Patents by Inventor Sahan S. Gamage
Sahan S. Gamage 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: 11665040Abstract: Mixed mode constellation mapping to map a data block to a block of sub-carriers based on a configurable set of one or more constellation mapping schemes, and corresponding mixed mode least likelihood ratio (LLR) de-mapping based on the configurable set of one or more modulation schemes. The set may be configurable to include multiple modulation schemes to provide to a SEvSNR measure that is a non-weighted or weighted average of SEvSNR measures of the multiple modulation schemes. Mixed mode constellation mapping may be useful be configurable to control spectral efficiency versus SNR (SEvSNR) over a range of SNR with relatively fine SNR granularity, and may be configurable to control SEvSNR over a range of SNR at a fixed FEC code rate, which may include a highest available or highest permitted code rate.Type: GrantFiled: July 23, 2021Date of Patent: May 30, 2023Assignee: Intel CorporationInventors: Bernard Arambepola, Noam Tal, Sahan S. Gamage, Thushara Hewavithana, Shaul Shulman
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Publication number: 20220021475Abstract: Mixed mode constellation mapping to map a data block to a block of sub-carriers based on a configurable set of one or more constellation mapping schemes, and corresponding mixed mode least likelihood ratio (LLR) de-mapping based on the configurable set of one or more modulation schemes. The set may be configurable to include multiple modulation schemes to provide to a SEvSNR measure that is a non-weighted or weighted average of SEvSNR measures of the multiple modulation schemes. Mixed mode constellation mapping may be useful be configurable to control spectral efficiency versus SNR (SEvSNR) over a range of SNR with relatively fine SNR granularity, and may be configurable to control SEvSNR over a range of SNR at a fixed FEC code rate, which may include a highest available or highest permitted code rate.Type: ApplicationFiled: July 23, 2021Publication date: January 20, 2022Applicant: Intel CorporationInventors: Bernard Arambepola, Noam Tal, Sahan S. Gamage, Thushara Hewavithana, Shaul Shulman
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Patent number: 11075713Abstract: Mixed mode constellation mapping to map a data block to a block of sub-carriers based on a configurable set of one or more constellation mapping schemes, and corresponding mixed mode least likelihood ratio (LLR) de-mapping based on the configurable set of one or more modulation schemes. The set may be configurable to include multiple modulation schemes to provide to a SEvSNR measure that is a non-weighted or weighted average of SEvSNR measures of the multiple modulation schemes. Mixed mode constellation mapping may be useful be configurable to control spectral efficiency versus SNR (SEvSNR) over a range of SNR with relatively fine SNR granularity, and may be configurable to control SEvSNR over a range of SNR at a fixed FEC code rate, which may include a highest available or highest permitted code rate.Type: GrantFiled: December 13, 2019Date of Patent: July 27, 2021Assignee: Intel CorporationInventors: Bernard Arambepola, Noam Tal, Sahan S. Gamage, Thushara Hewavithana, Shaul Shulman
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Patent number: 10848267Abstract: Mixed mode constellation mapping to map a data block to a block of sub-carriers based on a configurable set of one or more constellation mapping schemes, and corresponding mixed mode least likelihood ratio (LLR) de-mapping based on the configurable set of one or more modulation schemes. The set may be configurable to include multiple modulation schemes to provide to a SEvSNR measure that is a non-weighted or weighted average of SEvSNR measures of the multiple modulation schemes. Mixed mode constellation mapping may be useful be configurable to control spectral efficiency versus SNR (SEvSNR) over a range of SNR with relatively fine SNR granularity, and may be configurable to control SEvSNR over a range of SNR at a fixed FEC code rate, which may include a highest available or highest permitted code rate.Type: GrantFiled: October 31, 2018Date of Patent: November 24, 2020Assignee: Intel CorporationInventors: Bernard Arambepola, Noam Tal, Sahan S. Gamage, Thushara Hewavithana, Shaul Shulman
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Publication number: 20200119834Abstract: Mixed mode constellation mapping to map a data block to a block of sub-carriers based on a configurable set of one or more constellation mapping schemes, and corresponding mixed mode least likelihood ratio (LLR) de-mapping based on the configurable set of one or more modulation schemes. The set may be configurable to include multiple modulation schemes to provide to a SEvSNR measure that is a non-weighted or weighted average of SEvSNR measures of the multiple modulation schemes. Mixed mode constellation mapping may be useful be configurable to control spectral efficiency versus SNR (SEvSNR) over a range of SNR with relatively fine SNR granularity, and may be configurable to control SEvSNR over a range of SNR at a fixed FEC code rate, which may include a highest available or highest permitted code rate.Type: ApplicationFiled: December 13, 2019Publication date: April 16, 2020Applicant: Intel CorporationInventors: Bernard Arambepola, Noam Tal, Sahan S. Gamage, Thushara Hewavithana, Shaul Shulman
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Patent number: 10341046Abstract: Mixed mode constellation mapping to map a data block to a block of sub-carriers based on a configurable set of one or more constellation mapping schemes, and corresponding mixed mode least likelihood ratio (LLR) de-mapping based on the configurable set of one or more modulation schemes. The set may be configurable to include multiple modulation schemes to provide to a SEvSNR measure that is a non-weighted or weighted average of SEvSNR measures of the multiple modulation schemes. Mixed mode constellation mapping may be useful be configurable to control spectral efficiency versus SNR (SEvSNR) over a range of SNR with relatively fine SNR granularity, and may be configurable to control SEvSNR over a range of SNR at a fixed FEC code rate, which may include a highest available or highest permitted code rate.Type: GrantFiled: April 5, 2017Date of Patent: July 2, 2019Assignee: Intel CorporationInventors: Bernard Arambepola, Noam Tal, Sahan S. Gamage, Thushara Hewavithana, Shaul Shulman
