Patents Assigned to KBC Research Foundation
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Patent number: 9325614Abstract: Methods and systems for detecting a preamble of a data packet in wireless communication systems is provided. To determine a preamble from a received signal, which may include a noise-altered preamble bit sequence, linear feedback shift registers (LFSRs) can be used to generate a count of the received preamble, and the count is compared to pre-generated scores to identify a match. Example methods include for each of a number of different preamble orientations of a preamble, generating a count value based on a comparison of bits of the preamble with a random bit sequence to produce a sequence of count values, and comparing the sequence of count values with m sequences of count values. A sequence of count values is identified that includes a maximum number of matching elements, and the received preamble is determined to be one of the m preambles corresponding to the identified sequence.Type: GrantFiled: March 5, 2014Date of Patent: April 26, 2016Assignees: KBC RESEARCH FOUNDATION PVT. LTD., ANNA UNIVERSITYInventors: Sarad Ammanat Venugopalan, Srikanth Subramanian
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Publication number: 20140185631Abstract: Methods and systems for detecting a preamble of a data packet in wireless communication systems is provided. To determine a preamble from a received signal, which may include a noise-altered preamble bit sequence, linear feedback shift registers (LFSRs) can be used to generate a count of the received preamble, and the count is compared to pre-generated scores to identify a match. Example methods include for each of a number of different preamble orientations of a preamble, generating a count value based on a comparison of bits of the preamble with a random bit sequence to produce a sequence of count values, and comparing the sequence of count values with m sequences of count values. A sequence of count values is identified that includes a maximum number of matching elements, and the received preamble is determined to be one of the m preambles corresponding to the identified sequence.Type: ApplicationFiled: March 5, 2014Publication date: July 3, 2014Applicants: ANNA UNIVERSITY, KBC RESEARCH FOUNDATION PVT. LTD.Inventors: Sarad Ammanat VENUGOPALAN, Srikanth SUBRAMANIAN
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Patent number: 8705418Abstract: Methods and systems for detecting a preamble of a data packet in wireless communication systems is provided. To determine a preamble from a received signal, which may include a noise-altered preamble bit sequence, linear feedback shift registers (LFSRs) can be used to generate a count of the received preamble, and the count is compared to pre-generated scores to identify a match. Example methods include for each of a number of different preamble orientations of a preamble, generating a count value based on a comparison of bits of the preamble with a random bit sequence to produce a sequence of count values, and comparing the sequence of count values with m sequences of count values. A sequence of count values is identified that includes a maximum number of matching elements, and the received preamble is determined to be one of the m preambles corresponding to the identified sequence.Type: GrantFiled: March 3, 2010Date of Patent: April 22, 2014Assignees: KBC Research Foundation Pvt. Ltd., Anna UniversityInventors: Sarad Ammanat Venugopalan, Srikanth Subramanian
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Patent number: 8665697Abstract: Sub-channels in cells of an Orthogonal Frequency Division Multiple Access (OFDMA) network are formed based on random permutations of a set of subcarrier indices. The random permutations are performed for each cell of the network using a pseudo-random number generator (PRNG) and a shuffle technique. Different initial states of the PRNG are used to generate the random permutation of the subcarrier indices for each cell. In an embodiment, sub-carriers represented by a contiguous group of indices in the random permutation obtained for a cell are assigned to form a sub-channel. Interference diversity for the OFDMA network is thereby improved.Type: GrantFiled: December 23, 2009Date of Patent: March 4, 2014Assignees: KBC Research Foundation Pvt. Ltd., Anna UniversityInventors: Sarad Ammanath Venugopalan, Srikanth Subramanian
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Patent number: 8527852Abstract: Data communication, with improved error detection, of a signal having a plurality of data blocks, by: error checking a received data block in a first sequence using a first polynomial, beginning with a first predetermined initial error checking state, producing a first checksum; error checking the received data block in a second sequence using a second polynomial, using the first checksum as a second predetermined initial error checking state, producing a second checksum; comparing the second checksum to the first predetermined initial error checking state to detect errors in the data communication; and repeating the above steps for sequential data blocks of the data communication, wherein the first polynomial is an inverse of the second polynomial.Type: GrantFiled: October 15, 2012Date of Patent: September 3, 2013Assignees: Anna University, KBC Research Foundation PVT. Ltd.Inventor: Sethuraman Muthu
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Publication number: 20130042162Abstract: Data communication, with improved error detection, of a signal having a plurality of data blocks, by: error checking a received data block in a first sequence using a first polynomial, beginning with a first predetermined initial error checking state, producing a first CSUM; error checking the received data block in a second sequence using a second polynomial, using the first CSUM as a second predetermined initial error checking state, producing a second CSUM; comparing the second CSUM to the first predetermined initial error checking state to detect errors in the data communication; and repeating the above steps for sequential data blocks of the data communication, wherein the first polynomial is an inverse of the second polynomial.Type: ApplicationFiled: October 15, 2012Publication date: February 14, 2013Applicants: KBC RESEARCH FOUNDATION PVT. LTD., ANNA UNIVERSITYInventors: ANNA UNIVERSITY, KBC RESEARCH FOUNDATION PVT. LTD.
