Patents by Inventor Parveen K. Shukla
Parveen K. Shukla 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).
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Patent number: 10305714Abstract: The disclosure generally relates to a method and apparatus for frequency interleaving. Specifically, an embodiment of the disclosure relates to a communication system having one or more antennas, a radio, a memory circuit, and a processor circuit. The antennas can be used to communicate signals or to comply with different transmission protocols. The radio can be configured to send and receive radio signals. The memory can communicate with the processor circuit and contain instructions for the processor circuit to write data carriers along a plurality of rows and columns of a 2-D store in bit-reversed order and read the columns of 2-D store.Type: GrantFiled: January 29, 2018Date of Patent: May 28, 2019Assignee: Intel CorporationInventors: Bernard Arambepola, Parveen K. Shukla, Thushara Hewavithana, Sahan S. Gamage
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Publication number: 20180287842Abstract: The disclosure generally relates to a method and apparatus for frequency interleaving. Specifically, an embodiment of the disclosure relates to a communication system having one or more antennas, a radio, a memory circuit, and a processor circuit. The antennas can be used to communicate signals or to comply with different transmission protocols. The radio can be configured to send and receive radio signals. The memory can communicate with the processor circuit and contain instructions for the processor circuit to write data carriers along a plurality of rows and columns of a 2-D store in bit-reversed order and read the columns of 2-D store.Type: ApplicationFiled: January 29, 2018Publication date: October 4, 2018Applicant: Intel CorporationInventors: Bernard Arambepola, Parveen K. Shukla, Thushara Hewavithana, Sahan S. Gamage
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Patent number: 9954708Abstract: The disclosure generally relates to a method and apparatus for frequency interleaving. Specifically, an embodiment of the disclosure relates to a communication system having one or more antennas, a radio, a memory circuit, and a processor circuit. The antennas can be used to communicate signals or to comply with different transmission protocols. The radio can be configured to send and receive radio signals. The memory can communicate with the processor circuit and contain instructions for the processor circuit to write data carriers along a plurality of rows and columns of a 2-D store in bit-reversed order and read the columns of 2-D store.Type: GrantFiled: November 15, 2013Date of Patent: April 24, 2018Assignee: Intel CorporationInventors: Bernard Arambepola, Parveen K. Shukla, Thushara Hewavithana, Sahan S. Gamage
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Patent number: 9742610Abstract: One embodiment provides an apparatus. The apparatus includes an optimization module configured to determine a guard interval remainder based, at least in part on a comparison of an allowable microreflection interference level and an actual microreflection interference level; and a windowing module configured to window an OFDM (orthogonal frequency division multiplexed) symbol utilizing the guard interval remainder. The apparatus may further include a channel estimator module configured to determine a predicted channel frequency response based, at least in part, on a probing symbol; and a pre-equalizer module configured to pre-equalize the OFDM symbol based, at least in part, on the predicted channel frequency response.Type: GrantFiled: March 14, 2016Date of Patent: August 22, 2017Assignee: INTEL CORPORATIONInventors: Bernard Arambepola, Parveen K. Shukla, Thushara Hewavithana
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Patent number: 9515687Abstract: Apparatus and methods are described to perform inter carrier interference (ICI) reduction or cancellation in an orthogonal frequency domain multiplexing (OFDM) receiver. A first and a second stage of ICI cancellation may be performed before inputting an estimated transmitted data carrier for forward error correction. Forward error correction may include a signal re-correction and reconstruction of the estimated transmitted data carrier prior to a further stage of ICI cancellation.Type: GrantFiled: November 18, 2011Date of Patent: December 6, 2016Assignee: Intel CorporationInventors: Thushara Hewavithana, Parveen K. Shukla, Bernard Arambepola
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Publication number: 20160285664Abstract: One embodiment provides an apparatus. The apparatus includes an optimization module configured to determine a guard interval remainder based, at least in part on a comparison of an allowable microreflection interference level and an actual microreflection interference level; and a windowing module configured to window an OFDM (orthogonal frequency division multiplexed) symbol utilizing the guard interval remainder. The apparatus may further include a channel estimator module configured to determine a predicted channel frequency response based, at least in part, on a probing symbol; and a pre-equalizer module configured to pre-equalize the OFDM symbol based, at least in part, on the predicted channel frequency response.Type: ApplicationFiled: March 14, 2016Publication date: September 29, 2016Applicant: Intel CorporationInventors: BERNARD ARAMBEPOLA, PARVEEN K. SHUKLA, THUSHARA HEWAVITHANA
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Patent number: 9288094Abstract: One embodiment provides an apparatus. The apparatus includes an optimization module configured to determine a guard interval remainder based, at least in part on a comparison of an allowable microreflection interference level and an actual microreflection interference level; and a windowing module configured to window an OFDM (orthogonal frequency division multiplexed) symbol utilizing the guard interval remainder. The apparatus may further include a channel estimator module configured to determine a predicted channel frequency response based, at least in part, on a probing symbol; and a pre-equalizer module configured to pre-equalize the OFDM symbol based, at least in part, on the predicted channel frequency response.Type: GrantFiled: December 18, 2013Date of Patent: March 15, 2016Assignee: Intel CorporationInventors: Bernard Arambepola, Parveen K. Shukla, Thushara Hewavithana