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Publication number: 20190173609Abstract: Mixed mode constellation mapping to map a data block to a block of sub-carriers based on a configurable set of one or more constellation mapping schemes, and corresponding mixed mode least likelihood ratio (LLR) de-mapping based on the configurable set of one or more modulation schemes. The set may be configurable to include multiple modulation schemes to provide to a SEvSNR measure that is a non-weighted or weighted average of SEvSNR measures of the multiple modulation schemes. Mixed mode constellation mapping may be useful be configurable to control spectral efficiency versus SNR (SEvSNR) over a range of SNR with relatively fine SNR granularity, and may be configurable to control SEvSNR over a range of SNR at a fixed FEC code rate, which may include a highest available or highest permitted code rate.Type: ApplicationFiled: October 31, 2018Publication date: June 6, 2019Applicant: Intel CorporationInventors: Bernard Arambepola, Noam Tal, Sahan S. Gamage, Thushara Hewavithana, Shaul Shulman
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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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Patent number: 10158451Abstract: Mixed mode constellation mapping to map a data block to a block of sub-carriers based on a configurable set of one or more constellation mapping schemes, and corresponding mixed mode least likelihood ratio (LLR) de-mapping based on the configurable set of one or more modulation schemes. The set may be configurable to include multiple modulation schemes to provide to a SEvSNR measure that is a non-weighted or weighted average of SEvSNR measures of the multiple modulation schemes. Mixed mode constellation mapping may be useful be configurable to control spectral efficiency versus SNR (SEvSNR) over a range of SNR with relatively fine SNR granularity, and may be configurable to control SEvSNR over a range of SNR at a fixed FEC code rate, which may include a highest available or highest permitted code rate.Type: GrantFiled: October 23, 2017Date of Patent: December 18, 2018Assignee: Intel CorporationInventors: Bernard Arambepola, Noam Tal, Sahan S. Gamage, Thushara Hewavithana, Shaul Shulman
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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: 9954712Abstract: Methods and architectures for blind detection of physical layer control (PLC) signaling for transmitters and receivers having respective misaligned inverse fast Fourier transforms (IFFTs) and (FFTs) includes opening a frequency tracking offset calibration circuit, estimating or calculating a phase discontinuity due to FFT misalignment, closing the frequency tracking offset calibration circuit and applying a frequency correction that includes a frequency offset less the calculated or estimated phase discontinuity.Type: GrantFiled: June 30, 2017Date of Patent: April 24, 2018Assignee: Intel CorporationInventors: Bernard Arambepola, Thushara Hewavithana, Sahan S. Gamage, Shaul Shulman
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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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Publication number: 20180048417Abstract: Mixed mode constellation mapping to map a data block to a block of sub-carriers based on a configurable set of one or more constellation mapping schemes, and corresponding mixed mode least likelihood ratio (LLR) de-mapping based on the configurable set of one or more modulation schemes. The set may be configurable to include multiple modulation schemes to provide to a SEvSNR measure that is a non-weighted or weighted average of SEvSNR measures of the multiple modulation schemes. Mixed mode constellation mapping may be useful be configurable to control spectral efficiency versus SNR (SEvSNR) over a range of SNR with relatively fine SNR granularity, and may be configurable to control SEvSNR over a range of SNR at a fixed FEC code rate, which may include a highest available or highest permitted code rate.Type: ApplicationFiled: October 23, 2017Publication date: February 15, 2018Applicant: Intel CorporationInventors: Bernard Arambepola, Noam Tal, Sahan S. Gamage, Thushara Hewavithana, Shaul Shulman
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Publication number: 20170272201Abstract: Mixed mode constellation mapping to map a data block to a block of sub-carriers based on a configurable set of one or more constellation mapping schemes, and corresponding mixed mode least likelihood ratio (LLR) de-mapping based on the configurable set of one or more modulation schemes. The set may be configurable to include multiple modulation schemes to provide to a SEvSNR measure that is a non-weighted or weighted average of SEvSNR measures of the multiple modulation schemes. Mixed mode constellation mapping may be useful be configurable to control spectral efficiency versus SNR (SEvSNR) over a range of SNR with relatively fine SNR granularity, and may be configurable to control SEvSNR over a range of SNR at a fixed FEC code rate, which may include a highest available or highest permitted code rate.Type: ApplicationFiled: April 5, 2017Publication date: September 21, 2017Applicant: Intel CorporationInventors: Bernard Arambepola, Noam Tal, Sahan S. Gamage, Thushara Hewavithana, Shaul Shulman
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Patent number: 9634795Abstract: Mixed mode constellation mapping to map a data block to a block of sub-carriers based on a configurable set of one or more constellation mapping schemes, and corresponding mixed mode least likelihood ratio (LLR) de-mapping based on the configurable set of one or more modulation schemes. The set may be configurable to include multiple modulation schemes to provide to a SEvSNR measure that is a non-weighted or weighted average of SEvSNR measures of the multiple modulation schemes. Mixed mode constellation mapping may be useful be configurable to control spectral efficiency versus SNR (SEvSNR) over a range of SNR with relatively fine SNR granularity, and may be configurable to control SEvSNR over a range of SNR at a fixed FEC code rate, which may include a highest available or highest permitted code rate.Type: GrantFiled: March 4, 2014Date of Patent: April 25, 2017Assignee: Intel CorporationInventors: Bernard Arambepola, Noam Tal, Sahan S. Gamage, Thushara Hewavithana, Shaul Shulman
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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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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: 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