an antenna, and a burst signal acquisition circuit coupled to the antenna to detect a burst signal received over a wireless communications channel. The burst signal has a burst structure that includes channel-corrupted known preamble bits, channel-corrupted known probe bits and channel-corrupted unknown data bits. A...

Transimpedance amplifier with equalization
05/08/14 - 20140126622 - In one embodiment, a method includes applying, by a transimpedance amplifier at a receiving end of a communication link, equalization to a signal carried by the communication link at the receiving end of the communication link....

Multi-stage equalizer
05/01/14 - 20140119422 - An equalizer includes a multi-layer printed circuit board, an equalizing module, a first ground via, and a second ground via. The equalizing module includes two inputs, first and second signal vias, first and second resistors, two outputs, first and second microstrip lines. The first microstrip line extends from a side...

Jitter tolerant receiver
04/03/14 - 20140092951 - An embodiment of the invention includes a receiver with reduced error terms and incoming jitter tracking that improves jitter tolerance. An embodiment provides these benefits based on a voltage integrator that recovers data and clock information from incoming signals without use of a PLL, PI, CDR, and the like. An...

Receiver with multi layer interference cancellation
03/27/14 - 20140086296 - A multi user receiver configured to receive a signal including multiple symbol streams assigned to various users is described. The multiple symbol streams include at least one first symbol stream assigned to a user of the multi user receiver and at least one second symbol stream assigned to another user,...

Transmission circuit for i/o interface and signal transmission method thereof
03/27/14 - 20140086297 - A transmission circuit including an equalizer circuit, a slicer circuit, a signal detection circuit, and a control circuit is provided. The equalizer circuit performs an equalizing operation on an input signal according to preset states to output an equalizing signal corresponding to each preset state. The slicer circuit performs a...

Ground referenced single-ended signaling
02/13/14 - 20140044159 - One embodiment of the present invention sets forth a mechanism for transmitting and receiving ground-referenced single-ended signals. A transmitter combines a direct current (DC) to DC converter including a flying capacitor with a 2:1 clocked multiplexer to drive a single-ended signaling line. The transmitter drives a pair of voltages that...

High bandwidth equalizer and limiting amplifier
02/06/14 - 20140036982 - Embodiments of the present disclosure enable bandwidth extension of receiver front-end circuits without the use of inductors. As a result, significantly smaller and cheaper receiver implementations are made possible. In an embodiment, bandwidth extension is achieved by virtue of very small floating capacitors that are coupled around amplifier stages of...

Analog/digital co-design methodology to achieve high linearity and low power dissipation in a radio frequency (rf) receiver
01/30/14 - 20140029658 - Receiver design techniques are provided that are capable of producing relatively efficient, linear radio frequency (RF) receivers. During a design process, components of an analog receiver chain and digital nonlinearity compensation techniques are considered together to achieve reduced power consumption in the receiver....

Processing data in a receiver circuit and receiver circuit
01/30/14 - 20140029659 - A method includes receiving a signal including first data precoded on the basis of a first codebook entry of a codebook, wherein the codebook includes at least one further codebook entry, averaging a set of matrices to obtain a mean matrix wherein each matrix of the set of matrices is...

Apparatus and method for selective single-carrier equalization
01/23/14 - 20140023130 - Embodiments of an apparatus and method for selective single-carrier (SC) equalization are provided. Multipath propagation in a communication channel often changes, and the severity of multipath propagation is often below worst case conditions supported by a SC communication device. When multipath propagation is less severe and below worst conditions, the...

Method for processing a data signal and receiver circuit
01/09/14 - 20140010275 - A method includes receiving a signal including a co-channel interference, channel equalizing the received signal and processing the channel equalized signal based on a first precoding vector such that the co-channel interference is mitigated....

Receiver circuit
01/02/14 - 20140003482 - A receiver circuit includes a first amplification unit, a second amplification unit, a first equalizing unit, and a second equalizing unit. The first amplification unit is configured to differentially amplify an input signal and a reference signal and generate a first intermediate output signal and a second intermediate output signal....

