Patents by Inventor Rajesh Raja Manakkal
Rajesh Raja Manakkal 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: 8867570Abstract: A method and apparatus of transmitting pilot tones and data in multi-carrier spatial multiplexing transmission is disclosed. The method includes a plurality of subscribers transmitting data to a base station through common frequency sub-carrier and symbol time tiles. Each of the multiple subscribers rotating frequency sub-carrier and symbol time locations of pilot tones within the frequency sub-carrier and symbol time tiles.Type: GrantFiled: June 28, 2007Date of Patent: October 21, 2014Assignee: Broadcom CorporationInventors: Sriram Mudulodu, Rajesh Raja Manakkal, Sam P. Alex, Louay Jalloul
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Patent number: 8830814Abstract: A method, system and apparatus for communication in an Orthogonal Frequency Division Multiplexing (OFDM) communication system is provided. The method includes allocating a plurality of sequences to a plurality of sectors in the OFDMA communication system. The plurality of sequences are orthogonal to each other. The method further includes communicating one or more OFDM tiles between one or more MSs in one or more sectors of the plurality of sectors and one or more BSs of the one or more sectors. The one or more OFDM tiles include one or more sequences of the plurality of sequences allocated to the one or more sectors.Type: GrantFiled: April 16, 2012Date of Patent: September 9, 2014Assignee: Broadcom CorporationInventors: Rajesh Raja Manakkal, Leena Zacharias, Louay Jalloul
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Publication number: 20120207239Abstract: A method, system and apparatus for communication in an Orthogonal Frequency Division Multiplexing (OFDM) communication system is provided. The method includes allocating a plurality of sequences to a plurality of sectors in the OFDMA communication system. The plurality of sequences are orthogonal to each other. The method further includes communicating one or more OFDM tiles between one or more MSs in one or more sectors of the plurality of sectors and one or more BSs of the one or more sectors. The one or more OFDM tiles include one or more sequences of the plurality of sequences allocated to the one or more sectors.Type: ApplicationFiled: April 16, 2012Publication date: August 16, 2012Applicant: Broadcom CorporationInventors: Rajesh Raja MANAKKAL, Leena Zacharias, Louay Jalloul
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Patent number: 8159931Abstract: A method, system and apparatus for communication in an Orthogonal Frequency Division Multiplexing (OFDM) communication system is provided. The method includes allocating a plurality of sequences to a plurality of sectors in the OFDMA communication system. The plurality of sequences are orthogonal to each other. The method further includes communicating one or more OFDM tiles between one or more MSs in one or more sectors of the plurality of sectors and one or more BSs of the one or more sectors. The one or more OFDM tiles include one or more sequences of the plurality of sequences allocated to the one or more sectors.Type: GrantFiled: December 11, 2008Date of Patent: April 17, 2012Assignee: Broadcom CorporationInventors: Rajesh Raja Manakkal, Leena Zacharias, Louay Jalloul
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Patent number: 8139667Abstract: A method and apparatus for estimating frequency offset and timing offset of a first Mobile Station (MS) in a communication system is provided. The method includes receiving a composite signal at a plurality of receiver antennas of a Base Transceiver Station (BTS). The composite signal includes a first signal transmitted from a first MS and a second signal transmitted from a second MS. The composite signal includes one or more tiles. Each tile includes a plurality of data sub-carriers, a plurality of first pilot sub-carriers, and a plurality of second pilot sub-carriers. A total phase offset of the first MS is estimated based on a complex conjugate product of pilot symbols of the plurality of first pilot sub-carriers. Thereafter, a first phase offset corresponding to the timing offset of the first MS is estimated based on a Power Delay Profile (PDP) of one or more first pilot sub-carriers.Type: GrantFiled: November 22, 2010Date of Patent: March 20, 2012Assignee: Broadcom CorporationInventors: Rajesh Raja Manakkal, Louay Jalloul, Sam P. Alex, Anupama Lakshmanan, Djordje Tujkovic, Sriram Mudulodu
