Patents by Inventor Brian A. Cameron
Brian A. Cameron 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: 20140067615Abstract: Illustrative embodiments may generally be directed to, among other things, a platform for providing information to one or more consumers to facilitate the purchase of one or more vehicles. In one embodiment, the platform may provide information associated with one or more OEMs and their vehicle product lines. In another embodiment, the platform may facilitate selecting, building, modifying, comparing, and/or purchasing one or more vehicles. In yet another embodiment, the platform may determine inventory data corresponding to actual available inventory at one or more dealerships.Type: ApplicationFiled: October 26, 2012Publication date: March 6, 2014Applicant: AUTOTRADER.COM, INC.Inventors: Nicholas James Park, Melanie Allgood Hygema, Brett Michael Kelly, Brian Cameron Zavitz, Pamela Ann Russek, Jose Ignacio Puente
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Publication number: 20140067614Abstract: Illustrative embodiments may generally be directed to, among other things, a platform for providing information to one or more consumers to facilitate the purchase of one or more vehicles. In one embodiment, the platform may provide information associated with one or more OEMs and their vehicle product lines. In another embodiment, the platform may facilitate selecting, building, modifying, comparing, and/or purchasing one or more vehicles. In yet another embodiment, the platform may determine inventory data corresponding to actual available inventory at one or more dealerships.Type: ApplicationFiled: October 26, 2012Publication date: March 6, 2014Applicant: AUTOTRADER.COM, INC.Inventors: Melanie Allgood Hygema, Brett Michael Kelly, Brian Cameron Zavitz, Pamela Ann Russek, Jose Ignacio Puente, Nicholas James Park
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Patent number: 8631312Abstract: LDPC (Low Density Parity Check) codes with corresponding parity check matrices selectively constructed with CSI (Cyclic Shifted Identity) and null sub-matrices. An LDPC matrix corresponding to an LDPC code is employed within a communication device to encode and/or decode coded signals for use in any of a number of communication systems. The LDPC matrix is composed of a number of sub-matrices and may be partitioned into a left hand side matrix and a right hand side matrix. The right hand side matrix may include two sub-matrix diagonals therein that are composed entirely of CSI (Cyclic Shifted Identity) sub-matrices; one of these two sub-matrix diagonals is located on the center sub-matrix diagonal and the other is located just to the left thereof. All other sub-matrices of the right hand side matrix may be null sub-matrices (i.e., all elements therein are values of zero “0”).Type: GrantFiled: January 30, 2013Date of Patent: January 14, 2014Assignee: Broadcom CorporationInventors: Ba-Zhong Shen, Hau Thien Tran, Tak K. Lee, Kelly Brian Cameron
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Publication number: 20130332792Abstract: The present disclosure presents symbol mapping for any desired error correction code (ECC) and/or uncoded modulation. A cross-shaped constellation is employed to perform symbol mapping. The cross-shaped constellation is generated from a rectangle-shaped constellation. Considering the rectangle-shaped constellation and its left hand side, a first constellation point subset located along that left hand side are moved to be along a top of the cross-shaped constellation while a second constellation point subset located along that left hand side are moved to be along a bottom of the cross-shaped constellation. For example, considering an embodiment having four constellation point subsets along the left hand side of the rectangle-shaped constellation, two of those subsets are moved to be along the top of the cross-shaped constellation while two other subsets of the constellation points along the left hand side are moved to be along the bottom of the cross-shaped constellation.Type: ApplicationFiled: May 31, 2013Publication date: December 12, 2013Inventors: Tak K. Lee, Ba-Zhong Shen, Kelly Brian Cameron, Hau Thien Tran
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Publication number: 20130166987Abstract: LDPC (Low Density Parity Check) codes with corresponding parity check matrices selectively constructed with CSI (Cyclic Shifted Identity) and null sub-matrices. An LDPC matrix corresponding to an LDPC code is employed within a communication device to encode and/or decode coded signals for use in any of a number of communication systems. The LDPC matrix is composed of a number of sub-matrices and may be partitioned into a left hand side matrix and a right hand side matrix. The right hand side matrix may include two sub-matrix diagonals therein that are composed entirely of CSI (Cyclic Shifted Identity) sub-matrices; one of these two sub-matrix diagonals is located on the center sub-matrix diagonal and the other is located just to the left thereof. All other sub-matrices of the right hand side matrix may be null sub-matrices (i.e., all elements therein are values of zero “0”).Type: ApplicationFiled: January 30, 2013Publication date: June 27, 2013Applicant: BROADCOM CORPORATIONInventors: Ba-Zhong Shen, Hau Thien Tran, Tak K. Lee, Kelly Brian Cameron
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Patent number: 8473817Abstract: LDPC (Low Density Parity Check) code size adjustment by shortening and puncturing. A variety of LDPC coded signals may be generated from an initial LDPC code using selected shortening and puncturing. Using LDPC code size adjustment approach, a single communication device whose hardware design is capable of processing the original LDPC code is also capable to process the various other LDPC codes constructed from the original LDPC code after undergoing appropriate shortening and puncturing. This provides significant design simplification and reduction in complexity because the same hardware can be implemented to accommodate the various LDPC codes generated from the original LDPC code. Therefore, a multi-LDPC code capable communication device can be implemented that is capable to process several of the generated LDPC codes. This approach allows for great flexibility in the LDPC code design, in that, the original code rate can be maintained after performing the shortening and puncturing.Type: GrantFiled: December 7, 2009Date of Patent: June 25, 2013Assignee: Broadcom CorporationInventors: Ba-Zhong Shen, Tak K. Lee, Kelly Brian Cameron
