Patents by Inventor Vijay Sundararajan
Vijay Sundararajan 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: 20230287841Abstract: A controller for controlling regeneration in an aftertreatment system comprising a first leg and a second leg is configured to: determine whether regeneration is permitted by the engine based on engine operating parameters; in response to regeneration being permitted, determine whether regeneration is required in at least one of the first leg or the second leg based on operating parameters of the first leg and the second leg, and whether regeneration is inhibited in either the first leg or the second leg; and in response to determining that (i) regeneration is required in at least one of the first or second leg, and (ii) regeneration is not inhibited in either the first or the second leg, cause insertion of hydrocarbons into the engine to thereby increase the temperature of the exhaust gas to a target temperature and cause regeneration in each of the first and second leg.Type: ApplicationFiled: March 10, 2022Publication date: September 14, 2023Applicant: Cummins Emission Solutions Inc.Inventors: Vikram Sundararajan, Jinqian Gong, Daniel D. Wilhelm, Vijay Ramchandra Kadam, Kerang Wang, Todd A. Corbet
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Patent number: 10651953Abstract: A wireless communication device includes an antenna to receive a signal, a low noise amplifier, and circuitry that determines the power level of the signal. The circuitry also determines whether the signal includes a packet, and causes the low noise amplifier to amplify the signal when the signal includes a packet and the power level of the signal is below a threshold. The circuitry also causes the low noise amplifier to be bypassed when the signal does not include a packet, or the power level of the signal is above the predetermined threshold and the signal includes a packet.Type: GrantFiled: October 31, 2018Date of Patent: May 12, 2020Assignee: AVAGO TECHNOLOGIES INTERNATIONAL SALES PTE. LIMITEDInventors: Marcellus Forbes, Vijay Sundararajan, Arya Behzad, Bijoy Bhukania, Rishabh Agarwal
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Publication number: 20190132063Abstract: A wireless communication device includes an antenna to receive a signal, a low noise amplifier, and circuitry that determines the power level of the signal. The circuitry also determines whether the signal includes a packet, and causes the low noise amplifier to amplify the signal when the signal includes a packet and the power level of the signal is below a threshold. The circuitry also causes the low noise amplifier to be bypassed when the signal does not include a packet, or the power level of the signal is above the predetermined threshold and the signal includes a packet.Type: ApplicationFiled: October 31, 2018Publication date: May 2, 2019Applicant: Avago Technologies International Sales Pte. LimitedInventors: Marcellus Forbes, Vijay Sundararajan, Arya Behzad, Bijoy Bhukania, Rishabh Agarwal
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Patent number: 10237004Abstract: A device includes circuitry configured to determine characteristics of jammer signals associated with a first wireless protocol of another device. An amount of interference between the jammer signals and a first received signal at the device associated with a second wireless protocol is determined, and the jammer signals are filtered from the second received signal when the amount of interference between the jammer signals and the first received signal is greater than a first predetermined threshold.Type: GrantFiled: June 24, 2016Date of Patent: March 19, 2019Assignee: AVAGO TECHNOLOGIES INTERNATIONAL SALES PTE. LIMITEDInventors: Vijay Sundararajan, Sriram Sundararajan, Payam Rabiei, Hrishikesh Atre, Yury Gonikberg, Neeraj Poojary, Suryakant Maharana, Avinash Renuka, Mohammad Karim, Jihui Chen
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Publication number: 20170346578Abstract: A device includes circuitry configured to determine characteristics of jammer signals associated with a first wireless protocol of another device. An amount of interference between the jammer signals and a first received signal at the device associated with a second wireless protocol is determined, and the jammer signals are filtered from the second received signal when the amount of interference between the jammer signals and the first received signal is greater than a first predetermined threshold.Type: ApplicationFiled: June 24, 2016Publication date: November 30, 2017Applicant: BROADCOM CORPORATIONInventors: Vijay SUNDARARAJAN, Sriram SUNDARARAJAN, Payam RABIEI, Hrishikesh ATRE, Yury GONIKBERG, Neeraj POOJARY, Suryakant MAHARANA, Avinash RENUKA, Mohammad KARIM, Jihui CHEN