Receiving device, receiving method, and program
12/12/13 - 20130329775 - The present technique relates to a receiving device, a receiving method, and a program for realizing a prompt start of data demodulation. A receiving device of one aspect of the present technique includes: a detecting unit that detects a first preamble signal from a frame signal having a frame structure...

Signal line routing to reduce crosstalk effects
12/05/13 - 20130322510 - A signaling system is disclosed. The system includes a transmitter comprising an encoder to encode a data signal such that the encoded data signal has a balanced number of logical 1s and 0s. The system also includes a receiver having a decoder to decode the encoded data signal, and a...

Equalization of transmissions
11/14/13 - 20130301696 - Transmissions from mid-bus test equipment to a first device and from a second device to the mid-bus test equipment are equalized. Equalization instructions are passed from the first device through the mid-bus test equipment to the second device. The mid-bus test equipment changes the quality of transmissions sent to the...

Wide common-mode range receiver
10/31/13 - 20130287084 - A wide common-mode range receiver includes an input module, voltage level shift module, voltage level shift control module, and output module. The receiver can also include an equalizer. The receiver translates data originating from a circuit powered from an external voltage supply to a circuit powered by an internal voltage...

Push-pull source-series terminated transmitter apparatus and method
10/31/13 - 20130287085 - A transmitter, such as a voltage mode driver (VMD)-based push-pull source-series terminated (SST) transmitter, is provided that can consume less current as the amplitude of a voltage output is decreased. The transmitter includes a transmitter circuit having a first branch and a second branch. While the first branch is activated...

Equalizer for loss-compensation of high-frequency signals generated in transmission channels
10/17/13 - 20130272363 - An equalizer for compensating transmission losses of electronic communication signals includes a circuit board and a compensation module. The compensation module includes a pair of input pins, a pair of output pins, and at least two resistors. When a signal transmitted by the circuit board is received by the input...

Digital transmission and reception devices for transmitting and receiving streams, and processing methods thereof
09/19/13 - 20130243065 - A transmission system to transmit a transport stream (TS) having normal data and additional data, the transmission system including: a stream constructor to generate a TS, and a multiplexer (MUX) to insert information representing the characteristics of additional data in the TS. Therefore, it is possible for a reception system...

Systems and methods for data processing including pre-equalizer noise suppression
09/12/13 - 20130235920 - The present inventions are related to systems and methods for pre-equalizer noise suppression in a data processing system. As an example, a data processing system is discussed that includes: a sample averaging circuit, a selector circuit, an equalizer circuit, and a mark detector circuit. The sample averaging circuit is operable...

Transmission stream generating device for generating transmission stream which additional data is stuffed in a payload area of a packet, digital broadcast transmitting/receiving device for transmitting/receiving the transmission stream, and methods thereof
08/15/13 - 20130208777 - A transmission stream (TS) generating apparatus includes an adaptor which receives general data and generates a stream having a plurality of packets, and which provides adaptive field in some of the plurality of packets, and an inserter which inserts additional data into all the payload areas of some of the...

Ground referenced single-ended signaling
08/01/13 - 20130195165 - One embodiment of the present invention sets forth a mechanism for transmitting and receiving ground-referenced single-ended signals. A transmitter combines a direct current (DC) to DC converter including a flying capacitor with a 2:1 clocked multiplexer to drive a single-ended signaling line. The transmitter drives a pair of voltages that...

Communication system having data-dependent superimposed training mechanisim and communication method thereof
07/25/13 - 20130188679 - The present invention discloses a communication system with a data-dependent superimposed training mechanism and a communication method thereof. The system uses a precoding module installed in front of the data-dependent superimposed training mechanism to precode data by a precoding matrix. The precoding matrix is a N×N unitary matrix, which is...

Digital phase equalizer for serial link receiver and method thereof
07/11/13 - 20130177063 - An apparatus of automatic power control for burst mode laser transmitter and method are provided. In one implementation a method includes: pushing a first multi-bit data into a data memory; modifying the data memory to remove a condition of frequent transition in the data memory, if the condition of frequent...

