Patents by Inventor Farrokh Abrishamkar

Farrokh Abrishamkar 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: 9961575
    Abstract: A process of wireless communication for obtaining channel quality information alignment includes predicting a channel state of a future downlink subframe of a signal. The process also includes providing a base station with a set of parameters based on the predicted channel state. For example, a user equipment (UE) can obtain a recommended transport block size (RTBS) from the predictor process, and return the RTBS to the base station as one of the set of parameters.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: May 1, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Farrokh Abrishamkar, Chao Jin, Insung Kang, Surendra Boppana
  • Patent number: 9484974
    Abstract: The various embodiments include methods and apparatuses for canceling nonlinear interference during concurrent communication of multi-technology wireless communication devices. Nonlinear interference may be estimated using a multilayer perceptron neural network with Hammerstein structure by dividing an aggressor signal into real and imaginary components, augmenting the components by weight factors, executing a linear combination of the augmented components, and executing a nonlinear sigmoid function for the combined components at a hidden layer of multilayer perceptron neural network to produce a hidden layer output signal. At an output layer, hidden layer output signals may be augmented by weight factors, and the augmented hidden layer output signals may be linearly combined to produce real and imaginary components of an estimated jammer signal.
    Type: Grant
    Filed: September 9, 2015
    Date of Patent: November 1, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Sheng-Yuan Tu, Farrokh Abrishamkar, Parisa Cheraghi, Insung Kang, Reza Shahidi
  • Publication number: 20160072531
    Abstract: The various embodiments include methods and apparatuses for canceling nonlinear interference during concurrent communication of multi-technology wireless communication devices. Nonlinear interference may be estimated using a support vector regression interference filter by generating one or more aggressor kernels, augmenting the one or more kernels by weight factors, and executing a regression function of the augmented components, to produce an estimated jammer signals. At an output layer, estimated jammer signals may be linearly combined to produce an estimated nonlinear interference used to cancel the nonlinear interference of a victim signal.
    Type: Application
    Filed: September 9, 2015
    Publication date: March 10, 2016
    Inventors: Farrokh ABRISHAMKAR, Alexandre Pierrot, Sheng-Yuan Tu
  • Publication number: 20160071009
    Abstract: The various embodiments include methods and apparatuses for canceling nonlinear interference during concurrent communication of multi-technology wireless communication devices. Nonlinear interference may be estimated using a radial basis function neural network with Hammerstein structure by executing a radial basis function on aggressor signals at a hidden layer of the radial basis function neural network with Hammerstein structure to obtain hidden layer outputs, augmenting aggressor signal(s) by weight factors and, executing a linear combination of the augmented output, at an intermediate layer to produce a combined hidden layer outputs. At an output layer, a linear filter function may be executed on the hidden layer outputs to produce an estimated nonlinear interference used to cancel the nonlinear interference of a victim signal.
    Type: Application
    Filed: September 9, 2015
    Publication date: March 10, 2016
    Inventors: Farrokh ABRISHAMKAR, Sheng-Yuan Tu, Jilei Hou
  • Publication number: 20160072649
    Abstract: The various embodiments include methods and apparatuses for cancelling nonlinear interference during concurrent communication of multi-technology wireless communication devices. Nonlinear interference may be estimated using a minimum mean squares interference filter by generating aggressor kernels from the aggressor signals, augmenting the aggressor kernels by weight factors and executing a linear combination of the augmented output, at an intermediate layer to produce intermediate layer outputs. At an output layer, a linear filter function may be executed on the intermediate layer outputs to produce an estimated nonlinear interference used to cancel the nonlinear interference of a victim signal.
    Type: Application
    Filed: September 9, 2015
    Publication date: March 10, 2016
    Inventors: Sheng-Yuan TU, Farrokh Abrishamkar, Brian Clarke Banister, Roberto Rimini, lnsung Kang, Taesang Yoo
  • Publication number: 20160071007
    Abstract: The various embodiments include methods and apparatuses for canceling nonlinear interference during concurrent communication of multi-technology wireless communication devices. Nonlinear interference may be estimated using a radial basis function neural network with Hammerstein structure by executing a radial basis function on aggressor signals at a hidden layer of the radial basis function neural network with Hammerstein structure to obtain hidden layer outputs, augmenting aggressor signal(s) by weight factors and, executing a linear combination of the augmented output, at an intermediate layer to produce a combined hidden layer outputs. At an output layer, a linear filter function may be executed on the hidden layer outputs to produce an estimated nonlinear interference used to cancel the nonlinear interference of a victim signal.
