Patents by Inventor Sundaram Vanka
Sundaram Vanka 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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Publication number: 20230413310Abstract: In some aspects, the disclosure is directed to methods and systems for signaling and decoding of punctured sub-bands in a trigger-based PPDU. In one aspect, at least one of the communication interface or the processing circuitry of a wireless communication device is configured to generate a trigger frame that includes signaling indicating that at least one other wireless communication device is allowed to reduce a bandwidth of an allocated resource unit (RU) for transmitting data via a communication channel; transmit, via the communication channel, the trigger frame to at least one other wireless communication device; receive, via the communication channel and from the at least one other wireless communication device, an uplink (UL) orthogonal frequency division multiple access (OFDMA) frame including the data; and process the UL OFDMA frame including the data based on the signaling.Type: ApplicationFiled: September 6, 2023Publication date: December 21, 2023Applicant: Avago Technologies International Sales Pte. LimitedInventors: Ron Porat, Karim Nassiri Toussi, Srinath Puducheri Sundaravaradhan, Sundaram Vanka
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Patent number: 11792834Abstract: In some aspects, the disclosure is directed to methods and systems for signaling and decoding of punctured sub-bands in a trigger-based PPDU. In one aspect, at least one of the communication interface or the processing circuitry of a wireless communication device is configured to generate a trigger frame that includes signaling indicating that at least one other wireless communication device is allowed to reduce a bandwidth of an allocated resource unit (RU) for transmitting data via a communication channel; transmit, via the communication channel, the trigger frame to at least one other wireless communication device; receive, via the communication channel and from the at least one other wireless communication device, an uplink (UL) orthogonal frequency division multiple access (OFDMA) frame including the data; and process the UL OFDMA frame including the data based on the signaling.Type: GrantFiled: February 8, 2021Date of Patent: October 17, 2023Assignee: Avago Technologies International Sales Pte. LimitedInventors: Ron Porat, Karim Nassiri Toussi, Srinath Puducheri Sundaravaradhan, Sundaram Vanka
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Patent number: 11197164Abstract: In some aspects, the disclosure is directed to methods and systems for utilizing protocols to enable two 802.11 devices to exchange their dynamically-changing local channel availability table and form a mutual channel availability table with time, frequency, and transmission rate domains available. This table may be used to make optimum opportunistic use of link resources by adapting packet duration, frequency utilization and transmission rate to channel conditions.Type: GrantFiled: October 3, 2019Date of Patent: December 7, 2021Assignee: Avago Technologies International Sales Pte. LimitedInventors: Sundaram Vanka, Matthew J. Fischer, Rohit Gaikwad, Vinko Erceg, Ron Porat
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Publication number: 20210274507Abstract: In some aspects, the disclosure is directed to methods and systems for signaling and decoding of punctured sub-bands in a trigger-based PPDU. In one aspect, at least one of the communication interface or the processing circuitry of a wireless communication device is configured to generate a trigger frame that includes signaling indicating that at least one other wireless communication device is allowed to reduce a bandwidth of an allocated resource unit (RU) for transmitting data via a communication channel; transmit, via the communication channel, the trigger frame to at least one other wireless communication device; receive, via the communication channel and from the at least one other wireless communication device, an uplink (UL) orthogonal frequency division multiple access (OFDMA) frame including the data; and process the UL OFDMA frame including the data based on the signaling.Type: ApplicationFiled: February 8, 2021Publication date: September 2, 2021Inventors: Ron Porat, Karim Nassiri Toussi, Srinath Puducheri Sundaravaradhan, Sundaram Vanka
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Patent number: 11076298Abstract: In some aspects, the disclosure is directed to methods and systems for utilizing protocols to enable two 802.11 devices to exchange their dynamically-changing local channel availability table and form a mutual channel availability table with time, frequency, and transmission rate domains available. This table may be used to make optimum opportunistic use of link resources by adapting packet duration, frequency utilization and transmission rate to channel conditions.Type: GrantFiled: October 3, 2019Date of Patent: July 27, 2021Assignee: Avago Technologies International Sales Pte. LimitedInventors: Sundaram Vanka, Matthew J. Fischer, Rohit Gaikwad, Vinko Erceg, Ron Porat
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Publication number: 20200037170Abstract: In some aspects, the disclosure is directed to methods and systems for utilizing protocols to enable two 802.11 devices to exchange their dynamically-changing local channel availability table and form a mutual channel availability table with time, frequency, and transmission rate domains available. This table may be used to make optimum opportunistic use of link resources by adapting packet duration, frequency utilization and transmission rate to channel conditions.Type: ApplicationFiled: October 3, 2019Publication date: January 30, 2020Inventors: Sundaram Vanka, Matthew J. Fischer, Rohit Gaikwad, Vinko Erceg, Ron Porat
