Adaptive Patents (Class 708/322)
  • Patent number: 11550545
    Abstract: Techniques related to a low-power, low-memory multiply and accumulate (MAC) unit are described. In an example, the MAC unit performs a MAC operation that represents a multiplication of numbers. At least the bit representation of one number is compressed based on a quantization and a clustering of quantization values, whereby index bits are used instead of the actual bit representation. The index bits are loaded in an index buffer and a bit representation of another number is loaded in an input buffer. The index bits are used in a lookup to determine whether the corresponding bit representation and shift operations are applied to the input buffer based on this bit representation, followed by accumulation operations.
    Type: Grant
    Filed: November 6, 2020
    Date of Patent: January 10, 2023
    Assignee: SK hynix Inc.
    Inventors: Fan Zhang, Aman Bhatia
  • Patent number: 11526965
    Abstract: A computer-implemented method includes applying a filter to input data based on an initial set of parameters to generate an initial feature map. The filter is configured to activate a filter function that involves a periodic function. The method includes performing a first linear transform on the initial feature map based on a subset of a first set of parameters to generate a first linear transform. The method includes applying the filter to the input data based on another subset of the first set of parameters to generate a first feature map. The method includes performing a multiplicative operation on the first linear transform and the first feature map to generate a first product. The method includes performing a second linear transform on the first product based on a subset of a second set of parameters to generate a second linear transform. The method includes generating output data that takes into account at least the second linear transform.
    Type: Grant
    Filed: September 28, 2020
    Date of Patent: December 13, 2022
    Assignee: Robert Bosch GmbH
    Inventors: Devin Willmott, Anit Kumar Sahu, Rizal Fathony, Filipe Cabrita Condessa, Jeremy Zieg Kolter
  • Patent number: 11373656
    Abstract: Disclosed are a speech processing method and a speech processing apparatus in a 5G communication environment through speech processing by executing embedded artificial intelligence (AI) algorithms and/or machine learning algorithms. The speech processing method includes determining a temporary pause of reception of a first spoken utterance, outputting a first spoken response utterance as a result of speech recognition processing of a second spoken utterance received after the temporary pause, determining, as an extension of the first spoken utterance, a third spoken utterance that is received after outputting the first spoken response utterance, deleting, using a deep neural network model, a duplicate utterance part from a fourth spoken utterance that is obtained by combining the first and the third spoken utterance, and outputting a second spoken response utterance as a result of speech recognition processing of the fourth spoken utterance from which the duplicate utterance part has been deleted.
    Type: Grant
    Filed: December 5, 2019
    Date of Patent: June 28, 2022
    Assignee: LG ELECTRONICS INC.
    Inventors: Ye Jin Kim, Hyun Yu, Byeong Ha Kim
  • Patent number: 11328703
    Abstract: A loudspeaker device includes at least one loudspeaker, a loudspeaker holder holding the at least one loudspeaker in a reference range away from the ear of a user by a reference distance, a first microphone collecting an environmental sound and outputting an electrical signal, a second microphone attached to a position where a sound output from the at least one loudspeaker is collected, the second microphone collecting a synthetic sound synthesized from the sound output from the at least one loudspeaker and the environmental sound and outputting an electrical signal, and a processor controlling the at least one loudspeaker so as to output a sound for reducing the environmental sound based on the electrical signals representing the sounds collected by the first microphone and the second microphone.
    Type: Grant
    Filed: September 23, 2020
    Date of Patent: May 10, 2022
    Assignee: CASIO COMPUTER CO., LTD.
    Inventor: Takahiro Mizushina
  • Patent number: 11293812
    Abstract: Embodiments of the disclosure implement an application of an adaptive filter bank that is used to characterize the heat transfer of a volume in a thermal system, to estimate temperature and power consumption, and to improve performance characteristics in applications including optimal temperature control and diagnostics. In some embodiments, the adaptive filter bank is an iterative solution, comprised of a collection of adaptive filters defined to consume incident signals, produce an aggregate reference signal, estimate an error relative to an observed primary signal, and modify thermal coefficients to converge on a solution. For example, the incident signals are comprised of properties related to active, passive, solar irradiance, and unobserved heat transfer. A reference signal is an estimate of a primary signal, related to the rate of heat transfer or temperature change. Thereupon, the thermal coefficients are modified in an adaptive process to include gradient descent, which minimizes estimation error.
    Type: Grant
    Filed: July 23, 2019
    Date of Patent: April 5, 2022
    Assignee: Schneider Electric USA, Inc.