Successive interference cancellation system and method for mimo horizontal encoding and decoding
07/04/13 - 20130170534 - A method and system for receiving and decoding horizontally encoded MIMO-OFDM transmissions with improved efficiency. In one embodiment, MIMO decoding is performed on each of the extracted separate tones of a MIMO-OFDM signal to extract and demodulate frequency domain symbols of the first layer corresponding to one or more code...

Receiver and receiving method for hierarchical modulation in single frequency networks
07/04/13 - 20130170535 - A receiver recovers local service data symbols from first Orthogonal Frequency Division Multiplexed (OFDM) symbols in the presence of second OFDM symbols. The second OFDM symbols carry national broadcast data symbols and modulated on to the sub-carriers of the second OFDM symbols using a first modulation scheme. The first OFDM...

Phased array device and calibration method therefor
06/20/13 - 20130156085 - The calibration method, performed on a phased array device including channel elements coupled in parallel by a transmission line, has the steps of: obtaining channel responses corresponding to the channel elements through the transmission line, and each of the channel responses is obtained when one of the channel elements is...

Advanced interference cancellation for precoded gsm edge radio access network (geran)
05/23/13 - 20130128942 - An interference cancellation receiver for a pre-coded orthogonal frequency division multiplexed (OFDM) based system combines temporal interference cancellation within the OFDM framework. Multi-path equalization and inter-symbol interference (ISI) cancellation are performed on a time domain channel estimate of a received signal. An output from the multi-path equalization is transformed to...

Wireless communication receiver with phase noise estimation and phase noise compensation performed after channel estimation, and related wireless communication receiving method and phase noise compensation apparatus
05/09/13 - 20130114661 - A wireless communication receiver includes a first signal processing block, a phase noise compensation apparatus, and a second signal processing block. The first signal processing block is arranged for generating a first processed output by processing a reception signal, wherein the first signal processing block includes a channel estimation unit...

Receiver and method for detecting a pre-coded signal
05/02/13 - 20130107932 - A multi-user MIMO receiver of a UE in question for detecting a pre-coded signal includes a unit configured to blindly estimate information concerning a pre-coding vector for a paired UE, which is operated on the same resource as the multi-user MIMO receiver, based on received data. Further, the multi-user MIMO...

Wireless transport framework with variable equalizer training
04/11/13 - 20130089131 - A system and method for wirelessly transmitting audiovisual information. Training information may be stored in a memory. A plurality of packets may be generated, including the training information. The plurality of packets may also include audiovisual information. The plurality of packets may include first information identifying a first training pattern...

Concatentation-assisted symbol-level combining for mimo systems with harq and/or repetition coding
04/04/13 - 20130083836 - Systems and methods are provided for decoding signal vectors in multiple-input multiple-output (MIMO) systems, where the receiver has received one or more signal vectors from the same transmitted vector. The receiver combines the received vectors by vector concatenation The concatenated vector may then be decoded using, for example, maximum-likelihood decoding....

Digital frequency divider
03/21/13 - 20130070832 - Various embodiments of the present invention relate to systems, devices and method of frequency synthesis that generate in-phase and quadrature-phase clock signals at a programmable frequency. The generated frequency, which can range from a fraction to multiples of the input reference frequency, is generated by dividers following a phase-locked loop,...

Wireless transmission system and method of wirelessly transmitting digital information
02/28/13 - 20130051449 - A wireless communication system is provided having a transmitter, having a modulation unit for performing a frequency shift keying modulation wherein an output of the modulation unit is bundled into data blocks. The communication system furthermore comprises a cyclic prefix adding unit for adding a cyclic prefix (CP) into each...

Communication system, transmission device, reception device, program, and processor
02/14/13 - 20130039405 - A coding scheme selection unit outputs bits of a signal in a past reception to a second coding unit and outputs bits of a retransmission signal to a third coding unit. The second coding unit decodes bits. The third coding unit codes bits with a different constraint length from a...