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Patent number: 8307266Abstract: Data communication, with improved error detection, of a signal having a plurality of data blocks, by: error checking a received data block in a first sequence using a first polynomial, beginning with a first predetermined initial error checking state, producing a first CSUM; error checking the received data block in a second sequence using a second polynomial, using the first CSUM as a second predetermined initial error checking state, producing a second CSUM; comparing the second CSUM to the first predetermined initial error checking state to detect errors in the data communication; and repeating the above steps for sequential data blocks of the data communication, wherein the first polynomial is an inverse of the second polynomial.Type: GrantFiled: June 18, 2009Date of Patent: November 6, 2012Assignees: Anna University, KBC Research Foundation PVT. Ltd.Inventor: Muthu Sethuraman
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Patent number: 8252746Abstract: The present invention relates to the use of sFRP-4 and functional variants thereof as anti-angiogenic agents. It relates to methods of treatment and screening methods using sFRP-4 and functional variants thereof. Further, it relates to compositions, and in particular pharmaceutical composition, including sFRP-4 and functional variants thereof which may be used in the various methods provided herein.Type: GrantFiled: October 10, 2008Date of Patent: August 28, 2012Assignees: The University of Western Australia, KBC Research Foundations Private Limited, Anna UniversityInventors: Arunasalam Dharmarajan, Survo Chatterjee
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Patent number: 7920599Abstract: Methods and systems for synchronizing wireless transmission of data packets is provided. Signals having a data packet frame format including a preamble (with a pattern of symbol sequences) and data are received, and patterns of symbol sequences are correlated. A first metric can be calculated that is a ratio of an average of the correlation values and an average of a power of the signals. A second metric can be calculated that defines an average of a power of noise in the signals. The methods include determining an approximate division of the preamble and data in the data packet of each signal based on the first and second metrics. The methods further include determining a cross-correlation between versions of a transmitted signal to produce a number of peaks equal to a number of transmit antennas, generating a third metric based on combinations of cross-correlations, and identifying a position of a maximum peak within the third metric as a fine timing offset amount.Type: GrantFiled: March 18, 2010Date of Patent: April 5, 2011Assignees: Anna University, KBC Research FoundationInventors: Srikanth Subramanian, Sathish Viswanathan
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Publication number: 20090170771Abstract: The present invention relates to the use of sFRP-4 and functional variants thereof as anti-angiogenic agents. It relates to methods of treatment and screening methods using sFRP-4 and functional variants thereof. Further, it relates to compositions, and in particular pharmaceutical composition, including sFRP-4 and functional variants thereof which may be used in the various methods provided herein.Type: ApplicationFiled: October 10, 2008Publication date: July 2, 2009Applicants: The University of Western Australia, KBC Research Foundation Private Limited, Anna UniversityInventors: Arunasalam Dharmarajan, Survo Chatterjee