Filtering Patents (Class 708/300)
  • Patent number: 10181332
    Abstract: Systems, methods, and apparatuses are presented herein for detecting and identifying unmanned aircraft systems (UAS) or drones. The system can include one or more UAS sensor nodes distributed about an area to be monitored. Each UAS sensor node can be communicably coupled to a central server but is able to conduct detection and identification procedures separate from the central server. The UAS sensor node can include a microphone that detects an audio signal generated within the area to be monitored. The node can convert the audio signal into a digital signal, can segment the audio signal, and can pass the signal through a bandpass filter. The node can also conduct a Fourier transform and smooth filtering on the digital audio signal before comparing the signal to multiple stored sample UAS audio signals for known UAS vehicles and motor stresses to determine a likelihood of a match.
    Type: Grant
    Filed: March 21, 2018
    Date of Patent: January 15, 2019
    Assignee: The Aerospace Corporation
    Inventors: Edward Aric Laag, Kiley Lauren Yeakel, Eric Bernard Wendoloski, Jason Laurence Tichy
  • Patent number: 10169084
    Abstract: The present invention provides a computer implemented method, system, and computer program product of deep learning via dynamic root solvers. In an embodiment, the present invention includes (1) forming an initial set of GPUs into an initial binary tree architecture, where the initial set includes initially idle GPUs and an initial root solver GPU as the root of the initial binary tree architecture, (2) calculating initial gradients and initial adjusted weight data, (3) choosing a first currently idle GPU as a current root solver GPU, (4) forming a current set of GPUs into a current binary tree architecture, where the current set includes the additional currently idle GPUs and the current root solver GPU as the root of the current binary tree architecture, (5) calculating current gradients and current adjusted weight data, and (6) transmitting an initial update to the weight data to the available GPUs.
    Type: Grant
    Filed: December 29, 2017
    Date of Patent: January 1, 2019
    Assignee: International Business Machines Corporation
    Inventor: Anto Ajay Raj John
  • Patent number: 10122371
    Abstract: A novel and useful apparatus for and method of software based phase locked loop (PLL). The software based PLL incorporates a reconfigurable calculation unit (RCU) that is optimized and programmed to sequentially perform all the atomic operations of a PLL or any other desired task in a time sharing manner. An application specific instruction-set processor (ASIP) incorporating the RCU includes an instruction set whose instructions are optimized to perform the atomic operations of a PLL. The RCU is clocked at a fast enough processor clock rate to insure that all PLL atomic operations are performed within a single PLL reference clock cycle.
    Type: Grant
    Filed: November 17, 2017
    Date of Patent: November 6, 2018
    Assignee: Texas Instruments Incorporated
    Inventors: Roman Staszewski, Robert B. Staszewski, Fuqiang Shi
  • Patent number: 10085106
    Abstract: A sound control device includes a sound collector for collecting a first sound signal generated from a noise source and deformed along a primary path between the noise source and a sound input unit, and a second sound signal generated through a speaker and deformed along a secondary path between the speaker and the sound input unit; and a sound controller for updating an adaptive filter in a designed adaptive control logic with at least one of the collected first and second sound signals and a preset target sound, and generating a sound effect that reflects the secondary path based on the updated adaptive filter.
    Type: Grant
    Filed: June 21, 2017
    Date of Patent: September 25, 2018
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventor: Kyoung Jin Chang
  • Patent number: 10003324
    Abstract: Data samples are filtered by using a digital filter where the length of an impulse response of the digital filter is finite, an impulse response of the digital filter is symmetric and the operation of the digital filter is multi-rate. The method uses a polyphase decomposition to break down the input data stream into N parallel substreams and the multi-rate digital filter is separated by a polyphase decomposition into multiple lower-rate sub-filters where each of the sub-filters is separated into a set of simpler sub-sub-filters which operate upon the same set of input samples and which have impulse responses which are jointly centro-symmetric, a set of pre-filtering arithmetic structures, and a set of post-filtering arithmetic structures and performing each such pair of sub-sub-filtering operations using a single shared filter structure, a set of pre-filtering combining adders, and a set of post-filtering separating adders.
    Type: Grant
    Filed: July 15, 2015
    Date of Patent: June 19, 2018
    Inventors: Brian Berscheid, Aroutchelvame Mayilavelane
  • Patent number: 9832293
    Abstract: A smartphone comprising: a liquid crystal panel having a display surface having a quadrangular display area defined therein; a cover panel; an input unit disposed so as to be located outside the display area such that one side section included in four side sections defining the display area is located between the input unit and the display area, the input unit converting input bone conduction sound transmitted through the cover panel into an input signal; and an output unit disposed so as to be located outside the display area such that the one side section included in the four side sections defining the display area and located between the display area and the input unit is located between the output unit and the display area, the output unit converting an output signal and transmitting the same as output bone conduction sound to the cover panel.