Symbol timing recovery circuit
02/07/13 - 20130034142 - Disclosed is a symbol timing recovery circuit which includes an interpolator to generate, using a first filter, interpolation data of an input signal; a forward equalizer to eliminate, using a second filter, a forward interference wave from the input signal based on the interpolation data, and to output the resultant...

Method and system for selective equalization enablement based on modulation type
01/10/13 - 20130010853 - Aspects of a method and system for selective equalization enablement based on modulation type are disclosed. One such method includes receiving a signal via an RF channel, detecting a modulation type of the signal, and selecting an equalization circuit for processing the signal based on the modulation type....

Apparatus and method for selective single-carrier equalization
12/13/12 - 20120314750 - Embodiments of an apparatus and method for selective SC equalization are provided. Multipath propagation in a communication channel often changes, and the severity of multipath propagation is often below worst case conditions supported by a SC communication device. When multipath propagation is less severe and below worst conditions, the use...

Channel estimation in a multi-user mimo-ofdm system in the presence of user terminal symbol-specific phase offsets
12/13/12 - 20120314751 - Disclosed is an OFDM wireless communication system comprising an access point, and a plurality of remote user terminals. The access point receives one or more training symbols transmitted by the user terminals, each training symbol comprising pilot symbols associated with phase offset estimation OFDM sub-carriers of said training symbol, the...

Multi-user detection using equalization and successive interference cancellation
12/13/12 - 20120314752 - A method and apparatus for multi-user detection is disclosed. A signal is received in a shared spectrum, and samples of the received signals are produced as a received vector. The received vector is segmented into vector segments. Each segment has a portion that overlaps with another segment and the overlapping...

Equalizer with controllably weighted parallel high pass and low pass filters and receiver including such an equalizer
12/13/12 - 20120314753 - An adjustable equalizer that includes a first branch including a low pass filter (LPF) typically having a variable gain (β), and a second branch including a high pass filter (HPF) typically having another variable gain (α). Outputs of the branches in response to an input signal are summed to produce...

Signal processing in wireless communication receivers
11/22/12 - 20120294350 - A method, receiver and program for equalising digital samples of a radio signal received over a wireless communications channel. The method comprises: receiving digital samples of the radio signal; calculating equaliser coefficients in the frequency domain; transforming the equaliser coefficients from the frequency domain to the time domain; and equalising...

Device and method for identification and cancellation of crosstalk
11/08/12 - 20120281746 - In order to allow cancellation of FEXT, where wire pairs of a bundle of transmission lines are non-reciprocally coupled, the device according to the present invention for cancellation for and identification of interfering signals in a communication system possess at least a cancellation circuit, which is connected downstream to dead...

Receiver and method
09/27/12 - 20120243596 - A receiver receives data from a sequence of OFDM symbols transmitted via a channel, each OFDM symbol comprising a plurality of data bearing sub-carriers and a plurality of pilot bearing sub-carriers. The receiver includes a channel estimator for estimating the channel and an equaliser for reducing the effects of the...

Upstream frequency response measurement and characterization
09/27/12 - 20120243597 - Upstream frequency response measurement and characterization. Signaling is provided between respective communication devices within a communication system. Based upon at least one of these signals, one of the communication devices captures a number of sample sets corresponding thereto at different respective frequencies (e.g., a different respective center frequencies, frequency bands,...

Transceiver system and associated methods and systems
09/13/12 - 20120230381 - In the example embodiments, test signals sent from a transmitting system are received at a receiving system. The receiving system generates a determination signal indicating, in one embodiment, whether received signals have a desired relationship with respect to a clock signal at the receiving system. Timing of the clock signal...

Systems and methods for providing integrated financial calculations and action plans
09/13/12 - 20120230382 - A baseband-derived RF predistortion system using a lookup table having coefficients extracted at baseband and then applied at RF by means of a vector modulator. The architecture combines the narrowband advantage of envelope predistortion with the accuracy of baseband predistortion, and including compensation for memory effects. A polynomial-based alternative is...