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Patent number: 8514927Abstract: A block of N-bit symbols is compressed to reduce transfer bandwidth between two devices. A plurality of locations within the block of N-bit symbols is identified in which a same known N-bit symbol is to be located. The known symbol in each of the plurality of locations is replaced with a substitute 1-bit symbol having a first value. Each remaining symbol in the block of N-bit symbols is marked with a marker bit having a second value. The compressed block of marked N-bit symbols and substitute symbols is transmitted from one device to another device and then decompressed by replacing the substitute symbols with known symbols and removing the markers to restore the original block.Type: GrantFiled: November 19, 2008Date of Patent: August 20, 2013Assignee: Texas Instruments IncorporatedInventors: Vijay Sundararajan, Zukang Shen
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Patent number: 7965797Abstract: A method, system and apparatus for generating a constant amplitude zero autocorrelation (CAZAC) sequence to be transmitted on a wireless communication channel between a user equipment and a base station within a cellular communication network includes iteratively calculating elements of the CAZAC sequence according to a CAZAC sequence formula until a number of iterations has reached a predetermined iteration value determined in accordance with a number of subcarriers associated with the channel; obtaining a value of particular elements of the CAZAC sequence from a table of stored values at predetermined reset iteration values in order to limit error propagation; and generating the reference signal based upon the elements of the CAZAC sequence. The CAZAC sequence formula is one of a Chu sequence, Frank-Zadoff sequence, Zadoff-Chu (ZC) sequence, and Generalized Chirp-Like (GCL) Sequence.Type: GrantFiled: February 29, 2008Date of Patent: June 21, 2011Assignee: Texas Instruments IncorporatedInventors: Andres Kwasinski, Ran Katzur, Vijay Sundararajan, Brian Francis Johnson
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Publication number: 20090129461Abstract: A block of N-bit symbols is compressed to reduce transfer bandwidth between two devices. A plurality of locations within the block of N-bit symbols is identified in which a same known N-bit symbol is to be located. The known symbol in each of the plurality of locations is replaced with a substitute 1-bit symbol having a first value. Each remaining symbol in the block of N-bit symbols is marked with a marker bit having a second value. The compressed block of marked N-bit symbols and substitute symbols is transmitted from one device to another device and then decompressed by replacing the substitute symbols with known symbols and removing the markers to restore the original block.Type: ApplicationFiled: November 19, 2008Publication date: May 21, 2009Inventors: Vijay SUNDARARAJAN, Zukang Shen
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Publication number: 20090116587Abstract: A method, system and apparatus for generating a constant amplitude zero autocorrelation (CAZAC) sequence to be transmitted on a wireless communication channel between a user equipment and a base station within a cellular communication network includes iteratively calculating elements of the CAZAC sequence according to a CAZAC sequence formula until a number of iterations has reached a predetermined iteration value determined in accordance with a number of subcarriers associated with the channel; obtaining a value of particular elements of the CAZAC sequence from a table of stored values at predetermined reset iteration values in order to limit error propagation; and generating the reference signal based upon the elements of the CAZAC sequence. The CAZAC sequence formula is one of a Chu sequence, Frank-Zadoff sequence, Zadoff-Chu (ZC) sequence, and Generalized Chirp-Like (GCL) Sequence.Type: ApplicationFiled: February 29, 2008Publication date: May 7, 2009Applicant: TEXAS INSTRUMENTS INCORPORATEDInventors: Andres Kwasinski, Ran Katzur, Vijay Sundararajan, Brian Francis Johnson
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Patent number: 7386326Abstract: A programmable co-processor system comprising a datapath, a microprogram, and a microcontroller is provided. The datapath includes one or more datapath elements operable to receive input signals. The microprogram memory includes a microprogram operable to control the datapath in order to process the input signals. The microcontroller is operable to modify the microprogram based on a modification command.Type: GrantFiled: September 4, 2002Date of Patent: June 10, 2008Assignee: Texas Instruments IncorporatedInventors: Vijay Sundararajan, Sriram Sundararajan, Alan Gatherer