    Type: Grant
    Filed: June 3, 2015
    Date of Patent: November 28, 2017
    Inventor: Mikihiro Noma
  • Patent number: 9784959
    Abstract: Unnecessary degradation of a light detector is prevented.
    Type: Grant
    Filed: February 26, 2014
    Date of Patent: October 10, 2017
    Inventor: Nobuhiro Takamizawa
  • Patent number: 9762249
    Abstract: A reconfigurable, digital phase-locked loop integrated circuit is disclosed which is coupleable to a reference frequency generator. A representative embodiment may include a memory storing a plurality of configuration parameters, at least one configuration parameter of specifying an output frequency; a reconfigurable frequency and delay generator configurable and reconfigurable in response to the configuration parameters to generate an output signal having the output frequency; and a digital controller adapted to access the memory and retrieve the plurality of configuration parameters, and to generate a plurality of control signals to the reconfigurable frequency and delay generator both to generate the output signal having the output frequency in response to the plurality of configuration parameters, and to match a phase of the output signal to an input signal phase.
    Type: Grant
    Filed: July 29, 2016
    Date of Patent: September 12, 2017
    Assignee: Movellus Circuits, Inc.
    Inventors: Muhammad Faisal, Jeffrey Alan Fredenburg, David Michael Moore
  • Patent number: 9660624
    Abstract: Circuitry that efficiently implements loop functions in an integrated circuit is provided. The circuitry combines a feed-forward circuit with a feedback loop that includes a unit delay element in a feedback path. The feedback path may couple the output of a processing element to the input of the processing element. The processing element may implement a function that satisfies commutative, associative, and distributive properties. Combining the feedback loop with the feed-forward circuit may allow for register retiming in the feedback loop and for register pipelining with optional register retiming in the feed-forward circuit. The circuitry may thus trade off an increase in throughput and clock frequency for additional resources.
    Type: Grant
    Filed: March 21, 2014
    Date of Patent: May 23, 2017
    Assignee: Altera Corporation
    Inventors: Nima Safari, Volker Mauer, Shahin Gheitanchi
  • Patent number: 9641157
    Abstract: A method and device are provided for filtering digital audio signals using at least one ARMA filter, particularly during a filter change. The method includes the following steps: a step of receiving a first request to change filtering to or from filtering by a first ARMA filter; and, in response to the first request, a step of gradually switching, at each of a plurality of cascaded first filtering blocks, between digital-signal filtering by a first basic filtering cell and digital-signal filtering by another associated basic filtering cell, the first basic filtering cells of the plurality of first filtering blocks factorizing the first filter.
    Type: Grant
    Filed: March 14, 2012
    Date of Patent: May 2, 2017
    Assignee: ORANGE
    Inventors: Alexandre Guerin, Julien Faure, Claude Marro
  • Patent number: 9641359
    Abstract: A system including first and second filters and an adaptation engine. The first filter includes first taps that receive first coefficients and filters a digital signal to generate a first filtered signal. One of the first coefficients is constrained, such that the one of the first coefficients are not updated and phase and gain errors are introduced. The second filter includes second taps that receive second coefficients and filters the first filtered signal to generate a second filtered signal. The second coefficients include first and second coefficients. The adaptation engine, based on the one of the first coefficients, updates: the first coefficient to set a phase of the second filter; and the second coefficient to set a gain of the second filter. The phase of the second filter corresponds to a change in the phase error. The gain of the second filter corresponds to a change in the gain error.
    Type: Grant
    Filed: April 14, 2016
    Date of Patent: May 2, 2017
    Inventor: Pantas Sutardja
  • Patent number: 9626953
    Abstract: A vehicle audio system includes: a tune knob configured to select a frequency of a desired radio broadcast; a microcomputer configured to detect a broadcast frequency input through the tune knob and to determine an optimal sampling frequency of a full digital amplifier based on the detected broadcast frequency; a tuner configured to receive only a broadcast signal corresponding to the frequency selected through the tune knob; and the full digital amplifier configured to generate a digital signal by sampling the broadcast signal received by the tuner at the optimal sampling frequency determined by the microcomputer and to amplify and output the generated digital signal.
    Type: Grant
    Filed: December 14, 2014
    Date of Patent: April 18, 2017
    Assignee: Hyundai Motor Company
    Inventors: Seung Hai Hwang, Ji Sun Go, Young Kim
  • Patent number: 9621131
    Abstract: Systems and methods are provided for an adjustable filter engine. In particular, an electronic system is provided that can include a focus module, memory, and control circuitry. In some embodiments, the focus module can include an adjustable filter engine and a motor. By using the adjustable filter engine to generate a filter with a large number of filter coefficients, the control circuitry can accommodate a variety of system characteristics. For example, by generating a set of cumulative coefficients and re-arranging the order of the cumulative coefficients, the control circuitry can reduce the bit-width requirements of the adjustable filter engine hardware. For instance, the control circuitry can reduce the number of multipliers required to perform a convolution between an updated filter and one or more input signals. In some embodiments, the updated filter can be generated to reduce oscillations of the motor movement due to a new position request.
