Patents by Inventor Amir Eliaz

Amir Eliaz has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10498486
    Abstract: An apparatus includes a demapper to compute a reliability metric associated with a number of bit streams received by multiple radio-frequency (RF) antennas. The apparatus further includes a channel decoder in a feedback loop with the demapper to process the reliability metric and to provide a feedback signal to the demapper. The demapper is an iterative demapper and can use a symbol subset of at least a first stream of the plurality of bit streams and the feedback signal to compute the reliability metric for a second stream of the plurality of bit streams.
    Type: Grant
    Filed: August 23, 2018
    Date of Patent: December 3, 2019
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventors: Daniel Stopler, Rethnakaran Pulikkoonattu, Roy Oren, Ilan Reuven, Amir Eliaz
  • Patent number: 10367671
    Abstract: High peak-to-average ratio of OFDM signals requires large back-off from an RF power amplifier's saturation power. A spectral shaper device therefore increases the output power and efficiency of the power amplifier. The shaper device performs linearization through digital predistortion, based on an out-of-band regrowth limit, as well as the EVM requirement for a particular data rate. The shaper can distribute the error energy, precisely, over frequencies such that each of the inband and out-of-band requirements is independently and individually met. The shaper distributes error energy to frequency regions in the spectrum to the maximally allowed by the standards and regulations, while not increasing the total error. The error energy is kept to the minimum where it is crucial in meeting EVM requirements. In this way, the shaper maximizes the allowable output power of the nonlinear power amplifier.
    Type: Grant
    Filed: November 28, 2017
    Date of Patent: July 30, 2019
    Assignee: AVAGO TECHNOLOGIES INTERNATIONAL
    Inventors: Dengwei Fu, Colin Fraser, Amir Eliaz, Daniel Stopler, Sandeep Shenoy
  • Patent number: 10361808
    Abstract: A device includes circuitry configured to determine one or more signal processing capabilities of another device in communication with the device. The device configures a signal compression mode of the device to correspond to a first signal compression mode of a plurality signal compression modes based on the one or more signal processing capabilities of the other device. The device s configured to modify, in response to detecting variations in one or more network configuration properties or the one or more signal processing capabilities of the other device, the signal compression mode of the device.
    Type: Grant
    Filed: November 1, 2016
    Date of Patent: July 23, 2019
    Assignee: AVAGO TECHNOLOGIES INTERNATIONAL SALES PTE. LIMITED
    Inventors: Amir Eliaz, Ilan Reuven, Daniel Stopler, Roy Oren, Shimon Benjo
  • Publication number: 20190165981
    Abstract: High peak-to-average ratio of OFDM signals requires large back-off from an RF power amplifier's saturation power. A spectral shaper device therefore increases the output power and efficiency of the power amplifier. The shaper device performs linearization through digital predistortion, based on an out-of-band regrowth limit, as well as the EVM requirement for a particular data rate. The shaper can distribute the error energy, precisely, over frequencies such that each of the inband and out-of-band requirements is independently and individually met. The shaper distributes error energy to frequency regions in the spectrum to the maximally allowed by the standards and regulations, while not increasing the total error. The error energy is kept to the minimum where it is crucial in meeting EVM requirements. In this way, the shaper maximizes the allowable output power of the nonlinear power amplifier.
    Type: Application
    Filed: November 28, 2017
    Publication date: May 30, 2019
    Applicant: AVAGO TECHNOLOGIES INTERNATIONAL SALES PTE. LIMITED
    Inventors: Dengwei FU, Colin Fraser, Amir Eliaz, Daniel Stopler, Sandeep Shenoy
  • Patent number: 9893747
    Abstract: A modulator and demodulator pair may switch configurations without introducing errors as a result of the switch. Different configurations may, for example, correspond to different symbol rates and/or different amounts of controlled inter-symbol interference (ISI) introduced to the transmitted signal. For example, a first configuration may use be a near-zero ISI configuration (e.g., using Nyquist signaling) and a second configuration may introduce a significant (e.g., amount that would result in errors above a desired threshold if demodulation relied on symbol-by-symbol slicing) but controlled amount of ISI (e.g., using partial response or faster-than-Nyquist-rate signaling). Switching between modulator/demodulator configurations may be needed to maintain a stable link in the case of dynamic channels. At any given time, a modulator and demodulator pair may, for example, switch to a configuration that provides maximal throughput for the current channel conditions.