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Publication number: 20080056117Abstract: A method for defining a valid set of sub-channels {1, 2, . . . , K} for transmission between a user device and a base station, where each sub-channel âkâ has sub-carrier spacing s[k]. Sub-carriers of each sub-channel are equi-spaced. That is, for each sub-channel âkâ, the distance between consecutive sub-carriers is maintained at a fixed level s[k]. Different sub-channels can have different sub-carrier spacing s[k]. Sub-channels are non-overlapping. A resource tree is used to select a valid set of sub-channels from a set of possible tone spacing's that include sequence {M1, M2, . . . , MN} of not necessarily different positive integers.Type: ApplicationFiled: August 31, 2007Publication date: March 6, 2008Inventors: Tarik Muharemovic, Vijay Sundararajan
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Patent number: 7317776Abstract: The invention solves the problem of efficiently generating pseudo noise sequences with an arbitrary offset delay. Novel and improved architectures are used, based on the matrix-vector pseudo noise generators. A first embodiment of this invention includes a plurality of serially connected transition matrix multiplication circuits producing a plurality of output state matrices. A second embodiment of this invention combines a first stage having plurality of matrix multiplication circuits connected to a first multiplexer circuit which selects an state matrix or one of the matrix products with a serial chain of matrix generator circuits including second matrix multiplication circuit and a second multiplexer selecting either a first input or the output of the second matrix multiplication circuit.Type: GrantFiled: April 16, 2003Date of Patent: January 8, 2008Assignee: Texas Instruments IncorporatedInventors: Sundararajan Sriram, Vijay Sundararajan
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Publication number: 20060252447Abstract: In this invention the base station utilizes a history of previous TPC commands to provide more deterministic channel behavior. This enables better generation of future TPC commands, SIR estimates and channel estimates. Prior solutions don't utilize previous TPC decisions. This invention provides enhances SIR estimation, channel estimation and power control.Type: ApplicationFiled: May 3, 2006Publication date: November 9, 2006Inventors: Tarik Muharemovic, Sriram Sundararajan, Vijay Sundararajan, Alan Gatherer
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Publication number: 20050132242Abstract: A data processing apparatus simultaneously sorts n input data words into a sorted list of m list entries. The apparatus includes a pre-sorting network sorting the n input data words and a sorting network storing up to m list entries and storing respective input data words into the m list entries. The pre-sorting network includes a set of comparators for each unique pair of input data words, and a set of n multiplexers outputting a selected one of the n input data words, and a decoder circuit controlling the multiplexers responsive to the comparisons. The sorting network includes m basic units storing current list entries ordered from greatest to least. Each cycle the basic units selecting for storage the current list entry, a current list entry of a basic units storing greater list entries or one of the input data words.Type: ApplicationFiled: November 4, 2004Publication date: June 16, 2005Inventors: Marwan Adas, Vijay Sundararajan
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Publication number: 20040015527Abstract: The invention solves the problem of efficiently generating pseudo noise sequences with an arbitrary offset delay. Novel and improved architectures are used, based on the matrix-vector pseudo noise generators.Type: ApplicationFiled: April 16, 2003Publication date: January 22, 2004Inventors: Sundararajan Sriram, Vijay Sundararajan
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Publication number: 20030148793Abstract: A programmable co-processor system comprising a datapath, a microprogram, and a microcontroller is provided. The datapath includes one or more datapath elements operable to receive input signals. The microprogram memory includes a microprogram operable to control the datapath in order to process the input signals. The microcontroller is operable to modify the microprogram based on a modification command.Type: ApplicationFiled: September 4, 2002Publication date: August 7, 2003Inventors: Vijay Sundararajan, Sriram Sundararajan, Alan Gatherer