    Type: Grant
    Filed: May 20, 2014
    Date of Patent: April 11, 2017
    Inventor: Chihsin Wu
  • Patent number: 9607626
    Abstract: A reconfigurable filter bank system that has an asymmetrical tree structure with multiple stages to generate multiband outputs. Each stage may include cascaded low-pass filters (LPFs), cascaded high-pass filters (HPFs) and/or all-pass filter(s) (APF(s)) having identical phase responses. As the cascaded LPFs, cascaded HPFs and APF(s) have identical phase responses, each frequency band of the multiband output may have an identical phase shift such that the frequency bands are in-phase and can be added together. The multiband outputs of the reconfigurable filter bank may have near-perfect reconstruction (e.g., small number of cross-band ripples) and therefore only minor distortion. In addition, the number of frequency bands and corresponding non-uniform bandwidths (e.g., frequency ranges) may be user-adjustable and/or reconfigurable during device operation. Further, the reconfigurable filter bank may have reduced computational complexity and/or latency.
    Type: Grant
    Filed: March 28, 2016
    Date of Patent: March 28, 2017
    Inventors: Jun Yang, Colin Randall McEnroe, Jian Guo
  • Patent number: 9603153
    Abstract: Methods and apparatuses are provided for graphically displaying the noise level on each WLAN channel, along with the arrangement of other (neighboring) wireless host devices on each channel with their respective signal strengths as a distance indicator. As a result, collected information may be gathered and displayed intuitively to allow a user to quickly assess the environment and manually configure the wireless host device. In addition, methods and apparatuses are provided for suggesting to a user or automatically selecting a wireless host device configuration based on the noise level on each WLAN channel and the arrangement of other wireless host devices on each channel with consideration of their respective signal strengths. As a result, an optimal configuration for a deployed wireless host device may be determined and consistently suggested or automatically configured.
    Type: Grant
    Filed: October 24, 2013
    Date of Patent: March 21, 2017
    Assignee: Netgear, Inc.
    Inventors: Jonathan Daub, Patrick Lazar
  • Patent number: 9584306
    Abstract: An embodiment of the invention relates to a method of phase detection in a receiver circuit with decision feedback equalization. Partial-equalization and full-equalization edge signals are generated. The feedback from the first tap of the decision feedback equalizer is separated from the feedback of the remaining plurality of taps. The feedback from the plurality of taps (not including the first tap) is used to generate partial-equalization edge signals, while the feedback from all the taps is used to generate full-equalization edge signals. The partial-equalization and full-equalization edge signals are utilized by phase-detection circuitry to provide highly-accurate data sampling locations for improved performance.
    Type: Grant
    Filed: June 18, 2015
    Date of Patent: February 28, 2017
    Assignee: Altera Corporation
    Inventors: Wenyi Jin, Jihong Ren, Hae-Chang Lee
  • Patent number: 9577608
    Abstract: A discrete time (DT) lowpass filter having various advantages is described. In an exemplary design, the DT lowpass filter includes a decimating DT filter (which may include a passive DT FIR filter and/or a passive DT IIR filter) and an active DT filter. The decimating DT filter receives a first DT signal at a first sample rate, filters and decimates the first DT signal by a factor of N, and provides a second DT signal at a second sample rate lower than the first sample rate. N may be greater than one. The active DT filter filters the second DT signal and provides a third DT signal at the second sample rate. A sampler samples a continuous time signal and provides the first DT signal. The sampler may further double the voltage of the first DT signal relative to the voltage of the continuous time signal.
    Type: Grant
    Filed: August 14, 2009
    Date of Patent: February 21, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Russell John Fagg, Joseph Patrick Burke
  • Patent number: 9547674
    Abstract: A data normalization system is described herein that represents multiple data types that are common within database systems in a normalized form that can be processed uniformly to achieve faster processing of data on superscalar CPU architectures. The data normalization system includes changes to internal data representations of a database system as well as functional processing changes that leverage normalized internal data representations for a high density of independently executable CPU instructions. Because most data in a database is small, a majority of data can be represented by the normalized format. Thus, the data normalization system allows for fast superscalar processing in a database system in a variety of common cases, while maintaining compatibility with existing data sets.