    Inventor: Larry A. Turner
  • Patent number: 11094310
    Abstract: According to the present disclosure, an additional sound generating unit detects, as a noise frequency, a frequency of a noise at a control point and generates an additional sound signal including signal components with additional frequencies different from the noise frequency. A canceling signal generating unit generates a canceling signal that cancels the noise at the control point. An emission unit outputs a control sound signal, generated by adding the additional sound signal to the canceling signal, to a loudspeaker and makes the loudspeaker emit the control sound.
    Type: Grant
    Filed: August 20, 2018
    Date of Patent: August 17, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Daichi Toh, Wakio Yamada
  • Patent number: 11025228
    Abstract: Various embodiments provide methods, apparatuses, systems, or computer program products for providing a signal with dynamically shaped noise. In an example embodiment, the system comprises a dynamic filter, wherein a dynamic filter is a filter that is capable of switching between at least two responses; a signal generator configured to generate a signal; and a controller configured to control operation of the signal generator and selection of an operating response from the at least two responses of the dynamic filter. The controller causes the signal generator to generate a signal, the signal is provided to the dynamic filter, and the controller causes the dynamic filter to filter the signal in accordance with the operating response. The filtered signal is then provided to an electrical component of the system to cause at least a portion of the system to perform a function.
    Type: Grant
    Filed: May 12, 2020
    Date of Patent: June 1, 2021
    Assignee: Honeywell International Inc.
    Inventors: Leonardo Ascarrunz, Corey Barnes, Ryan Jacobs
  • Patent number: 10819857
    Abstract: An endpoint receives audio from a remote endpoint. A first signal corresponding to the audio is received at an adaptive filter, and a filtered signal is generated. First audio is emitted at a loudspeaker based on the first signal. A microphone collects second audio which is based on the first audio. The microphone signal emits a signal based on the second audio. The filtered signal is subtracted from microphone signal to generate an adapted signal, the adapted signal having an energy level. The adapted signal is then transmitted to a double-talk detector, the double-talk detector configured to allow transmission of the adapted signal to the remote endpoint when the energy level of the adapted signal exceeds an energy threshold. The degree of cross-correlation between the first signal and the adapted signal is determined (iteratively). If the cross-correlation exceeds a cross-correlation threshold, the energy threshold of the double-talk detector is raised.
    Type: Grant
    Filed: January 22, 2019
    Date of Patent: October 27, 2020
    Assignee: Polycom, Inc.
    Inventor: Peter L. Chu
  • Patent number: 10708690
    Abstract: A method is provided for a correction of an audio signal (AS) which is formed using an electroacoustic transducer. The method comprises producing a corrected audio signal (CAS) based on the audio signal (AS) according to the formal I: in which the coefficient B amounts from ?10 to 0 and the coefficient C amounts from 0 to 0.04.
    Type: Grant
    Filed: September 2, 2016
    Date of Patent: July 7, 2020
    Assignee: YAYUMA AUDIO SP. Z.O.O.
    Inventors: Jaroslaw Proksa, Jerzy Pona, Marcin Skrzypczak
  • Patent number: 10685264
    Abstract: The present disclosure relates to a method for processing input visual data using a generated algorithm based upon input visual data and the output of a calculated energy function. According to a first aspect of the disclosure, there is provided a method for enhancing input visual data using an algorithm, the method comprising evaluating gradients of the output of an energy function with respect to the input visual data; using the gradient output to enhance the input visual data; and outputting the enhanced visual data.
    Type: Grant
    Filed: December 27, 2017
    Date of Patent: June 16, 2020
    Assignee: Magic Pony Technology Limited
    Inventors: Ferenc Huszar, Robert David Bishop, Zehan Wang
  • Patent number: 10657958
    Abstract: Provided is a target speech signal extraction method for robust speech recognition including: (a) receiving information on a direction of arrival of the target speech source with respect to the microphones; (b) generating a nullformer by using the information on the direction of arrival of the target speech source to remove the target speech signal from the input signals and to estimate noise; (c) setting a real output of the target speech source using an adaptive vector w(k) as a first channel and setting a dummy output by the nullformer as a remaining channel; (d) setting a cost function for minimizing dependency between the real output of the target speech source and the dummy output using the nullformer by performing independent component analysis (ICA); and (e) estimating the target speech signal by using the cost function, thereby extracting the target speech signal from the input signals.