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Publication number: 20200037171Abstract: In some aspects, the disclosure is directed to methods and systems for utilizing protocols to enable two 802.11 devices to exchange their dynamically-changing local channel availability table and form a mutual channel availability table with time, frequency, and transmission rate domains available. This table may be used to make optimum opportunistic use of link resources by adapting packet duration, frequency utilization and transmission rate to channel conditions.Type: ApplicationFiled: October 3, 2019Publication date: January 30, 2020Inventors: Sundaram Vanka, Matthew J. Fischer, Rohit Gaikwad, Vinko Erceg, Ron Porat
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Patent number: 10506446Abstract: In some aspects, the disclosure is directed to methods and systems for utilizing protocols to enable two 802.11 devices to exchange their dynamically-changing local channel availability table and form a mutual channel availability table with time, frequency, and transmission rate domains available. This table may be used to make optimum opportunistic use of link resources by adapting packet duration, frequency utilization and transmission rate to channel conditions.Type: GrantFiled: April 12, 2018Date of Patent: December 10, 2019Assignee: Avago Technologies International Sales Pte. LimitedInventors: Sundaram Vanka, Matthew J. Fischer, Rohit Gaikwad, Vinko Erceg, Ron Porat
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Publication number: 20190327746Abstract: In some aspects, the disclosure is directed to methods and systems for wireless communication. The method includes: determining one or more first subsets of channels within a frequency band, each of the first subsets of channels comprising one or more of a plurality of channels within the frequency band and corresponding to a potential set of one or more channels on which resource units of the frequency band can be allocated for transmissions; determining one or more second subsets of channels from among the first subsets of channels by enforcing an occupancy requirement on the one or more first subsets of channels; and selecting one or more of the second subsets of channels on which to allocate resource units for transmissions.Type: ApplicationFiled: April 24, 2019Publication date: October 24, 2019Inventors: Ron Porat, Sundaram Vanka, Karim Nassiri Toussi
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Patent number: 8259786Abstract: A channel smoothing filter with a finite impulse response (FIR) has a controller which reads parallel sample data out of an FFT memory in such a manner as to generate an even function, the sample data applied to a preamble equalizer accompanied by a preamble sign and zero, the preamble outputs coupled to three filter processors, each filter processor having four filter engines whose outputs are summed, the channel smoothing filter generating an a register output, the register input coupled to a summer which has as inputs: the first filter processor shifted by four, the second filter processor shifted by two, the third filter processor, and the register output. Coefficients for an edge filter and a central filter are provided in Zero Sign Shift (ZSS) format, and by selection of coefficients using a canonical signed digit (CSD) algorithm, no multipliers are required for the channel smoothing FIR filter.Type: GrantFiled: February 10, 2009Date of Patent: September 4, 2012Assignee: Redpine Signals, Inc.Inventors: Partha Sarathy Murali, Kashiviswanath Nethi, Karthik Vaidyanathan, Sundaram Vanka
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Patent number: 8107518Abstract: A process for equalizing streams of OFDM subcarrier data computes the noise variance for each stream, and forms a stream weighting coefficient by equalizing the noise variance, such that for a first stream having a noise variance ?1 and a second stream having a noise variance of ?2, the first stream is scaled by k 1 = 2 ? ? 2 ? 1 2 + ? 2 2 and the second stream is scaled by k 2 = 2 ? ? 1 ? 1 2 + ? 2 2 .Type: GrantFiled: August 4, 2008Date of Patent: January 31, 2012Assignee: Redpine Signals, Inc,Inventors: Logeshwaran Vijayan, Sundaram Vanka, Partha Sarathy Murali, Phanimithra Gangalakurthi
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Patent number: 8031762Abstract: A process for equalizing streams of OFDM subcarrier data computes the noise variance for each stream, and forms a stream weighting coefficient by equalizing the noise variance, such that for a first stream having a noise variance ?1 and a second stream having a noise variance of ?2, the first stream is scaled by k 1 = 2 ? ? 2 ? 1 2 + ? 2 2 and the second stream is scaled by k 2 = 2 ? ? 1 ? 1 2 - ? 2 2 .Type: GrantFiled: August 4, 2008Date of Patent: October 4, 2011Assignee: Redpine Signals, Inc.Inventors: Logeshwaran Vijayan, Sundaram Vanka, Partha Sarathy Murali, Phanimithra Gangalakurthi
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Patent number: 7965782Abstract: A reduced complexity maximum likelihood decoder receives a stream of symbols Y and channel estimate H. A transformation converts Y and H into Z and R by computing matrix R, such that the product of R and Q produces matrix H. A second transformation column-swaps matrix H to form H?, thereafter generating Q? and R? subject to the same constraints as was described for Q and R. Transformed variables Z and Z? are formed by multiplying Y by QH and Q?H, respectively. Table entries with Z and R and Z? and R? have entries of all possible x2 accompanied by estimates of x1 derived from x2 and Z, and similar entries of all possible x1 accompanied by estimates of x2 derived from x1 and Z?. Hard and soft decisions are made by finding the minimum distance metric of the combined entries of the first and second table.Type: GrantFiled: May 11, 2007Date of Patent: June 21, 2011Assignee: Redpine Signals, Inc.Inventors: Logeshwaran Vijayan, Partha Sarathy Murali, Sundaram Vanka