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Patent number: 9130787Abstract: According to various embodiments, devices and methods disclosed herein include performing, using a processor, a linear operation on a first plurality of channel frequency responses and a plurality of corresponding predictor coefficients to estimate a new channel frequency response. Each of the plurality of corresponding predictor coefficients may be updated based on an error value and a second plurality of channel frequency responses to obtain an updated predictor coefficient. The error value may be computed based on an estimated current channel frequency response and a predicted current channel frequency response. The new channel frequency response may be used to equalize a received modulated signal including a single-carrier modulated signal, e.g., a signal modulated using a vestigial sideband modulation scheme, or a quadrature amplitude modulation scheme.Type: GrantFiled: July 18, 2011Date of Patent: September 8, 2015Assignee: INTEL CORPORATIONInventors: Thushara Hewavithana, Bernard Arambepola, Sahan S. Gamage, Parveen K. Shukla
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Publication number: 20150172088Abstract: One embodiment provides an apparatus. The apparatus includes an optimization module configured to determine a guard interval remainder based, at least in part on a comparison of an allowable microreflection interference level and an actual microreflection interference level; and a windowing module configured to window an OFDM (orthogonal frequency division multiplexed) symbol utilizing the guard interval remainder. The apparatus may further include a channel estimator module configured to determine a predicted channel frequency response based, at least in part, on a probing symbol; and a pre-equalizer module configured to pre-equalize the OFDM symbol based, at least in part, on the predicted channel frequency response.Type: ApplicationFiled: December 18, 2013Publication date: June 18, 2015Inventors: Bernard Arambepola, Parveen K. Shukla, Thushara Hewavithana
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Patent number: 9054933Abstract: A system according to one embodiment includes a demodulator configured to receive an orthogonal frequency division multiplexed (OFDM) modulated signal comprising a current symbol and a sequence of previous symbols, each of the symbols comprising one or more pilot sub-carriers and one or more data sub-carriers; a phase angle computation circuit coupled to the demodulator, the phase angle computation circuit configured to compute a first mean, the first mean computed from the phase angle of one or more of the pilot sub-carriers of a predetermined number of the previous symbols; a predictive filter circuit coupled to the phase angle computation circuit, the predictive filter circuit configured to compute a second mean, the second mean estimating the phase angle of one or more sub-carriers of the current symbol, the estimation based on the first mean; and a phase noise cancelling circuit coupled to the predictive filter circuit, the phase noise cancelling circuit configured to correct the phase of one or more subType: GrantFiled: December 20, 2011Date of Patent: June 9, 2015Assignee: Intel CorporationInventors: Bernard Arambepola, Thushara Hewavithana, Parveen K. Shukla, Sahan S. Gamage
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Publication number: 20150139351Abstract: The disclosure generally relates to a method and apparatus for frequency interleaving. Specifically, an embodiment of the disclosure relates to a communication system having one or more antennas, a radio, a memory circuit, and a processor circuit. The antennas can be used to communicate signals or to comply with different transmission protocols. The radio can be configured to send and receive radio signals. The memory can communicate with the processor circuit and contain instructions for the processor circuit to write data carriers along a plurality of rows and columns of a 2-D store in bit-reversed order and read the columns of 2-D store.Type: ApplicationFiled: November 15, 2013Publication date: May 21, 2015Inventors: Bernard Arambepola, Parveen K. Shukla, Thushara Hewavithana, Sahan S. Gamage
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Patent number: 8908810Abstract: A system and method are provided for implementing a soft Reed-Solomon (RS) decoding scheme, technique or algorithm to improve physical layer performance in cable modems and cable gateways. The algorithm is implemented in a forward error correction (FEC) module connected to a QAM demodulator. The RS decoding scheme is implemented without significantly complicating hardware or processing overhead. The soft Reed-Solomon (RS) decoding scheme extracts candidate RS symbols and their Log Likelihood Ratios (LLRs) from QAM symbols. The set of highest probable candidate blocks are then chosen and these are decoded using a variant of the Chase algorithm until a valid codeword is detected at the decoder output.Type: GrantFiled: December 27, 2012Date of Patent: December 9, 2014Assignee: Intel CorporationInventors: Bernard Arambepola, Murat Badem, Parveen K. Shukla, Sahan Gamage, Thushara Hewavithana, Naor Goldman
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Patent number: 8879676Abstract: According to various embodiments, apparatus and methods disclosed herein may be implemented in a digital communication (wired or wireless) receiver, and relate to minimizing noise in an estimated channel frequency response at the receiver for the purposes of channel equalization. The disclosed apparatus and methods may include determining a channel impulse response based on an estimated channel frequency response. The estimated channel frequency response, the channel impulse response, or both may include noise. An impulse response mask may be determined based on the channel impulse response, and further applied to the channel impulse response to obtain a noise-reduced channel impulse response, which may be Fourier transformed to obtain a noise-reduced channel frequency response.Type: GrantFiled: November 1, 2011Date of Patent: November 4, 2014Assignee: Intel CorporationInventors: Thushara Hewavithana, Bernard Arambepola, Parveen K. Shukla, Sahan S. Gamage