    Type: Grant
    Filed: November 6, 2018
    Date of Patent: May 19, 2020
    Assignee: SOGANG UNIVERSITY RESEARCH FOUNDATION
    Inventors: Hyung-Min Park, Minook Kim
  • Patent number: 10489856
    Abstract: A method of determining a hybrid index may include obtaining, by a computer device, financial transaction information about two or more financial products over a duration. The computer device may be configured to filter the financial transaction information to produce enhanced financial transaction information. The computer device may then determine a financial index value using the financial transaction information and the enhanced financial transaction information.
    Type: Grant
    Filed: December 19, 2013
    Date of Patent: November 26, 2019
    Assignee: Chicago Mercantile Exchange Inc.
    Inventors: Richard Co, John Nyhoff, John Kerpel, John Labuszewski, Fred Sturm
  • Patent number: 10454454
    Abstract: A partitioned block frequency domain adaptive filter device includes a frequency domain adaptive filter configured for filtering a frequency domain representation of a time domain input signal depending on a set of filter coefficients consisting of a plurality of blocks of filter coefficients in order to produce a filtered signal; a plurality of parallel arranged filter update blocks; wherein each of the filter update blocks includes an adaptation module configured for executing an adaptation sequence including the steps of calculating an approximation of a constrained gradient update for the filter coefficients of the respective block of filter coefficients, and calculating a cumulative error introduced on the unconstrained gradient update; wherein each of the filter update blocks includes a correction module configured for executing a correction sequence including the steps of calculating a corrected constrained gradient update for the filter coefficients of the respective block of filter coefficients.
    Type: Grant
    Filed: January 23, 2018
    Date of Patent: October 22, 2019
    Assignee: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
    Inventors: Maria Luis Valero, Emanuel Habets, Edwin Mabande, Anthony Lombard, Dirk Mahne, Bernhard Birzer
  • Patent number: 10455426
    Abstract: The present embodiments include methods of time-frequency analyzing signals. Some embodiments provide methods of processing signals comprising: adaptively partitioning at least a portion of a signal in a time domain into a plurality of segments of the signal; and transforming each of the segments of the signal producing respective expansions in a frequency domain and obtaining respective samples of the windows of signal in the frequency domain.
    Type: Grant
    Filed: September 23, 2016
    Date of Patent: October 22, 2019
    Assignee: AMERICAN UNIVERSITY
    Inventor: Stephen D. Casey
  • Patent number: 10366278
    Abstract: A method for processing data includes receiving a depth map of a scene containing at least a humanoid head, the depth map comprising a matrix of pixels having respective pixel depth values. A digital processor extracts from the depth map a curvature map of the scene. The curvature map includes respective curvature values of at least some of the pixels in the matrix. The curvature values are processed in order to identify a face in the scene.
    Type: Grant
    Filed: May 11, 2017
    Date of Patent: July 30, 2019
    Assignee: APPLE INC.
    Inventor: Yaron Eshet
  • Patent number: 10302036
    Abstract: A method and apparatus for operating an internal combustion engine is disclosed. A signal generated by the oxygen concentration sensor is converted into a first signal indicative of an air/fuel ratio in the engine cylinder. A second signal indicative of an expected air/fuel ratio in the engine cylinder due to a fuel injection is generated and filtered to obtain a filtered signal and used to operate the engine. The filtered signal is obtained by sampling values of the first and second signals. A time constant is calculated based on the sampled values of the first and second signals and a value of the first signal sampled during a preceding control cycle. A value of the filtered signal is calculated based on the calculated time constant, the sampled value of the second signal and a value of the filtered signal calculated during the preceding control cycle.
    Type: Grant
    Filed: June 9, 2016
    Date of Patent: May 28, 2019
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventor: Matteo Larocca
  • Patent number: 10225667
    Abstract: A method performs frequency-dependent reduction of noise in an input signal, wherein the input signal is allocated to a main signal path and to an auxiliary signal path. A filter bank separates the input signal into a plurality of frequency bands each having a certain bandwidth and center frequency. In the auxiliary signal path, the bandwidth of the signal component is reduced in each frequency band thus forming a reduced frequency band in each case. Wherein in each reduced frequency band, a reduction parameter is determined from the signal component of the input signal, and wherein in the main signal path in each frequency band, noise in the input signal is reduced by use of the reduction parameter in that frequency band.
    Type: Grant
    Filed: March 9, 2016
    Date of Patent: March 5, 2019
    Assignee: Sivantos Pte. Ltd.