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Patent number: 7916774Abstract: A method of estimating a channel between a desired Mobile Station (MS) and a Base Transceiver Station (BTS) antenna of a one of a plurality of sectors of a BTS. The method includes receiving a composite signal at the BTS antenna. The composite signal comprises a desired MS signal and an interfering MS signal. Thereafter, a known desired random sequence and a known interfering random sequence is applied to pilot symbols of the composite signal, resulting in a first de-randomized signal and a second de-randomized signal. Finally, the channel estimate is obtained by weighting and summing the first de-randomized signal and second de-randomized signal.Type: GrantFiled: September 12, 2007Date of Patent: March 29, 2011Assignee: Broadcom CorporationInventors: Rajesh Raja Manakkal, Sam P. Alex, Louay Jalloul
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Publication number: 20110069793Abstract: A method and apparatus for estimating frequency offset and timing offset of a first Mobile Station (MS) in a communication system is provided. The method includes receiving a composite signal at a plurality of receiver antennas of a Base Transceiver Station (BTS). The composite signal includes a first signal transmitted from a first MS and a second signal transmitted from a second MS. The composite signal includes one or more tiles. Each tile includes a plurality of data sub-carriers, a plurality of first pilot sub-carriers, and a plurality of second pilot sub-carriers. A total phase offset of the first MS is estimated based on a complex conjugate product of pilot symbols of the plurality of first pilot sub-carriers. Thereafter, a first phase offset corresponding to the timing offset of the first MS is estimated based on a Power Delay Profile (PDP) of one or more first pilot sub-carriers.Type: ApplicationFiled: November 22, 2010Publication date: March 24, 2011Applicant: BECEEM COMMUNICATIONS INC.Inventors: Rajesh Raja Manakkal, Louay Jalloul, Sam P. Alex
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Patent number: 7852909Abstract: A method and apparatus for estimating frequency offset and timing offset of a first Mobile Station (MS) in a communication system is provided. The method includes receiving a composite signal at a plurality of receiver antennas of a Base Transceiver Station (BTS). The composite signal includes a first signal transmitted from a first MS and a second signal transmitted from a second MS. The composite signal includes one or more tiles. Each tile includes a plurality of data sub-carriers, a plurality of first pilot sub-carriers, and a plurality of second pilot sub-carriers. A total phase offset of the first MS is estimated based on a complex conjugate product of pilot symbols of the plurality of first pilot sub-carriers. Thereafter, a first phase offset corresponding to the timing offset of the first MS is estimated based on a Power Delay Profile (PDP) of one or more first pilot sub-carriers.Type: GrantFiled: December 21, 2007Date of Patent: December 14, 2010Assignee: BECEEM Communications Inc.Inventors: Rajesh Raja Manakkal, Louay Jalloul, Sam P. Alex, Anupama Lakshmanan, Djordje Tujkovic, Sriram Mudulodu
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Patent number: 7680027Abstract: Methods and systems for estimating channel of one or more MSs in a collaborative MIMO communication system are provided. The method includes receiving a signal transmitted from a transmit antenna of a first MS and a transmit antenna of a second MS at a BTS using one or more receiver antennas. The method further includes computing one or more conjugate products for each of the first MS and the second MS using the signal. Thereafter, an average is determined over the plurality of receiver antennas and the plurality of tiles of the plurality of conjugate products for each of the first MS and the second MS. A phase determined based on the average of the plurality of conjugate products for the first MS and the second MS is divided into a first phase and a second phase for each of the first MS and the second MS. Additionally, the method includes determining a channel estimate for each tile of the first MS and the second MS at each receiver antennas.Type: GrantFiled: June 28, 2007Date of Patent: March 16, 2010Assignee: BECEEM Communications Inc.Inventors: Rajesh Raja Manakkal, Sam P. Alex, Louay Jalloul