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Patent number: 8842750Abstract: According to various embodiments, a method is disclosed that includes receiving an orthogonal frequency-division multiplexing (OFDM) modulated signal at a modulator; filtering the received modulated signal using a plurality of sets of filter coefficients with a linear predictor algorithm; and estimating a channel frequency response based on the filtering.Type: GrantFiled: December 21, 2010Date of Patent: September 23, 2014Assignee: Intel CorporationInventors: Parveen K. Shukla, Bernard Arambepola, Thushara Hewavithana, Sahan S. Gamage
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Patent number: 8817195Abstract: An embodiment of the present invention provides a method for digital television demodulation, comprising using adjacent-channel power dependent automatic gain control (AGC) for the digital television demodulation, wherein an AGC technique takes into account a total power as well as power of adjacent channels to control gain of a gain control amplifier.Type: GrantFiled: October 7, 2013Date of Patent: August 26, 2014Assignee: Intel CorporationInventors: Parveen K. Shukla, Bernard Arambepola, Thushara Hewavithana, Sahan Gamage
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Publication number: 20140211889Abstract: A system according to one embodiment includes a demodulator configured to receive an orthogonal frequency division multiplexed (OFDM) modulated signal comprising a current symbol and a sequence of previous symbols, each of the symbols comprising one or more pilot sub-carriers and one or more data sub-carriers; a phase angle computation circuit coupled to the demodulator, the phase angle computation circuit configured to compute a first mean, the first mean computed from the phase angle of one or more of the pilot sub-carriers of a predetermined number of the previous symbols; a predictive filter circuit coupled to the phase angle computation circuit, the predictive filter circuit configured to compute a second mean, the second mean estimating the phase angle of one or more sub-carriers of the current symbol, the estimation based on the first mean; and a phase noise cancelling circuit coupled to the predictive filter circuit, the phase noise cancelling circuit configured to correct the phase of one or more subType: ApplicationFiled: December 20, 2011Publication date: July 31, 2014Inventors: Bernard Arambepola, Thushara Hewavithana, Parveen K. Shukla, Sahan S. Gamage
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Publication number: 20140185657Abstract: A system and method are provided for implementing a soft Reed-Solomon (RS) decoding scheme, technique or algorithm to improve physical layer performance in cable modems and cable gateways. At 1024-QAM, a receiver is provided in which a signal to noise ratio is reduced by at least about 1 dB relaxing design considerations and specifications for other components in the system including for the tuner. A soft-RS-symbol generation scheme is provided to enable soft-input RC decoding in a forward error correction (FEC) module connected to a QAM demodulator. The RS decoding scheme is implemented without significantly complicating hardware or processing overhead. A typical receiver hardware requirement in an FEC module to implement the disclosed scheme may be comparatively modest, e.g., on an order of approximately 50K gates.Type: ApplicationFiled: December 27, 2012Publication date: July 3, 2014Inventors: Bernard Arambepola, Murat Badem, Parveen K. Shukla, Sahan Gamage, Thushara Hewavithana, Naor Goldman
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Publication number: 20140036157Abstract: An embodiment of the present invention provides a method for digital television demodulation, comprising using adjacent-channel power dependent automatic gain control (AGC) for the digital television demodulation, wherein an AGC technique takes into account a total power as well as power of adjacent channels to control gain of a gain control amplifier.Type: ApplicationFiled: October 7, 2013Publication date: February 6, 2014Inventors: Parveen K. Shukla, Bernard Arambepola, Thushara Hewavithana, Sahan Gamage
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Patent number: 8611407Abstract: According to various embodiments, apparatus and methods disclosed herein include computing phase error of a received signal based on an estimate of a first component (e.g., in-phase component) of a transmitted signal and an analytic representation of the estimate of the first component of the transmitted signal. The analytic representation of the estimate of the first component of the transmitted signal may represent an estimate of a second component (e.g., quadrature phase component) of the transmitted signal. The analytic representation of the estimated first component may be computed using at least one of a Hilbert transform or Fourier transform on the estimated first component of the transmitted signal.Type: GrantFiled: November 1, 2011Date of Patent: December 17, 2013Assignee: Intel CorporationInventors: Bernard Arambepola, Thushara Hewavithana, Sahan S. Gamage, Parveen K. Shukla
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Patent number: 8582035Abstract: An embodiment of the present invention provides a method for digital television demodulation, comprising using adjacent-channel power dependent automatic gain control (AGC) for the digital television demodulation, wherein an AGC technique takes into account a total power as well as power of adjacent channels to control gain of a gain control amplifier.Type: GrantFiled: February 22, 2011Date of Patent: November 12, 2013Assignee: Intel CorporationInventors: Parveen K Shukla, Bernard Arambepola, Thushara Hewavithana, Sahan S Gamage