    Type: Grant
    Filed: January 13, 2014
    Date of Patent: January 17, 2017
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Aleksandras Surna, Erik Ismert, Srikumar Rangarajan, Nimish S. Khanolkar
  • Patent number: 9543917
    Abstract: The disclosed embodiment may be a parametric equalization hardware that is coupled to computer readable memory software configured to present a command interface to a user and control the equalization hardware to manipulate the frequency, Q, and gain. Additionally, software is configured to simultaneously vary the Q and gain of an equalization curve between two preset values defined by: (1) a high gain and narrow Q (“Fire”); and (2) low gain and wide Q (“Water”).
    Type: Grant
    Filed: January 26, 2015
    Date of Patent: January 10, 2017
    Inventor: Fabrice Gabriel Paumier
  • Patent number: 9530425
    Abstract: A system and method for representing quasi-periodic (“qp”) waveforms, for example, representing a plurality of limited decompositions of the qp waveform. Each decomposition includes a first and second amplitude value and at least one time value. In some embodiments, each of the decompositions is phase adjusted such that the arithmetic sum of the plurality of limited decompositions reconstructs the qp waveform. Data-structure attributes are created and used to reconstruct the qp waveform. Features of the qp wave are tracked using pattern-ecognition techniques. The fundamental rate of the signal (e.g., heartbeat) can vary widely, for example by a factor of 2-3 or more from the lowest to highest frequency. To get quarter-phase representations of a component (e.g., lowest frequency “rate” component) that varies over time (by a factor of two to three) many overlapping filters use bandpass and overlap parameters that allow tracking the component's frequency version on changing quarter-phase basis.
    Type: Grant
    Filed: March 17, 2014
    Date of Patent: December 27, 2016
    Assignee: Vios Medical Singapore Pte. Ltd.
    Inventors: Carlos A. Ricci, Vladimir V. Kovtun
  • Patent number: 9467954
    Abstract: Disclosed are a power adjustment method and an apparatus based on low delay power detection before digital pre-distortion. The method comprises the following steps: according to pre-configured system carrier information, obtaining effective carrier information containing an effective carrier channel corresponding to each effective carrier; performing sampling on carrier data of each effective carrier channel according to the obtained effective carrier information, and then calculating combination power Pa of effective carriers before digital up conversion or digital peak clipping cancellation according to the sampling; and using the combination power Pa of the effective carriers to perform power adjustment before digital pre-distortion. The present invention moves power calculation ahead of an up conversion module, fully utilizes inherent delay of digital up conversion and a peak clipping module to offset time required for the power calculation, and effectively reduces system delay.
    Type: Grant
    Filed: October 14, 2013
    Date of Patent: October 11, 2016
    Assignee: ZTE Corporation
    Inventors: Zhen Cao, Hao Qiu, Wei Chen, Cong Xiao, Xuelong Yuan
  • Patent number: 9467174
    Abstract: A high-order syndrome calculator includes a serial-to-parallel converter configured to convert serial bit sequences received from a transmitter to a parallel multi-stream, an exclusive OR (XOR) operator configured to perform an XOR operation on bit values of the multi-stream, a zero interpolator configured to insert zero values between the bits on which the XOR operation is performed, and a linear feedback shift register configured to calculate a high-order syndrome value based on a coefficient of a remainder obtained by dividing, by a primitive polynomial, a polynomial generated from the multi-stream in which the zero values are inserted.
    Type: Grant
    Filed: September 29, 2014
    Date of Patent: October 11, 2016
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Chang Soon Park, Hyo Sun Hwang, Young Jun Hong
  • Patent number: 9432077
    Abstract: Embodiments of the invention provide a method to detect DSSS preambles in smart utility networks. A DSSS signal is received by a receiver and a digital sequence of samples is formed. A difference value is calculated between pairs of samples in the digital sequence of samples to form a sequence of differential values. A known preamble differential value sequence is correlated with the sequence of differential values to form a sequence of correlation values. A location of the preamble is located in the digital sequence of samples corresponding to a peak in the sequence of correlation values that exceeds a threshold value.
    Type: Grant
    Filed: February 7, 2013
    Date of Patent: August 30, 2016
    Assignee: Texas Instruments Incorporated
    Inventor: Timothy Mark Schmidl
  • Patent number: 9432112
    Abstract: Examples of a system and method for adaptively tuning a radio frequency (RF) front-end are generally described herein. In some examples, the frequency of a transmit signal of RF front-end circuitry is swept in at least a part of the RF transmit band. RF power in a receiver is detected as a function of the RF frequency of the transmit signal to determine a location of at least one tunable notch or other band stop element in the frequency domain. Information from the detected RF power is determined as a function of the RF frequency of the transmit signal. The RF front-end circuitry is adjusted to a selected frequency response using the determined information.