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Publication number: 20090147668Abstract: A method, system and apparatus for communication in an Orthogonal Frequency Division Multiplexing (OFDM) communication system is provided. The method includes allocating a plurality of sequences to a plurality of sectors in the OFDMA communication system. The plurality of sequences are orthogonal to each other. The method further includes communicating one or more OFDM tiles between one or more MSs in one or more sectors of the plurality of sectors and one or more BSs of the one or more sectors. The one or more OFDM tiles include one or more sequences of the plurality of sequences allocated to the one or more sectors.Type: ApplicationFiled: December 11, 2008Publication date: June 11, 2009Inventors: Rajesh Raja Manakkal, Leena Zacharias, Louay Jalloul
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Publication number: 20090069022Abstract: A method of estimating a channel between a desired Mobile Station (MS) and a Base Transceiver Station (BTS) antenna of a one of a plurality of sectors of a BTS. The method includes receiving a composite signal at the BTS antenna. The composite signal comprises a desired MS signal and an interfering MS signal. Thereafter, a known desired random sequence and a known interfering random sequence is applied to pilot symbols of the composite signal, resulting in a first de-randomized signal and a second de-randomized signal. Finally, the channel estimate is obtained by weighting and summing the first de-randomized signal and second de-randomized signal.Type: ApplicationFiled: September 12, 2007Publication date: March 12, 2009Inventors: Rajesh Raja Manakkal, Sam P. Alex, Louay Jalloul
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Publication number: 20080273453Abstract: Methods and systems for estimating channel of one or more MSs in a collaborative MIMO communication system are provided. The method includes receiving a signal transmitted from a transmit antenna of a first MS and a transmit antenna of a second MS at a BTS using one or more receiver antennas. The method further includes computing one or more conjugate products for each of the first MS and the second MS using the signal. Thereafter, an average is determined over the plurality of receiver antennas and the plurality of tiles of the plurality of conjugate products for each of the first MS and the second MS. A phase determined based on the average of the plurality of conjugate products for the first MS and the second MS is divided into a first phase and a second phase for each of the first MS and the second MS. Additionally, the method includes determining a channel estimate for each tile of the first MS and the second MS at each receiver antennas.Type: ApplicationFiled: June 28, 2007Publication date: November 6, 2008Inventors: Rajesh Raja Manakkal, Sam P. Alex, Louay Jalloul
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Publication number: 20080273510Abstract: A method and apparatus of transmitting pilot tones and data in multi-carrier spatial multiplexing transmission is disclosed. The method includes a plurality of subscribers transmitting data to a base station through common frequency sub-carrier and symbol time tiles. Each of the multiple subscribers rotating frequency sub-carrier and symbol time locations of pilot tones within the frequency sub-carrier and symbol time tiles.Type: ApplicationFiled: June 28, 2007Publication date: November 6, 2008Inventors: Sriram Mudulodu, Rajesh Raja Manakkal, Sam P. Alex, Louay Jalloul
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Publication number: 20080273621Abstract: A method and apparatus for estimating frequency offset and timing offset of a first Mobile Station (MS) in a communication system is provided. The method includes receiving a composite signal at a plurality of receiver antennas of a Base Transceiver Station (BTS). The composite signal includes a first signal transmitted from a first MS and a second signal transmitted from a second MS. The composite signal includes one or more tiles. Each tile includes a plurality of data sub-carriers, a plurality of first pilot sub-carriers, and a plurality of second pilot sub-carriers. A total phase offset of the first MS is estimated based on a complex conjugate product of pilot symbols of the plurality of first pilot sub-carriers. Thereafter, a first phase offset corresponding to the timing offset of the first MS is estimated based on a Power Delay Profile (PDP) of one or more first pilot sub-carriers.Type: ApplicationFiled: December 21, 2007Publication date: November 6, 2008Inventors: Rajesh Raja Manakkal, Louay Jalloul, Sam P. Alex, Anupama Lakshmanan, Diordje Tujkovic, Sriram Mudulodu