    Inventor: Henning Puder
  • Patent number: 10171652
    Abstract: In accordance with an embodiment the method includes temporarily configuring the vector processor with a new set of vectoring coefficients during one or more selected symbol positions; restoring the current set of vectoring coefficients outside the one or more selected symbol positions; obtaining at least one error measure over respectively at least one line of the group of vectored lines during the one or more selected symbol positions; and determining a suitability indication for the new set of vectoring coefficients based on the obtained at least one error measure.
    Type: Grant
    Filed: November 12, 2015
    Date of Patent: January 1, 2019
    Assignee: ALCATEL LUCENT
    Inventors: Paschalis Tsiaflakis, Jochen Maes, Dirk Vanderhaegen, Geert Ysebaert, Wim Van Damme
  • Patent number: 9923575
    Abstract: Compression of multidimensional sonic data is disclosed. Example methods disclosed herein to compress input multidimensional sonic data include decorrelating the input multidimensional sonic data to determine decorrelated multidimensional sonic data. In some such examples, the input multidimensional sonic data has a plurality of dimensions corresponding to a respective plurality of azimuthal directions from which the input multidimensional sonic data was obtained. In such examples, the decorrelated multidimensional sonic data is decorrelated among the plurality of dimensions of the input multidimensional sonic data. Such example methods also include processing the decorrelated multidimensional sonic data to determine compressed data representative of the input multidimensional sonic data.
    Type: Grant
    Filed: February 14, 2013
    Date of Patent: March 20, 2018
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Jeehong Yang, Julius Kusuma
  • Patent number: 9837991
    Abstract: The adaptive filter for sparse system identification is an adaptive filter that uses an algorithm in the feedback loop that is designed to provide better performance when the unknown system model is sparse, i.e., when the filter has only a few non-zero coefficients, such as digital TV transmission channels and echo paths. The algorithm is a least mean square algorithm with filter coefficients updated at each iteration, as well as a step size that is also updated at each iteration. The adaptive filter may be implemented on a digital signal processor (DSP), an application-specific integrated circuit (ASIC), or by field-programmable gate arrays (FPGAs).
    Type: Grant
    Filed: May 29, 2015
    Date of Patent: December 5, 2017
    Assignee: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
    Inventors: Muhammad Omer Bin Saeed, Azzedine Zerguine
  • Patent number: 9754605
    Abstract: A multi-channel acoustic echo cancellation (AEC) system that includes a step-size controller that dynamically determines a step-size value for each channel and each tone index on a frame-by-frame basis. The system determines the step-size value based on a normalized squared cross-correlation (NSCC) between an estimated echo signal and an error signal, allowing the AEC system to converge quickly when an acoustic room response changes while providing stable steady-state error by avoiding misadjustments due to noise sensitivity and/or near-end speech. The step-size value can be determined using fractional weighting that takes into account a signal strength of each channel.
    Type: Grant
    Filed: June 9, 2016
    Date of Patent: September 5, 2017
    Assignee: AMAZON TECHNOLOGIES, INC.
    Inventor: Amit Singh Chhetri
  • Patent number: 9723404
    Abstract: A digital low pass filter for producing an output value given a target value includes a memory which stores a scaling factor, a previous output value, a previous intermediate value, and the target value; the difference between the target value and the previous output value is evaluated, and then multiplied by the scaling factor to produce an intermediate value; the previous intermediate value is multiplied by the scaling factor minus unity; the output value is evaluated by summing the previous output value, twice the intermediate value, and the previous intermediate value multiplied by the scaling factor minus unity; the output value is then stored in memory as the previous output value, and the intermediate value as the previous intermediate value, such that the filter provides a second-order response but requires fewer hardware multipliers than the direct form implementation of a second-order filter.
    Type: Grant
    Filed: August 24, 2016
    Date of Patent: August 1, 2017
    Assignee: Red Lion 49 Limited
    Inventor: Charles Henry Pickers
  • Patent number: 9680674
    Abstract: A receiver includes a static I/Q calibration block and a correlation/integration block. The static I/Q calibration block is configured to substantially eliminate mismatches between in-phase and quadrature components of a portion of the spectrum having associated I/Q mismatches that are relatively frequency-independent. The correlation/integration block is configured to substantially eliminate mismatches between the in-phase and quadrature components of portions of the spectrum having associated I/Q mismatches that are relatively frequency-dependent in accordance with a pair of signals generated by the static I/C calibration block.
    Type: Grant
    Filed: February 7, 2013
    Date of Patent: June 13, 2017
    Assignee: MaxLinear, Inc.