    Type: Grant
    Filed: December 17, 2013
    Date of Patent: August 30, 2016
    Assignee: Intel IP Corporation
    Inventors: Poul Olesen, Peter Bundgaard, Mikael Bergholz Knudsen
  • Patent number: 9350163
    Abstract: A device includes interface circuitry. The interface circuitry receives first input signals related to measurements of characteristics of electricity passing through a first power line. The device includes filtering circuitry that filters the first input signals to generate filtered data. The device also includes a processor that estimates an oscillation frequency of the filtered data via a time-domain frequency estimation method.
    Type: Grant
    Filed: October 19, 2011
    Date of Patent: May 24, 2016
    Assignee: General Electric Company
    Inventors: Zhiying Zhang, Ilia Voloh, Jorge Eduardo Cardenas Medina
  • Patent number: 9313078
    Abstract: A method relates generally to data transmission. In such a method, a peak detector detects a signal peak of an input signal exceeding a threshold amplitude. This detecting includes sampling the input signal at a sampling frequency to provide a sampled signal. The sampling frequency is in a range greater than a bandwidth frequency of a carrier signal used for providing the input signal and less than twice the bandwidth frequency. Samples of the sampled signal proximate to the signal peak are interpolated to provide a reconstructed peak. A cancellation pulse is applied by a cancellation pulse generator to the samples to reduce the signal peak. A version of the input signal is output after application of the cancellation pulse.
    Type: Grant
    Filed: April 9, 2015
    Date of Patent: April 12, 2016
    Assignee: XILINX, INC.
    Inventors: Kaushik Barman, Gregory C. Copeland
  • Patent number: 9231522
    Abstract: A method for generating a signal having a defined bandwidth and a desired crest factor is disclosed. The signal is composed of a number of individual sinusoidal signals, each having an amplitude and a frequency. The method includes determining an exponent to be used in a specific exponential function and corresponding to the desired crest factor, the exponent being determined based on an a priori known relationship between crest factor and exponent; calculating a phase value for each sinusoidal signal using the specific exponential function and the previously determined exponent; and superposing the sinusoidal signals to obtain the signal having the desired crest factor, whereby the phases of the individual signals are maintained.
    Type: Grant
    Filed: October 5, 2012
    Date of Patent: January 5, 2016
    Assignee: Harman International Industries Ltd.
    Inventor: Vladimir Gontcharov
  • Patent number: 9224479
    Abstract: A method is disclosed for setting or modifying a threshold voltage in a NAND flash memory, using an optimization method and based on an error, such as stored in a threshold voltage table. In an embodiment, a method is provided to optimize the read voltage on a NAND flash memory in order to minimize the errors on the NAND flash memory in the fewest reads operations as possible. Advantageously, the method of the present disclosure is more reliability as the method minimizes a Raw Bit Error Rate (RBER) on the NAND flash memory. In an embodiment, a NAND controller adjusts an existing cell read threshold voltage for a selected cell, using an iterative optimization method, based on a difference between first and second error rates, or a difference between first and second probabilities, to generate an adjusted cell read threshold voltage.
    Type: Grant
    Filed: December 18, 2013
    Date of Patent: December 29, 2015
    Assignee: PMC-Sierra US, Inc.
    Inventors: Stephen Bates, Ognjen Katic
  • Patent number: 9225315
    Abstract: A digital filter having improved attenuation characteristics is disclosed. The disclosed performs upsampling of model filter response by applying a sampling kernel scaled by a sampling constant. The disclosed filter has good attenuation characteristics with small number of taps and pass bands of the digital filter can be changed with simple parameter variation.
    Type: Grant
    Filed: February 28, 2011
    Date of Patent: December 29, 2015
    Assignee: Industry-University Cooperation Foundation Hanyang University
    Inventors: Sang-Won Nam, Kyoung-Jae Kim, Sung-Il Jung
  • Patent number: 9191043
    Abstract: A digital filter bank includes a first sample and hold unit, one or more second sample and hold units one or more quantizers and one or more polyphase component filters. In another aspect, a digital filter bank includes a first sample and hold unit, a discrete time commutator and one or more polyphase component filters. In another aspect, a method for digitally filtering a signal includes sampling an input signal at a first frequency, sampling and holding the first sampled signal at a second frequency, quantizing the one or more second sampled signals to output channelized signals, and filtering the one or more quantized signals and outputting one or more filtered signals using one or more polyphase component filters.
    Type: Grant
    Filed: November 7, 2013
    Date of Patent: November 17, 2015
    Assignee: HRL Laboratories, LLC
    Inventors: Deying Zhang, Mohiuddin Ahmed
  • Patent number: 9167185
    Abstract: A transmission and reception apparatus, system for transmitting and receiving signals, and method for transmitting and receiving signals are disclosed. In one example, a transmitting part produces an output signal including a first digitally modulated signal. A receiving part includes a mixer circuit and receives an input signal including a second digitally modulated signal. A folding signal may be present as a function of the first digitally modulated signal and a clock signal used to produce the first digitally modulated signal. The mixer circuit performs frequency down conversion on the input signal, and may also be configured to perform a harmonic wave removal function on the input signal that reduces the presence of the folding signal from the input signal. The receiving part may further include a filter circuit that receives the frequency-down-converted input signal from the mixer circuit and selects a predetermined reception signal from the frequency-down-converted input signal.