    Type: Grant
    Filed: March 1, 2016
    Date of Patent: February 13, 2018
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventors: Amos Intrater, Amir Eliaz, Shlomy Chaikin, Gal Pitarasho
  • Patent number: 9800447
    Abstract: A transmitter may comprise a symbol mapper circuit and operate in at least two modes. In a first mode, the number of symbols output by the mapper circuit per orthogonal frequency division multiplexing (OFDM) symbol transmitted by said transmitter may be greater than the number of data-carrying subcarriers used to transmit the OFDM symbol. In a second mode, the number of symbols output by said mapper circuit per orthogonal frequency division multiplexing (OFDM) symbol transmitted by said transmitter is less than or equal to the number of data-carrying subcarriers used to transmit said OFDM symbol. The symbols output by the symbol mapper circuit may be N-QAM symbols. While the circuitry operates in the first mode, the symbols output by the mapper may be converted to physical subcarrier values via filtering and decimation prior to being input to an IFFT circuit.
    Type: Grant
    Filed: November 25, 2015
    Date of Patent: October 24, 2017
    Assignee: AVAGO TECHNOLOGIES GENERAL IP (SINGAPORE) PTE. LTD.
    Inventors: Amir Eliaz, Ilan Reuven
  • Patent number: 9762350
    Abstract: A system that includes combiner circuitry configured to combine a first signal and a second signal to generate a third signal, wherein said third signal is output for transmission onto a communication medium. The system also includes nonlinearity modeling circuitry configured to model a nonlinear response of a nonlinear circuit, and generate a fourth signal through nonlinear distortion of a fifth signal using said model. The system also includes bin modification circuitry configured to generate said second signal through application of one or more weighting factors to frequency bins of said fourth signal, or of a transformed version of said fourth signal, and determine said weighting factors based on a difference, or squared difference, error metric.
    Type: Grant
    Filed: January 26, 2016
    Date of Patent: September 12, 2017
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventors: Daniel Stopler, Amir Eliaz
  • Patent number: 9686104
    Abstract: A receiver comprises a sequence estimation circuit and a soft-input-soft-output (SISO) decoder. The sequence estimation circuit comprises circuitry operable to generate first soft bit decisions for symbols of a received inter-symbol-correlated signal. The SISO decoder comprises circuitry operable to decode the first soft bit decisions to generate corrected soft bit decisions. The circuitry of the sequence estimation circuit is operable to generate, based on the corrected soft bit decisions, second soft bit decisions for the symbols of the received inter-symbol-correlated signal, which are improved/refined relative to the first soft bit decisions.
    Type: Grant
    Filed: August 24, 2015
    Date of Patent: June 20, 2017
    Assignee: AVAGO TECHNOLOGIES GENERAL IP (SINGAPORE) PTE. LTD.
    Inventors: Amir Eliaz, Ilan Reuven
  • Publication number: 20170141875
    Abstract: A device includes circuitry configured to determine one or more signal processing capabilities of another device in communication with the device. The device configures a signal compression mode of the device to correspond to a first signal compression mode of a plurality signal compression modes based on the one or more signal processing capabilities of the other device. The device s configured to modify, in response to detecting variations in one or more network configuration properties or the one or more signal processing capabilities of the other device, the signal compression mode of the device.
    Type: Application
    Filed: November 1, 2016
    Publication date: May 18, 2017
    Applicant: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventors: Amir ELIAZ, Ilan Reuven, Daniel Stopler, Roy Oren, Shimon Benjo
  • Patent number: 9577786
    Abstract: A transmitter may be operable to generate a sequence of symbols which may comprise information symbols and one or more pilot symbols. The transmitter may transmit the information symbols at a first power and transmit the one or more pilot symbols at a second power. In instances when a particular performance indicator is below a determined threshold, the first power may be set to a first value and the second power may be set to zero value. In instances when the particular performance indicator is above the determined threshold, the first power may be set to a second value and the second power may be set to a non-zero value. A value of the first power and a value of the second power may be based on an applicable average power limit determined by a communications standard with which the transmitter is to comply.
    Type: Grant
    Filed: February 24, 2014
    Date of Patent: February 21, 2017
    Assignee: MAGNACOM LTD.