    Type: Application
    Filed: September 9, 2015
    Publication date: March 10, 2016
    Inventors: Sheng-Yuan TU, Farrokh Abrishamkar, lnsung Kang, Roberto Rimini
  • Publication number: 20160071003
    Abstract: The various embodiments include methods and apparatuses for cancelling nonlinear interference during concurrent communication of dual-technology wireless communication devices. Nonlinear interference may be estimated using a multilayer perceptron neural network by augmenting aggressor signal(s) by weight factors, executing a linear combination of the augmented aggressor signals, and executing a nonlinear sigmoid function for the combined aggressor signals at a hidden layer of multilayer perceptron neural network to produce a hidden layer output signal. Multiple hidden layers may repeat the process for the hidden layer output signals. At an output layer, hidden layer output signals may be augmented by weight factors, and the augmented hidden layer output signals may be linearly combined to produce an estimated nonlinear interference used to cancel the nonlinear interference of a victim signal. The weight factors may be trained based on a determination of an error of the estimated nonlinear interference.
    Type: Application
    Filed: October 9, 2014
    Publication date: March 10, 2016
    Inventors: Farrokh Abrishamkar, Sheng-Yuan Tu, Yin Huang, Ori Shental, Insung Kang
  • Publication number: 20160071008
    Abstract: The various embodiments include methods and apparatuses for canceling nonlinear interference during concurrent communication of multi-technology wireless communication devices. Nonlinear interference may be estimated using a multi-model radial basis function neural network with Hammerstein structure by executing a radial basis function on aggressor signals at a hidden layer of the radial basis function neural network with Hammerstein structure to obtain hidden layer outputs, augmenting aggressor signal(s) by weight factors, infusing the hidden layer outputs by infusion factors, and, executing a linear combination of the augmented output, at an intermediate layer to produce a combined hidden layer outputs. At an output layer, a linear filter function may be executed on the hidden layer outputs to produce an estimated nonlinear interference used to cancel the nonlinear interference of a victim signal.
    Type: Application
    Filed: September 9, 2015
    Publication date: March 10, 2016
    Inventors: Sheng-Yuan Tu, Farrokh Abrishamkar, Insung Kang
  • Publication number: 20160072591
    Abstract: The various embodiments include methods and apparatuses for canceling nonlinear interference during concurrent communication of multi-technology wireless communication devices. Nonlinear interference may be estimated using a block least squares function interference filter by generating aggressor kernel matrices from the aggressor signals, augmenting the aggressor kernel matrices by weight factors and executing a linear combination of the augmented output, at an intermediate layer to produce intermediate layer outputs. At an output layer, a linear filter function may be executed on the intermediate layer outputs to produce an estimated nonlinear interference used to cancel the nonlinear interference of a victim signal.
    Type: Application
    Filed: September 9, 2015
    Publication date: March 10, 2016
    Inventors: Sheng-Yuan TU, Farrokh Abrishamkar, Brian Clarke Banister, Roberto Rimini, Nicholas Michael Carbone, Insung Kang
  • Publication number: 20160072543
    Abstract: The various embodiments include methods and apparatuses for canceling nonlinear interference during concurrent communication of multi-technology wireless communication devices. Nonlinear interference may be estimated using a multi-layer perceptron neural network with Hammerstein structure by dividing an aggressor signal into real and imaginary components, augmenting the components by weight factors, executing a linear combination of the augmented components, and executing a nonlinear sigmoid function for the combined components at a hidden layer of multi-layer perceptron neural network to produce a hidden layer output signal. At an output layer, hidden layer output signals may be augmented by weight factors, and the augmented hidden layer output signals may be linearly combined to produce real and imaginary components of an estimated jammer signal.