    Inventors: Curtis Ling, Shuang Yu
  • Patent number: 9414372
    Abstract: A method for speeding up a filter tracking speed includes scaling filter coefficients based at least in part on an uplink/downlink configuration in a time division duplex (TDD) or a multimedia broadcast single frequency network (MBSFN) system. The method also includes applying scaled filter coefficients during at least one downlink subframe to control a filter tracking speed.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: August 9, 2016
    Assignee: QUALCOMM INCORPORATED
    Inventors: Jun Won Choi, Huilin Xu, Raghu Narayan Challa
  • Patent number: 9324363
    Abstract: The present inventions are related to systems and methods for data processing, and more particularly to systems and methods for data detection. As one example, a data processing system is described that includes a variance calculation circuit operable to calculate a variance of a data input; and a branch metric calculation circuit operable to calculate a branch metric based at least in part on the variance.
    Type: Grant
    Filed: July 18, 2013
    Date of Patent: April 26, 2016
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventors: Weijun Tan, Shaohua Yang, Xuebin Wu
  • Patent number: 9299351
    Abstract: A method and apparatus of suppressing a vocoder noise are provided. The method includes receiving from a channel decoder a vocoder frame and first information, the first information indicating whether the vocoder frame has an error, generating speech data by performing voice decoding on the vocoder frame, determining whether a tonal noise has been detected in the speech data, if the first information indicates that the vocoder frame has an error, and attenuating the volume of the speech data and outputting the volume-attenuated speech data through a speaker, upon detection of the tonal noise in the speech data.
    Type: Grant
    Filed: August 9, 2013
    Date of Patent: March 29, 2016
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Won-Cheol Kim, Joon-Sang Ryu, Tae-Kyun Jung
  • Patent number: 9270512
    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: Grant
    Filed: November 14, 2014
    Date of Patent: February 23, 2016
    Assignee: MagnaCom Ltd.
    Inventors: Amir Eliaz, Ilan Reuven
  • Patent number: 9231561
    Abstract: A multi-stage adaptive filter is disclosed, which exhibits a smaller mean square error than in prior art adaptive filters. The adaptive filter selectively manipulates the weights, in multiple stages, so as to achieve a global minimum of the error function, such that the filtered signal has as small an error as possible.
    Type: Grant
    Filed: December 30, 2011
    Date of Patent: January 5, 2016
    Assignee: INTEL CORPORATION
    Inventor: Yang-Seok Choi
  • Patent number: 9225403
    Abstract: A transmission method and system for use in a base station of a mobile communication network. It provides a simple and efficient technique which improves the performance of prior art solutions for MIMO user equipments (especially in bad or medium radio conditions scenarios).
    Type: Grant
    Filed: March 26, 2013
    Date of Patent: December 29, 2015
    Assignee: VODAFONE IP LICENSING LIMITED
    Inventors: Brendan McWilliams, Yannick Le Pezennec
  • Patent number: 9219469
    Abstract: Various embodiments of the present invention provide systems and methods for calibrating a data processing circuit. For example, a method for calibrating a data processing circuit is discussed that includes providing a digital filter, providing a detector circuit, and providing an analog filter. Operation of the digital filter is at least in part governed by filter taps that correspond to a filter tap constraint value. Operation of the detector circuit is at least in part governed by a target parameter. Operation of the analog filter is at least in part governed by an analog parameter that is one of a plurality of analog parameters. The methods further include selecting a target parameter, and calculating the filter tap constraint value based on the target parameter. Combinations of the target parameter, the calculated filter tap constraint value, and each of the plurality of analog parameters are applied to identify the analog parameter.
    Type: Grant
    Filed: September 21, 2010
    Date of Patent: December 22, 2015
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventors: Haotian Zhang, Hongwei Song, Jingfeng Liu, Yu Liao
  • Patent number: 9203422
    Abstract: An event-driven tracking analog to digital converter (ADC) architecture is proposed. The proposed architecture has less sensitivity to amplifier and DAC non-linearity, reduces the swing and dynamic common-mode range requirement of the operational transconductance amplifier (OTA) and comparators, respectively.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: December 1, 2015
    Assignee: ECOLE POLYTECHIQUE FEDERALE DE LAUSANNE (EPFL)
    Inventors: Vahid Majidzadeh Bafar, Alexandre Schmid, Yusuf Leblebici
  • Patent number: 9185487
    Abstract: Systems and methods for noise suppression using noise subtraction processing are provided. The noise subtraction processing comprises receiving at least a primary and a secondary acoustic signal. A desired signal component may be calculated and subtracted from the secondary acoustic signal to obtain a noise component signal. A determination may be made of a reference energy ratio and a prediction energy ratio. A determination may be made as to whether to adjust the noise component signal based partially on the reference energy ratio and partially on the prediction energy ratio. The noise component signal may be adjusted or frozen based on the determination. The noise component signal may then be removed from the primary acoustic signal to generate a noise subtracted signal which may be outputted.