    Inventor: Amir Eliaz
  • Patent number: 9496900
    Abstract: A transmitter comprises a symbol mapper operable to map a frame of bits to a frame of symbols, where the symbols correspond to a determined modulation scheme, and circuitry operable to convert the frame of symbols to a physical layer signal and transmit the physical layer signal onto a communication medium. The circuitry is operable to process the physical layer signal such that a first portion of the physical layer signal is a first type of signal (e.g., a linear signal and/or non-ISC signal) and a second portion of the physical layer signal is a second type of signal (e.g., nonlinear signal and/or ISC signal). The first portion of the physical layer signal may comprise a header, a preamble, and/or a payload of the frame. The second portion of the physical layer signal may comprise a header, a preamble, and/or a payload of the frame.
    Type: Grant
    Filed: May 5, 2015
    Date of Patent: November 15, 2016
    Assignee: MagnaCom Ltd.
    Inventors: Ilan Reuven, Amir Eliaz
  • Patent number: 9467251
    Abstract: A receiver receives an inter-symbol correlated (ISC) signal with information symbols and a corresponding parity symbol. Values of information symbols are estimated utilizing parity samples that are generated from the parity symbols. One or more maximum likelihood (ML) decoding metrics are generated for the information symbols. One or more estimations are generated for the information symbols based on the one or more ML decoding metrics. A parity metric is generated for each of the one or more generated estimations of the information symbols. The parity metric is generated by summing a plurality of values of one of the generated estimations to generate a sum, and wrapping the sum to obtain a parity check value that is within the boundaries of a symbol constellation utilized in generating the information symbols.
    Type: Grant
    Filed: March 2, 2015
    Date of Patent: October 11, 2016
    Assignee: MagnaCom Ltd.
    Inventor: Amir Eliaz
  • Publication number: 20160254933
    Abstract: A method and system for configuring one or both of a transmitter pulse-shaping filter and a receiver pulse-shaping filter to generate a total partial response that incorporates a predetermined amount of inter-symbol interference (ISI), based on one or more defined performance-related variables and one or more set constraints that are applicable to one or both of the transmitter pulse-shaping filter and the receiver pulse-shaping filters. The predetermined amount of ISI is determined based on an estimation process during extraction of data from an output of the receiver pulse-shaping filter, such that performance of total partial response based communication matches or surpasses performance of communication incorporating filtering based on no or near-zero ISI. The configuring may comprise determining optimized filtering configuration, by applying an optimization process which is based on, at least in part, the one or more constraints and the one or more performance-related variables.
    Type: Application
    Filed: March 11, 2016
    Publication date: September 1, 2016
    Applicant: MagnaCom Ltd.
    Inventor: Amir Eliaz
  • Publication number: 20160248531
    Abstract: An electronic receiver may comprise nonlinear distortion modeling circuitry, interference estimation circuitry, and sequence estimation circuitry. The receiver may receive an orthogonal frequency division multiplexing (OFDM) symbol in the form of an electromagnetic signal. The nonlinear distortion modeling circuitry may generate a nonlinear distortion model that models nonlinear distortion introduced to the received electromagnetic signal en route to the sequence estimation circuitry. The interference estimation circuitry may estimate inter-subcarrier interference present in the received OFDM symbol based on the generated nonlinear distortion model. The estimating of the inter-subcarrier interference may comprise applying the nonlinear distortion model to one or more candidate vectors generated by the sequence estimation circuitry. The sequence estimation circuitry may sequentially process a plurality of received virtual subcarrier values of the OFDM symbol using the estimated inter-subcarrier interference.
    Type: Application
    Filed: February 23, 2016
    Publication date: August 25, 2016
    Applicant: MagnaCom Ltd.
    Inventors: Amir Eliaz, Ilan Reuven
  • Publication number: 20160248457
    Abstract: A modulator and demodulator pair may switch configurations without introducing errors as a result of the switch. Different configurations may, for example, correspond to different symbol rates and/or different amounts of controlled inter-symbol interference (ISI) introduced to the transmitted signal. For example, a first configuration may use be a near-zero ISI configuration (e.g., using Nyquist signaling) and a second configuration may introduce a significant (e.g., amount that would result in errors above a desired threshold if demodulation relied on symbol-by-symbol slicing) but controlled amount of ISI (e.g., using partial response or faster-than-Nyquist-rate signaling). Switching between modulator/demodulator configurations may be needed to maintain a stable link in the case of dynamic channels. At any given time, a modulator and demodulator pair may, for example, switch to a configuration that provides maximal throughput for the current channel conditions.
    Type: Application
    Filed: March 1, 2016
    Publication date: August 25, 2016
    Applicant: MagnaCom Ltd.