    Type: Application
    Filed: September 9, 2015
    Publication date: March 10, 2016
    Inventors: Farrokh Abrishamkar, Sheng-Yuan Tu, Parisa Cheraghi, lnsung Kang, Jeremy Stein
  • Publication number: 20160072590
    Abstract: The various embodiments include methods and apparatuses for canceling nonlinear interference during concurrent communication of multi-technology wireless communication devices. Nonlinear interference may be estimated using a multilayer perceptron neural network with Hammerstein structure by dividing an aggressor signal into real and imaginary components, augmenting the components by weight factors, executing a linear combination of the augmented components, and executing a nonlinear sigmoid function for the combined components at a hidden layer of multilayer perceptron neural network to produce a hidden layer output signal. At an output layer, hidden layer output signals may be augmented by weight factors, and the augmented hidden layer output signals may be linearly combined to produce real and imaginary components of an estimated jammer signal.
    Type: Application
    Filed: September 9, 2015
    Publication date: March 10, 2016
    Inventors: Sheng-Yuan TU, Farrokh Abrishamkar, Parisa Cheraghi, lnsung Kang, Reza Shahidi
  • Publication number: 20160072592
    Abstract: The various embodiments include methods and apparatuses for canceling nonlinear interference during concurrent communication of multi-technology wireless communication devices. Nonlinear interference may be estimated using a mixed-model block least squares/radial basis function neural network by generating aggressor kernels from the aggressor signals, augmenting the aggressor kernels by weight factors and executing a linear combination of the augmented output, at an intermediate layer to produce intermediate layer outputs. At an output layer, a linear filter function may be executed on the intermediate layer outputs to produce an estimated nonlinear interference used to cancel the nonlinear interference of a victim signal.
    Type: Application
    Filed: September 9, 2015
    Publication date: March 10, 2016
    Inventors: Sheng-Yuan TU, Farrokh ABRISHAMKAR, Brian Clarke BANISTER
  • Publication number: 20160014726
    Abstract: Apparatus and methods for wireless communication include receiving, in a time division synchronous code division multiple access (TD-SCDMA) network, a first number of symbols before a midamble, the midamble, and a second number of symbols after the midamble; determining first forward and backward probabilities for a first subset of the first number of symbols and second forward and backward probabilities for a second subset of the second number of symbols; determining first posterior probabilities for the first subset of the first number of symbols and second posterior probabilities for the second subset of the second number of symbols; determining a first target posterior probability and a second target posterior probability; detecting a first target symbol and a second target symbol; and determining a first channel estimate corresponding to the first target symbol and a second channel estimate corresponding to the second target symbol.
    Type: Application
    Filed: July 9, 2014
    Publication date: January 14, 2016
    Inventors: Farrokh ABRISHAMKAR, Sheng-Yuan TU, Insung KANG, Bahadir CANPOLAT, Lan LAN, Chien Chung LIN
  • Publication number: 20160014619
    Abstract: Methods and apparatus for managing interference are described and may include updating a covariance inverse value of a linear function to remove an effect on the linear function of a first set of channels associated with a first network entity, wherein the first set of channels are cancelled in response to performing a first cancellation procedure. Methods and apparatus for managing interference may further include performing a second cancellation procedure to cancel a second set of channels associated with a second network entity based at least in part on the updated covariance inverse value of the linear function.
    Type: Application
    Filed: October 24, 2014
    Publication date: January 14, 2016
    Inventors: Ming KANG, Wanlun Zhao, Insung Kang, Farrokh Abrishamkar
  • Publication number: 20160013877
    Abstract: Apparatus, methods, and computer program product for wireless communication, including receiving a plurality of chips in a time division synchronous code division multiple access (TD-SCDMA) network; performing channel matched filtering, despreading, and descrambling on the plurality of chips to determine a plurality of received symbols for each of a plurality of cells; performing symbol-level inter-cell interference cancellation on the plurality of received symbols to determine a plurality of serving cell symbol estimates; and performing multi-user detection on the plurality of serving cell symbol estimates to determine a plurality of detected serving cell symbols.