Apparatus and method for receiving data in a communication system
09/06/12 - 20120224620 - The present invention relates to an apparatus and a method for receiving data using a low-density parity check (LDPC) decoding scheme in a digital broadcasting system. The method comprises calculating a parity check matrix of a trellis coded modulation symbol from data that is received via an antenna; transforming the...

Method and device for inter-chip and inter-antenna interference cancellation
08/30/12 - 20120219051 - A wireless receiver is constructed to equalize a time-domain received signal, detect a plurality of symbols of the equalized time-domain received signal, and perform interference cancellation on the time-domain received signal. The interference cancellation can be performed using a partial result produced by an IDFT, and may use only neighboring...

Method and apparatus for reducing the processing rate of a chip-level equalization receiver
08/02/12 - 20120195358 - A method and apparatus for reducing the processing rate when performing chip-level equalization (CLE) in a code division multiple access (CDMA) receiver which includes an equalizer filter. Signals received by at least one antenna of the receiver are sampled at M times the chip rate. Each sample stream is split...

Signaling with superimposed clock and data signals
07/26/12 - 20120189045 - A data receiver circuit includes an interface to receive an input signal that includes a data signal and a clock signal superimposed on the data signal. The data signal has an associated symbol rate and an associated symbol period equal to the reciprocal of the associated symbol rate. The clock...

Method and receiver for estimating the channel impulse response using a constant modulus interference removal iteration
07/19/12 - 20120183036 - A receiver and associated method estimates a channel impulse response of the communications signal. A communications signal is received as a burst of transmitted symbols, including a known training sequence. The joint estimation of timing offset and initial channel impulse response is determined based on the cross-correlations of the known...

System and method for signaling and detecting in wireless communications systems
06/14/12 - 20120147942 - A system and method for signaling and detecting in wireless communications systems are provided. A method for processing information includes operating in a first phase, and operating in a second phase in response to determining that a first user is transmitting at a substantially higher power level than a second...

Reception circuit
06/07/12 - 20120140811 - A reception circuit includes: a sampling circuit to sample an input data signal based on a clock signal and output a sampled signal; a data interpolation circuit to interpolate the sampled signal based on phase information corresponding to the sampled signal and output an interpolated data signal; an interpolation error...

Methods and apparatus for wirelessly communicating signals that include embedded synchronization/pilot sequences
05/17/12 - 20120121003 - An embodiment for wirelessly communicating a signal includes a transmitter combining a plurality of phase shifted input data signals with a plurality of synchronization/pilot sequences to produce a plurality of combined signals, performing frequency domain-to-time domain transformations of the combined signals to produce a plurality of candidate signals, determining peak-to-average...

Ofdm signal demodulation method and device thereof
05/10/12 - 20120114031 - The present invention discloses an OFDM signal demodulation method and device thereof. The method comprises: adding a pre-obtained timing offset estimation value of an OFDM signal demodulation device to the initial position of an OFDM symbol of a received signal to obtain a window deviation value of the OFDM symbol;...

Equalization in proximity communication
05/10/12 - 20120114032 - A device includes a semiconductor die having a surface, a plurality of proximity connectors proximate to the surface, and a circuit coupled to at least one of the plurality of proximity connectors. The semiconductor die is configured to communicate voltage-mode signals through capacitive coupling using one or more of the...

Reception apparatus, reception method, and program
04/26/12 - 20120099635 - Disclosed herein is a reception apparatus including a calculation section and a storage section. The calculation section calculates correlation values between a data sequence included in a known signal and a received signal at a given point in time. The storage section has at least an area sufficient for storing...

Apparatus and method for interference cancellation in mimo wireless communication system
04/26/12 - 20120099636 - An apparatus and a method for interference cancellation in a Multiple Input Multiple Output (MIMO) wireless communication system. The method for interference cancellation includes equalizing first reception signals received through two or more reception antennas to estimate transmission signals transmitted through two or more transmission antennas, generating two or more...