    Inventors: Amos Intrater, Amir Eliaz, Shlomy Chaikin, Gal Pitarasho
  • Publication number: 20160241359
    Abstract: A transmitter comprises at least one nonlinear circuit, and a power spectral density (PSD) shaping circuit. The PSD shaping circuit is operable to receive a symbol of a modulated signal, wherein the symbol corresponds to a first one or more frequency bins. The PSD shaping circuit is operable to perform iterative processing of the symbol, wherein each iteration of the processing comprises: generation of a pre-distortion signal based on a model of the at least one nonlinear circuit, wherein the nonlinearly distorted signal corresponds to a second one or more frequency bins; and combination of the symbol, or a pre-distorted version of the symbol, with the nonlinearly-distorted signal. The generation of the pre-distorted signal may comprise generation of a nonlinearly-distorted signal, and adjustment of one or more components of the nonlinearly-distorted signal.
    Type: Application
    Filed: January 26, 2016
    Publication date: August 18, 2016
    Applicant: MagnaCom Ltd.
    Inventors: Daniel Stopler, Amir Eliaz
  • Publication number: 20160191091
    Abstract: An electronic receiver comprises a nonlinear distortion modeling circuit and a nonlinear distortion compensation circuit. The nonlinear distortion modeling circuit is operable to determine a plurality of sets of nonlinear distortion model parameter values, where each of the sets of nonlinear distortion model parameter values representing nonlinear distortion experienced by signals received by the electronic receiver from a respective one a plurality of communication partners. The nonlinear distortion compensation circuit is operable to use the sets of nonlinear distortion model parameter values for processing of signals from the plurality of communication partners. Each of the sets of nonlinear distortion model parameter values may comprises a plurality of values corresponding to a plurality of signal powers. The sets of nonlinear distortion model parameters may be stored in a lookup table indexed by a signal strength parameter.
    Type: Application
    Filed: September 8, 2015
    Publication date: June 30, 2016
    Inventors: Amir Eliaz, Ilan Reuven
  • Publication number: 20160099818
    Abstract: A receiver is configured to receive a sample of an inter-symbol correlated (ISC) signal, the sample corresponding to a time instant when phase and/or amplitude of the ISC signal is a result of correlation among a plurality of symbols of a transmitted symbol sequence. The receiver may linearize the sample of the ISC signal. The receiver may calculate a residual signal value based on the linearized sample of the ISC signal. The receiver may generate an estimate of one or more of said plurality of symbols based on a slicing of the residual signal value. The linearization may comprise applying an estimate of an inverse of a non-linear model. The non-linear model may be a model of nonlinearity experienced by the ISC signal in a transmitter from which the ISC signal originated, in a channel through which the ISC signal passed en route to the receiver, and/or in a front-end of the receiver.
    Type: Application
    Filed: December 14, 2015
    Publication date: April 7, 2016
    Inventors: Amir Eliaz, Ilan Reuven, Gal Pitarasho
  • Publication number: 20160087830
    Abstract: A transmitter may comprise a symbol mapper circuit and operate in at least two modes. In a first mode, the number of symbols output by the mapper circuit per orthogonal frequency division multiplexing (OFDM) symbol transmitted by said transmitter may be greater than the number of data-carrying subcarriers used to transmit the OFDM symbol. In a second mode, the number of symbols output by said mapper circuit per orthogonal frequency division multiplexing (OFDM) symbol transmitted by said transmitter is less than or equal to the number of data-carrying subcarriers used to transmit said OFDM symbol. The symbols output by the symbol mapper circuit may be N-QAM symbols. While the circuitry operates in the first mode, the symbols output by the mapper may be converted to physical subcarrier values via filtering and decimation prior to being input to an IFFT circuit.
    Type: Application
    Filed: November 25, 2015
    Publication date: March 24, 2016
    Inventors: Amir Eliaz, Ilan Reuven
  • Patent number: 9294225
    Abstract: A receiver may be operable to receive an inter-symbol correlated (ISC) signal, and generate a plurality of soft decisions as to information carried in the ISC signal. The soft decisions may be generated using a reduced-state sequence estimation (RSSE) process. The RSSE process may be such that the number of symbol survivors retained after each iteration of the RSSE process is less than the maximum likelihood state space. The plurality of soft decisions may comprise a plurality of log likelihood ratios (LLRs). Each of the plurality of LLRs may correspond to a respective one of a plurality of subwords of a forward error correction (FEC) codeword.
    Type: Grant
    Filed: January 30, 2015
    Date of Patent: March 22, 2016
    Assignee: MagnaCom Ltd.
    Inventors: Amir Eliaz, Ilan Reuven