    Type: Application
    Filed: July 9, 2014
    Publication date: January 14, 2016
    Inventors: Sheng-Yuan TU, Farrokh ABRISHAMKAR, Venkata Gautham CHAVALI, Bahadir CANPOLAT, Insung KANG, Ming KANG, Hari SANKAR, Aamod Dinkar KHANDEKAR
  • Publication number: 20150373568
    Abstract: A process of wireless communication for obtaining channel quality information alignment includes predicting a channel state of a future downlink subframe of a signal. The process also includes providing a base station with a set of parameters based on the predicted channel state. For example, a user equipment (UE) can obtain a recommended transport block size (RTBS) from the predictor process, and return the RTBS to the base station as one of the set of parameters.
    Type: Application
    Filed: March 15, 2013
    Publication date: December 24, 2015
    Inventors: Farrokh Abrishamkar, Chao Jin, Insung Kang, Surendra Boppana
  • Patent number: 9160577
    Abstract: Systems and methods of receiving data in a communication system are disclosed. The methods include equalizing a plurality of samples to suppress intersymbol interference and provide a first set of detected bits based on a first set of reference bits comprising a training sequence on a first iteration. The methods further include suppressing co-channel interference in the plurality of input samples and provide a set of suppressed samples based on a second set of reference bits comprising the first set of detected bits on a second iteration. The methods further include equalizing the set of suppressed samples to suppress intersymbol interference and provide a second set of detected bits based on the second set of reference bits on the second iteration.
    Type: Grant
    Filed: April 30, 2009
    Date of Patent: October 13, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Divaydeep Sikri, Farrokh Abrishamkar, Nico De Laurentiis
  • Publication number: 20150263869
    Abstract: This disclosure provides systems, methods and apparatus for finite rate of innovation channel estimation. In one aspect an apparatus for equalizing received signals is provided. The apparatus comprises a signal per-processing unit configured to process received pilot signals transmitted through a sparse channel into at least one composite signal. The at least one composite signal further includes a plurality of signal peaks. The apparatus further comprises a Fourier transform unit configured to transform the at least one composite signal into frequency-domain data and a channel estimation unit configured to estimate at least one delay value and at least one peak value from the frequency-domain data.
    Type: Application
    Filed: March 12, 2014
    Publication date: September 17, 2015
    Applicant: QUALCOMM Incorporated
    Inventors: Roy Franklin Quick, JR., Farrokh Abrishamkar, Ori Shental, Marvin Leroy Vis, Ali Hormati, Roland Rick
  • Publication number: 20150139367
    Abstract: Apparatus and methods for channel estimation include determining two streams corresponding to odd and even samples of a received signal that is sampled at a first chip rate, performing least squares successive interference cancellation on each of the two streams to obtain odd and even raw channel estimates, interlacing the odd and even raw channel estimates to obtain interlaced channel estimates, interpolating additional samples in the interlaced channel estimates to create higher chip rate channel estimates, identifying a first set of tap positions based on the higher chip rate channel estimates, applying matching pursuit to the first set of tap positions to identify a second set of tap positions, wherein the second set of tap positions includes fewer tap positions than the first set of tap positions, and determining a third set of tap positions by clustering each tap position included in the second set of tap positions.
    Type: Application
    Filed: November 18, 2013
    Publication date: May 21, 2015
    Applicant: QUALCOMM Incorporated
    Inventors: Farrokh ABRISHAMKAR, Venkata Gautham Chavali, Insung Kang, Carlos Ruben Cabrera-Mercader, Hari Sankar, Aamod Dinkar Khandekar
  • Publication number: 20150139368
    Abstract: Apparatus and methods for channel estimation in time division synchronous code division multiple access (TD-SCDMA) based on a signal received from one or more Node Bs include determining least squares channel metric estimates based on the received signal, identifying signal taps and noise taps in a tapped delay line channel estimate based on at least one of temporal correlations of the least squares channel metric estimates or composite hypothesis testing on the least squares channel metric estimates, and updating an interference buffer based on the signal taps and the noise taps.
    Type: Application
    Filed: November 18, 2013
    Publication date: May 21, 2015
    Applicant: QUALCOMM Incorporated
    Inventors: Farrokh ABRISHAMKAR, Venkata Gautham Chavali, Insung Kang, Bahadir Canpolat