    Type: Grant
    Filed: November 20, 2012
    Date of Patent: October 20, 2015
    Assignee: Sony Corporation
    Inventors: Hitoshi Tomiyama, Nobuhisa Ozawa, Yuya Kondo
  • Patent number: 9142125
    Abstract: Described herein is a framework to facilitate traffic prediction. In accordance with one aspect, training data including historical traffic information and precipitation data is received. An impulse response function may be determined based on the training data. One or more traffic parameters may be predicted by calculating a weighted linear system model based on the impulse response function.
    Type: Grant
    Filed: May 21, 2014
    Date of Patent: September 22, 2015
    Assignee: SAP SE
    Inventor: Haiyun Lu
  • Patent number: 9117312
    Abstract: Systems and methods are disclosed for altering character body animations to improve subsequent cloth animations. In particular, based on a character body animation, an extra level of processing is performed, prior to the actual cloth simulation. The extra level of processing removes potential areas of pinching or tangling in input character body simulation data, ensuring that the output of the cloth simulation will be have reduced pinches and tangles.
    Type: Grant
    Filed: October 7, 2010
    Date of Patent: August 25, 2015
    Inventor: David Tonnesen
  • Patent number: 9099989
    Abstract: A frequency reconfigurable digital filter and an equalizer using the same are disclosed. The digital filter includes a sampling kernel storage section configured to store a sampling kernel for performing upsampling of a model filter response scaled by a sampling constant and generating response of Multi images which are repeatedly formed with a constant period; a complementary conversion section configured to generate response of Multi complementary images repeatedly formed with constant period in frequency domain where the Multi images are not generated, the Multi complimentary images having the same characteristic as the Multi images; and an image response operation section configured to operate response of an image corresponding to a selected band among the Multi complementary images and the Multi images. The filter reconfigures frequency to realize various band pass characteristics only through changing very small number of parameter, and a user may change easily band of the filter.
    Type: Grant
    Filed: February 28, 2011
    Date of Patent: August 4, 2015
    Assignee: Industry-University Cooperation Foundation Hanyang University
    Inventors: Sang-Won Nam, Kyoung-Jae Kim, Sung-II Jung
  • Patent number: 9100662
    Abstract: A system and method for adaptive motion filtering to improve subpel motion prediction efficiency of interframe motion compensated video coding is described. The technique uses a codebook approach that is efficient in search complexity to look-up best motion filter set from a pre-calculated codebook of motion filter coefficient set. In some embodiments, the search complexity is further reduced by partitioning the complete codebook into a small base codebook and a larger virtual codebook, such that the main calculations for search only need to be performed on the base codebook.
    Type: Grant
    Filed: May 5, 2014
    Date of Patent: August 4, 2015
    Assignee: Intel Corporation
    Inventors: Atul Puri, Daniel Socek, Chang-Kee Choi
  • Patent number: 9100253
    Abstract: A method and apparatus for a radio base station (200) generates a multicarrier communication signal having a reduced crest factor by processing a block of samples (231) with a peak search window (271) to identify and suppress signal peaks exceeding a power threshold value.
    Type: Grant
    Filed: August 7, 2012
    Date of Patent: August 4, 2015
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Jayakrishnan C. Mundarath, Leo G. Dehner, Jayesh H. Kotecha, Peter Z. Rashev
  • Patent number: 9087003
    Abstract: A method and apparatus may be used to generate complex exponentials for either frequency domain or time domain applications by programming input parameter values into a complex exponential vector generator (260) having a frequency generator stage (281) and a vector phase accumulator stage (282) arranged with a vector element multiplier stage (283) to generate complex exponential phase index values (?0, ?1, . . . ?v?1) that are processed by a complex exponential generator stage (284) to output a plurality of complex exponential values (e.g., ej2??0, ej2??1, . . . ej2??v?1) that may be rearranged by a permutation unit (286) for use by vector data path.
    Type: Grant
    Filed: November 1, 2012
    Date of Patent: July 21, 2015
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Leo G. Dehner, Oded Yishay
  • Patent number: 9065425
    Abstract: A method and system for providing a finite impulse response, FIR, filter in a power amplification system are disclosed. An FIR filter includes a first signal path having a first delay, ?1. The first signal path is configured to receive an output from a power amplifier. A second signal path is in parallel with the first signal path has a second delay, ?2, and a first scalar multiplier, ?1. A third signal path in parallel with the first and second signal paths has a third delay, ?3, and a second scalar multiplier, ?2. The second and third signal paths are configured to receive a sum of the output of the power amplifier and a reference signal. Delays ?1, ?2, and ?3 are integer multiples of a period of time. An output is a sum of a signal from each of the first, second and third signal paths.