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Patent number: 7870468Abstract: A Reed Solomon decoder utilizes re-configurable and re-usable components in a granular configuration which provides an upper array and a lower array of repeated Reconfigurable Elementary Units (REU) which in conjunction with a FIFO can be loaded with syndromes and correction terms to decode Reed Solomon codewords. The upper array of REUs and lower array of REUs handle the Reed Solomon decoding steps in a pipelined manner using systolic REU structures. The repeated REU includes the two registers, two Galois Field adders, a Galois Field multiplier, and multiplexers to interconnect the elements. The REU is then able to perform each of the steps required for Reed-Solomon decoder through reconfiguration for each step using the multiplexers to reconfigure the functions. In this manner, a reconfigurable computational element may be used for each step of the Reed-Solomon decoding process.Type: GrantFiled: May 26, 2006Date of Patent: January 11, 2011Assignee: Redpine Signals, Inc.Inventors: Sundaram Vanka, Phanimithra Gangalakurthi
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Publication number: 20100202504Abstract: A channel smoothing filter with a finite impulse response (FIR) has a controller which reads parallel sample data out of an FFT memory in such a manner as to generate an even function, the sample data applied to a preamble equalizer accompanied by a preamble sign and zero, the preamble outputs coupled to three filter processors, each filter processor having four filter engines whose outputs are summed, the channel smoothing filter generating an a register output, the register input coupled to a summer which has as inputs: the first filter processor shifted by four, the second filter processor shifted by two, the third filter processor, and the register output. Coefficients for an edge filter and a central filter are provided in Zero Sign Shift (ZSS) format, and by selection of coefficients using a canonical signed digit (CSD) algorithm, no multipliers are required for the channel smoothing FIR filter.Type: ApplicationFiled: February 10, 2009Publication date: August 12, 2010Inventors: Partha Sarathy Murali, Kashiviswanath Nethi, Karthik Vaidyanathan, Sundaram Vanka
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Publication number: 20100027702Abstract: A process for equalizing streams of OFDM subcarrier data computes the noise variance for each stream, and forms a stream weighting coefficient by equalizing the noise variance, such that for a first stream having a noise variance ?1 and a second stream having a noise variance of ?2, the first stream is scaled by k 1 = 2 ? ? 2 ? 1 2 + ? 2 2 and the second stream is scaled by k 2 = 2 ? ? 1 ? 1 2 - ? 2 2 .Type: ApplicationFiled: August 4, 2008Publication date: February 4, 2010Inventors: Logeshwaran Vijayan, Sundaram Vanka, Partha Sarathy Murali, Phanimithra Gangalakurthi
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Publication number: 20100027693Abstract: A process for equalizing streams of OFDM subcarrier data computes the noise variance for each stream, and forms a stream weighting coefficient by equalizing the noise variance, such that for a first stream having a noise variance ?1 and a second stream having a noise variance of ?2, the first stream is scaled by k 1 = 2 ? ? 2 ? 1 2 + ? 2 2 and the second stream is scaled by k 2 = 2 ? ? 1 ? 1 2 + ? 2 2 .Type: ApplicationFiled: August 4, 2008Publication date: February 4, 2010Inventors: Logeshwaran VIJAYAN, Sundaram VANKA, Partha Sarathy MURALI, Phanimithra GANGALAKURTHI
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Patent number: 7634000Abstract: A SINR estimator receiving a symbol stream has a delay element coupled to the symbol stream to produce a delayed symbol stream, which is also coupled to a conjugator. A first multiplier forms a product from the symbol stream and the output of the conjugator, thereafter summing these values over an interval L and scaling by L to form a correlated power estimate Cn. A second multiplier forms a product from the symbol stream which is multiplied by the conjugate of the input, thereafter summing these values over the preamble interval 2L and scaling by 2L to form a non-correlated power estimate Pn. Cn and Pn are compared to generate an SINR estimate.Type: GrantFiled: May 22, 2006Date of Patent: December 15, 2009Assignee: Redpine Signals, Inc.Inventors: Vaidyanathan Karthik, Partha Sarathy Murali, Sundaram Vanka
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Patent number: 7295144Abstract: A quantizer has a plurality of decision blocks, each coupled from input to output, where each decision blocks output generates a binary value that is an unchanged decision block input if the decision block input is below the threshold input level divided by a power of 2, or the decision block subtracts a threshold divided by the power of 2 and passes this result as the decision block output. The quantizer output is formed from the bits of each comparison from each decision block. The threshold is developed from a channel noise variance which may be multiplied by a scale factor related to coding type and rate. In this manner, a large number of input bits to be quantized may be converted to a smaller number of quantizer output bits, while preserving the dynamic range information required to correctly decode signals passed through a communications channel having multi-path frequency selective fading.Type: GrantFiled: May 22, 2006Date of Patent: November 13, 2007Assignee: Redpine Signals, Inc.Inventors: Vaidyanathan Karthik, Partha Sarathy Murali, Sundaram Vanka