    Type: Grant
    Filed: June 30, 2008
    Date of Patent: November 10, 2015
    Assignee: Audience, Inc.
    Inventors: Ludger Solbach, Carlo Murgia
  • Patent number: 9179516
    Abstract: This invention relates to a color controlled light source comprising a plurality of colored light elements, and a plurality of (filtered) photo detectors, having different spectral characteristics covering all or most of the total spectrum of the light elements. The (filtered) photo detectors detect the light output of the light source, and generate corresponding detection signals. The light source further has a color control unit for generating driving signals to the light elements on the basis of the detection signals and a predetermined target color point of the light output of the light source, and a modulator for individual signature modulation of the driving signal to each one of said light elements. A corresponding demodulator is provided for demodulation of the detection signals and extraction, from each detection signal, of actual values of the light outputs of the light elements.
    Type: Grant
    Filed: October 23, 2007
    Date of Patent: November 3, 2015
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Eduard J. Meijer, John B. Mills, Volkmar Schulz, Bernd Ackerman, Lorenzo Feri, Hans M. B. Boeve
  • Patent number: 9172577
    Abstract: A method for performing orthogonal frequency division multiplexing (OFDM)/offset quantization amplitude modulation (OQAM) includes obtaining a data burst. The method includes performing weighted circularly convolved filtering modulation on the data burst to produce an output signal. The method further includes a first wireless device transmitting the output signal to a second wireless device. The second wireless device receives an input signal from the first wireless device, and the second wireless devices performs weighted circularly convolved demodulation filtering on the input signal to produce the data burst.
    Type: Grant
    Filed: September 24, 2013
    Date of Patent: October 27, 2015
    Assignee: Futurewei Technologies, Inc.
    Inventors: Mohammad-Javad Abdoli, Ming Jia, Jianglei Ma
  • Patent number: 9137398
    Abstract: A multi-core processor is used in a portable device that has first and second image sensors spaced from each other for capturing images of a scene from slightly different perspectives. The multi-core processor has a first image sensor interface for receiving data from the image sensor, a second image sensor interface for receiving data from the second image sensor, multiple processing units and, the four processing units and the first and second sensor interfaces being integrated onto a single chip. The processing units are configured to simultaneously process the data from the first and second image interfaces to generate stereoscopic image data.
    Type: Grant
    Filed: September 15, 2012
    Date of Patent: September 15, 2015
    Assignee: Google Inc.
    Inventor: Kia Silverbrook
  • Patent number: 9137056
    Abstract: Methods, systems, and computer readable media can be operable to dynamically determine an optimal number of equalizer taps to be used at an upstream receiver based upon existing conditions on an upstream channel. Pre-equalizer coefficients associated with an upstream channel can be used to determine an optimal number of equalizer taps to be used at an upstream receiver. The number of equalizer taps can be dynamically determined for an individual customer premise equipment device or for a plurality of customer premise equipment devices using the same upstream channel.
    Type: Grant
    Filed: April 8, 2014
    Date of Patent: September 15, 2015
    Assignee: ARRIS Enterprises, Inc.
    Inventors: Lawrence C. Spaete, Jr., Ayham Al-banna, Dmitriy Fridman, Carl L. Daun
  • Patent number: 9134857
    Abstract: An adaptive digital filtering method and apparatus for touch data in a touch system is described. Adaptive digital filtering involves estimating a signal-to-noise ratio (SNR) for stored touch data, and reducing a digital filter order if the SNR is high and increasing the digital filter order if the SNR is small.
    Type: Grant
    Filed: May 9, 2011
    Date of Patent: September 15, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jong-kang Park, Hae-yong Ahn, Yoon-kyung Choi
  • Patent number: 9112570
    Abstract: A tunable receiver system uses programmable notch filters to identify available channel pairs for transmitting and receiving data via a femtocell base station. In addition, one of the programmable notch filters may be used to suppress infiltration of the transmit path signal into the receiver path of the receiver device. The other programmable notch filter may be used to suppress a blocker signal identified by the receiver device.