    Type: Grant
    Filed: March 27, 2013
    Date of Patent: June 23, 2015
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventor: Mark William Wyville
  • Patent number: 9055462
    Abstract: To provide a mobile communication terminal test device that can generate a signal with amplitude-frequency characteristics or phase-frequency characteristics which are changed over time. A mobile communication terminal test device 10 includes a data generation unit 12 that generates a bit stream, a sub-carrier generation unit 31 that receives bit stream data and performs, for example, predetermined encoding, symbol mapping, or sub-carrier mapping to convert the received data into a plurality of sub-carriers based on an OFDM modulation system, a frequency characteristic storage unit 13 that stores table data for predetermined amplitude-frequency characteristics and phase-frequency characteristics, and a frequency characteristic calculation unit 32 that sets the amplitude and phase of each sub-carrier input from the sub-carrier generation unit 31 on the basis of the table data.
    Type: Grant
    Filed: January 30, 2014
    Date of Patent: June 9, 2015
    Inventor: Akihiko Suenaga
  • Patent number: 9042501
    Abstract: A receiving circuit, use, and method for receiving an encoded and modulated radio signal is provided. The circuit comprise a demodulator and a digital filter connected downstream of the demodulator for moving averaging. The filter has at least two FIFO registers and subtractors. Whereby for subtracting an output value of the FIFO register from an input value of the FIFO register a subtractor is connected to each FIFO register. Wherein the filter has a weighting unit, which is connected downstream of each FIFO register, and wherein the filter has an integrator, which is connected downstream of the subtractors for integration.
    Type: Grant
    Filed: November 14, 2013
    Date of Patent: May 26, 2015
    Assignee: Atmel Corporation
    Inventor: Ulrich Grosskinsky
  • Patent number: 9036459
    Abstract: In this application, a set of orthogonal functions is introduced whose power spectral densities are all rectangular shape. To find the orthogonal function set, it was considered that their spectrums (Fourier transforms of the functions) are either real-valued or imaginary-valued, which are corresponding to even and odd real-valued time domain signals, respectively. The time domain functions are all considered real-valued because they are actually physical signals. The shape of the power spectral densities of the signals are rectangular thus, the Haar orthogonal function set can be employed in the frequency domain to decompose them to several orthogonal functions. Based on the inverse Fourier transform of the Haar orthogonal functions, the time domain functions with rectangular power spectral densities can be determined. This is equivalent to finding the time-domain functions by taking the inverse Fourier transform of the frequency domain Walsh functions.
    Type: Grant
    Filed: March 15, 2010
    Date of Patent: May 19, 2015
    Inventor: Ashkan Ashrafi
  • Patent number: 9036752
    Abstract: A method of frequency-domain filtering is provided that includes a plurality of filters, the plurality of filters including at least one constrained filter(s) W=I, I and at least one unconstrained filter(s) W=1,K? The method includes cascading the W k=i,K unconstrained filter(s). A single constraint window C is applied to the cascaded W=i,K unconstrained filter(s). The W=1,I constrained filter(s) are cascaded with the constrained cascaded Wk=1,K unconstrained filter(s) to form a resulting filter Wll=C(W 1{circle around (x)} . . . {circle around (x)} W){circle around (x)} W . . . W. The frequency domain representation of the single constraint window C may be based, at least in part, on a time domain representation of a single constraint window C that has been circularly shifted such that the frequency domain representation of the constraint window matches a property of the frequency domain representation of the cascaded W=1,K unconstrained filters.
    Type: Grant
    Filed: May 5, 2011
    Date of Patent: May 19, 2015
    Inventors: Markus Buck, Tobias Wolff
  • Publication number: 20150127696
    Abstract: The present invention addresses the problem of reducing a circuit scale without causing a reduction in processing efficiency. This multi-stage filter processing method measures, at each stage, either the number of input data or the number of intermediate data that is generated by filter calculation processing during the stages before the final stage is reached. Coefficient data regulating for each stage the number of data sufficient to perform the filter calculation processing is held. Input data or the intermediate data that is generated in a current stage is held in a memory until the number of data reaches the number of data sufficient to perform the filter calculation processing in the current stage, on the basis of the coefficient data. When the number of data has reached the number of data sufficient to perform the filter calculation processing, the filter calculation processing for the current stage is performed on the input data or the intermediate data that was held.
    Type: Application
    Filed: December 19, 2012
    Publication date: May 7, 2015
    Applicant: NEC CORPORATION
    Inventor: Hiroyuki Igura
  • Patent number: 9021161
    Abstract: A data collection unit obtains physiological data from a subject interface on a subject. The subject interface can be connected to the data collection unit. When the subject interface is connected to the data collection unit, subject interface contacts on the subject interface make contact with data collection unit contacts on the data collection unit. Some of the data collection unit contacts are for communicating physiological data from the subject interface to the data collection unit. Some of the contacts are for powering the data collection unit upon the subject interface being connected to the data collection unit and for powering down the data collection unit upon the subject interface being disconnected from the data collection unit.
    Type: Grant
    Filed: November 2, 2011
    Date of Patent: April 28, 2015
    Assignee: Braemar Manufacturing, LLC
    Inventors: Erich Vlach, Charles Gropper
  • Patent number: 9008249
    Abstract: Techniques are provided which may be implemented using various methods and/or apparatuses in a device comprising a receiver to scan a spectral band of a received signal comprising a desired signal contribution to determine whether signal data associated with at least a sub-band of the spectral band further comprises at least one undesired signal contribution. In response to determining that the signal data comprises at least one undesired signal contribution, the mobile station may initiate at least one notch filter to affect the undesired signal contribution in subsequent signal data associated with the received signal.
    Type: Grant
    Filed: February 10, 2012
    Date of Patent: April 14, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Jie Wu, Emilija M. Simic, Timothy Paul Pals, Duong A. Hoang
  • 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: 8996597
    Abstract: Various embodiments of the present invention provide apparatuses and methods for filtering a digital signal with a Nyquist constrained digital finite impulse response filter. For example, an apparatus for filtering digital data is disclosed that includes a digital finite impulse response filter having a plurality of taps. The apparatus also includes a tap weight controller connected to the digital finite impulse response filter, operable to adjust a tap weight for each of a subset of the taps such that a magnitude of a Nyquist response of the digital finite impulse response filter remains within a constraint range.
    Type: Grant
    Filed: October 12, 2011
    Date of Patent: March 31, 2015
    Assignee: LSI Corporation
    Inventors: Yu Liao, Hongwei Song, Jingfeng Liu, Haotian Zhang
  • Patent number: 8996598
    Abstract: Systems and methods for latency compensation are disclosed. In one embodiment, a computer-based system for latency compensation in a dynamic system comprises a processor and logic instructions stored in a tangible computer-readable medium coupled to the processor which, when executed by the processor, configure the processor to receive at least first parameter data from a first sensor and second parameter data from a second sensor, direct the at least first parameter data and the second parameter data into a combining filter, receive additional parameter data about the dynamic system from at least one additional sensor, construct a model of latency effects on the first parameter data and the second parameter data, and use the model of latency effects to compensate for latency-based differences in the first parameter data and the second parameter data.
    Type: Grant
    Filed: June 15, 2012
    Date of Patent: March 31, 2015
    Assignee: The Boeing Company
    Inventor: Steven B. Krogh
  • Publication number: 20150088951
    Abstract: New hybrid filters are presented based on time and transform domain structures. The hybrid filters have a combined benefit from the advantages obtained by the time and transform domain structures. The overall efficiencies are drawn from combining the pre- and post-processing of the time domain and block based transform domain structures. Further improvements are obtained by interchanging block construction and transforms with linear operations in the pre- and post-processors. The hybrid structures apply to single input, single output, multiple input, and multiple output structures. For the multi input and multi output structures further improvements are obtained by having common processing blocks for the input(s) and common processing blocks for the output(s). They hybrid filters are also efficient in topologies where filter outputs are combined via linear operation(s) generating combined results.
    Type: Application
    Filed: December 3, 2014
    Publication date: March 26, 2015
    Inventor: Arthur Torosyan
  • Patent number: 8990279
    Abstract: A signal filter and accompanying methods. In one embodiment, the filter includes a first mechanism for receiving a first signal. A second mechanism employs one or more modified representations of the first signal to cancel one or more frequency components of the first signal, yielding an output signal in response thereto. In a more specific embodiment, the first mechanism includes a splitter for receiving the first signal and splitting the first signal onto a first path and a second path. The second mechanism further includes one or more delay modules and one or more phase shifters in the first path and/or the second path. One or more controllable amplifiers are optionally included in the first path and/or the second path. The one or more delay modules, phase shifters, or amplifiers are responsive to one or more control signals from a controller. The controller is adapted to modify behavior of the second mechanism so that the filter is characterized by a desired frequency response.
    Type: Grant
    Filed: December 17, 2012
    Date of Patent: March 24, 2015
    Assignee: Intersil Americas LLC
    Inventors: Wilhelm Steffen Hahn, Wei Chen