    Type: Grant
    Filed: February 3, 2011
    Date of Patent: August 18, 2015
    Assignee: RF Micro Devices, Inc.
    Inventors: Nadim Khlat, Marcus Granger-Jones
  • Patent number: 9106775
    Abstract: A multi-core processor is used in a portable device that has first and second image sensors spaced from each other for capturing images of a scene from slightly different perspectives. The multi-core processor has a first image sensor interface for receiving data from the image sensor, a second image sensor interface for receiving data from the second image sensor, multiple processing units and, the four processing units and the first and second sensor interfaces being integrated onto a single chip. The processing units are configured to simultaneously process the data from the first and second image interfaces to generate stereoscopic image data.
    Type: Grant
    Filed: September 15, 2012
    Date of Patent: August 11, 2015
    Assignee: Google Inc.
    Inventor: Kia Silverbrook
  • Patent number: 9049066
    Abstract: A method and apparatus for communication in a system employing differing transmission protocols. It is determined whether a first time slot of one transmission protocol is adjacent to a second time slot of another transmission protocol, and if a first symbol within the first time slot is adjacent to a second symbol of the second time slot. A pilot power and/or a number of pilot sub-carriers or tones of the first symbol is increased and channel estimation is performed on the first symbol.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: June 2, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Ashok Mantravadi, Durga Prasad Malladi, Avneesh Agrawal, Anastasios Stamoulis
  • Patent number: 9020023
    Abstract: 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 domain equalization unit and which equalizes the received signal in a frequency domain, and performs control of switching between the time domain equalization unit and the frequency domain equalization unit. The present technique can be applied to, for example, equalize a signal of data transmitted by way of single carrier transmission or data transmitted by way of multicarrier transmission.
    Type: Grant
    Filed: May 15, 2012
    Date of Patent: April 28, 2015
    Assignee: Sony Corporation
    Inventors: Katsumi Takaoka, Naoki Yoshimochi, Hidetoshi Kawauchi, Ryo Hasegawa, Hirofumi Maruyama
  • Patent number: 9002918
    Abstract: An adaptive low pass filtering process with a filter delay DA is conducted in parallel with reference low pass filtering process with a filter delay DR which is greater than DA. The error is measured between a delayed version of the adaptive process output and the reference process output. Filter parameters of the adaptive process are controlled to minimize the error.
    Type: Grant
    Filed: March 2, 2012
    Date of Patent: April 7, 2015
    Assignee: Snell Limited
    Inventor: Michael James Knee
  • Patent number: 9002917
    Abstract: Provided is a system for generating coefficient values. The system may include a base function generator and a series of accumulators including a leading and a last accumulator. In the series of accumulators, the data output of each accumulator, except the last, may be coupled to the data input of a successive adjacent accumulator. The base function generator may be configured to output, to the leading accumulator, a series of data values that may correspond to a base function that is a specified order derivative of a filter function. Each accumulator may be configured to: add a data value currently at its data input to a currently stored data value to produce an updated data value that may correspond to a respective value of a specified order integral of the base function; store the updated data value in the accumulator; and output the updated data value at its data output.
    Type: Grant
    Filed: July 30, 2010
    Date of Patent: April 7, 2015
    Assignee: National Instruments Corporation
    Inventors: Hector Rubio, Garritt W. Foote
  • Patent number: 8984038
    Abstract: Aspects of a method and system for unconstrained frequency domain adaptive filtering include one or more circuits that are operable to select one or more time domain coefficients in a current filter partition. A value may be computed for each of the selected one or more time domain coefficients based on a corresponding plurality of frequency domain coefficients. The corresponding plurality of frequency domain coefficients may be adjusted based on the computed values. A subsequent plurality of frequency domain coefficients in a subsequent filter partition may be adjusted based on the computed values. Input signals may be processed in the current filter partition based on the adjusted corresponding plurality of frequency domain coefficients. A time-adjusted version of the input signals may be processed in a subsequent filter partition based on the adjusted subsequent plurality of frequency domain coefficients.
    Type: Grant
    Filed: November 22, 2013
    Date of Patent: March 17, 2015
    Assignee: Broadcom Corporation
    Inventors: Kuoruey (Ray) Han, Peiqing Wang, Linghsiao Wang, Kishore Kota, Arash Farhoodfar
  • Publication number: 20150074161
    Abstract: The least mean square method for estimation in sparse adaptive networks is based on the Reweighted Zero Attracting Least Mean Square (RZA-LMS) algorithm, providing estimation for each node in the adaptive network. The extra penalty term of the RZA-LMS algorithm is then integrated into the Incremental LMS (ILMS) algorithm. Alternatively, the extra penalty term of the RZA-LMS algorithm may be integrated into the Diffusion LMS (DLMS) algorithm.
    Type: Application
    Filed: September 9, 2013
    Publication date: March 12, 2015
    Applicant: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
    Inventors: MUHAMMAD OMER BIN SAEED, ASRAR UL HAQ SHEIKH
  • Patent number: 8977666
    Abstract: An adaptive filter is disclosed, having a plurality of computation groups, a plurality of computation circuits, a summation circuit, a slicer circuit, an updating circuit, and a control circuit. Each computation group corresponds to an equalization parameter and has a plurality of memory cells. When the corresponding equalization parameter of a computation group is greater than a predetermined value, the control circuit configures the computation group and the computation circuit to collaboratively generate an output of the computation group. The summation circuit sums up the outputs of the computation groups to produce a filter output. The slicer circuit generates a slicer output according to the filter output. The updating circuit updates the equalization parameters according to the filter output and the slicer output.
    Type: Grant
    Filed: September 27, 2012
    Date of Patent: March 10, 2015
    Assignee: Realtek Semiconductor Corp.
    Inventors: Cheng-Yi Huang, Yi-Lin Li
  • Patent number: 8976855
    Abstract: An exemplary receiver equalizer includes a first decision feedback equalizer (DFE) sampler coupled to a summer, the first DFE to latch an equalized output of the summer. The first branch includes a second DFE sampler coupled to the first DFE sampler, the second DFE to latch an output of the first DFE sampler. The first branch includes a third DFE sampler coupled to the second DFE sampler, the third DFE to latch an output of the second DFE sampler. The summer coupled to the first, second, and third DFE samplers of the first branch, the summer to integrate the output of said DFE samplers, the received signal, and equalized outputs from one or more other branches, wherein the integrating occurs over a plurality of unit intervals (UIs).
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: March 10, 2015
    Assignee: Intel Corporation
    Inventors: Mingming Xu, Stefano Giacconi
  • Patent number: 8953812
    Abstract: Improvements in voice signals transmitted within communication systems are obtained by use of adaptive filters, front and rear microphones, noise cancelling systems and other means and methods. Disclosed embodiments include the use of directional microphones, primary inputs, secondary inputs, adaptive weight generators, canceller outputs to improve signal to noise ratios and other communication attributes.
    Type: Grant
    Filed: July 20, 2013
    Date of Patent: February 10, 2015
    Inventor: Alon Konchitsky
  • Patent number: 8902964
    Abstract: Methods and apparatus for provision of equalization effort-balancing of transmit (TX) Finite Impulse Response (FIR) and receive (RX) Linear Equalizer (LE) or RX Decision Feedback Equalizer (DFE) structures in high-speed serial interconnects are described. In some embodiments, data corresponding to a plurality of transmit equalization values and a plurality of receive equalization values for each lane of a link having a plurality of lanes is detected. At least one of the plurality of the transmit equalization values and at least one of the plurality of the receive equalization values are selected for each lane of the plurality of lanes of the link based on detection of saturation in a Decision Feedback Equalizer (DFE) tap of a corresponding lane of the link. Other embodiments are also claimed and/or disclosed.
    Type: Grant
    Filed: September 29, 2012
    Date of Patent: December 2, 2014
    Assignee: Intel Corporation
    Inventors: Manuel A. Aguilar-Arreola, Eric J. Msechu
  • Patent number: 8879617
    Abstract: A method and a circuit for controlling an equalizer and an equalizing system are disclosed. The method includes providing a first level from a set of levels as a peaking level of the equalizer; equalizing a transmission signal by using the equalizer with the first level to obtain a first signal; providing a second level from the set of levels as the peaking level of the equalizer; equalizing the transmission signal by using the equalizer with the second level to obtain a second signal; determining a first frequency of the first signal; determining a second frequency of the second signal; comparing the first frequency and second frequency to obtain a comparing result; and determining the peaking level of the equalizer for following equalization of the transmission signal in accordance with the comparing result.
    Type: Grant
    Filed: November 15, 2013
    Date of Patent: November 4, 2014
    Assignee: Himax Technologies Limited
    Inventor: Jin-Fu Lin