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Patent number: 8473822Abstract: True bit level decoding of TTCM (Turbo Trellis Coded Modulation) of variable rates and signal constellations. A decoding approach is presented that allows for decoding on a bit level basis that allows for discrimination of the individual bits of a symbol. Whereas prior art approaches typically perform decoding on a symbol level basis, this decoding approach allows for an improved approach in which the hard decisions/best estimates may be made individually for each of the individual bits of an information symbol. In addition, the decoding approach allows for a reduction in the total number of calculations that need to be performed as well as the total number of values that need to be stored during the iterative decoding. The bit level decoding approach is also able to decode a signal whose code rate and/or signal constellation type (and mapping) may vary on a symbol by symbol basis.Type: GrantFiled: November 30, 2009Date of Patent: June 25, 2013Assignee: Broadcom CorporationInventors: Ba-Zhong Shen, Kelly Brian Cameron, Hau Thien Tran
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Patent number: 8437362Abstract: A method for asymmetrical MIMO wireless communication begins by determining a number of transmission antennas for the asymmetrical MIMO wireless communication. The method continues by determining a number of reception antennas for the asymmetrical MIMO wireless communication. The method continues by, when the number of transmission antennas exceeds the number of reception antennas, using spatial time block coding for the asymmetrical MIMO wireless communication. The method continues by, when the number of transmission antennas does not exceed the number of reception antennas, using spatial multiplexing for the asymmetrical MIMO wireless communication.Type: GrantFiled: July 26, 2012Date of Patent: May 7, 2013Assignee: Broadcom CorporationInventors: Christopher J. Hansen, Jason A. Trachewsky, Nambirajan Seshadri, Kelly Brian Cameron, Hau Thien Tran, Ba-Zhong Shen
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Patent number: 8408475Abstract: Flexible rate matching. No constraints or restrictions are placed on a sending communication device when effectuating rate matching. The receiving communication device is able to accommodate received transmissions of essentially any size (e.g., up to an entire turbo codeword that includes all systematic bits and all parity bits). The receiving communication device employs a relatively small-sized memory to ensure a lower cost, smaller sized communication device (e.g., handset or user equipment such as a personal wireless communication device). Moreover, incremental redundancy is achieved in which successive transmissions need not include repeated information therein (e.g., a second transmission need not include any repeated information from a first transmission). Only when reaching an end of a block of bits or codeword to be transmitted, and when wrap around at the end of such block of bits or codeword occurs, would any repeat of bits be incurred within a later transmission.Type: GrantFiled: July 23, 2012Date of Patent: April 2, 2013Assignee: Broadcom CorporationInventors: Ba-Zhong Shen, Sirikiat Lek Ariyavisitakul, Mark Kent, Tak K. Lee, Kelly Brian Cameron
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Patent number: 8411775Abstract: Demodulation and/or demapping of a signal (e.g., based on a constellation whose points have a corresponding mapping with associated labels) is performed such that each dimension is processed separately without accounting for influences from the other dimension. For example, the demapping process operates on each respective dimension separately and independently. In some instances, the processing operates iteratively, in that, information identified from processing one of the dimensions is employed in directing the processing in another of the dimensions. Such operation may be performed iteratively by updating/modified information associated with one or more of the dimensions as well. Moreover, decoding may operate in accordance with iterative demapping (e.g., error correction code (ECC) and/or forward error correction (FEC) code by which information bits are encoded) to make estimates of bits within a signal sequence, and those estimates may be used in a subsequent iteration of demapping.Type: GrantFiled: June 30, 2011Date of Patent: April 2, 2013Assignee: Broadcom CorporationInventor: Kelly Brian Cameron
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Patent number: 8407556Abstract: LDPC (Low Density Parity Check) coding and interleaving implemented in multiple-input-multiple-output (MIMO) communication systems. As described herein, a wide variety of irregular LDPC codes may be generated using GRS or RS codes. A variety of communication device types are also presented that may employ the error correcting coding (ECC) using a GRS-based irregular LDPC code, along with appropriately selected interleaving, to provide for communications using ECC. These communication devices may be implemented to in wireless communication systems including those that comply with the recommendation practices and standards being developed by the IEEE 802.11n Task Group (i.e., the Task Group that is working to develop a standard for 802.11 TGn (High Throughput)).Type: GrantFiled: March 28, 2009Date of Patent: March 26, 2013Assignee: Broadcom CorporationInventors: Ba-Zhong Shen, Christopher J. Hansen, Joseph Paul Lauer, Kelly Brian Cameron, Tak K. Lee, Hau Thien Tran
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Patent number: 8370731Abstract: LDPC (Low Density Parity Check) codes with corresponding parity check matrices selectively constructed with CSI (Cyclic Shifted Identity) and null sub-matrices. An LDPC matrix corresponding to an LDPC code is employed within a communication device to encode and/or decode coded signals for use in any of a number of communication systems. The LDPC matrix is composed of a number of sub-matrices and may be partitioned into a left hand side matrix and a right hand side matrix. The right hand side matrix may include two sub-matrix diagonals therein that are composed entirely of CSI (Cyclic Shifted Identity) sub-matrices; one of these two sub-matrix diagonals is located on the center sub-matrix diagonal and the other is located just to the left thereof. All other sub-matrices of the right hand side matrix may be null sub-matrices (i.e., all elements therein are values of zero “0”).Type: GrantFiled: March 19, 2012Date of Patent: February 5, 2013Assignee: Broadcom CorporationInventors: Ba-Zhong Shen, Hau Thien Tran, Tak K. Lee, Kelly Brian Cameron
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Patent number: 8327221Abstract: Overlapping sub-matrix based LDPC (Low Density Parity Check) decoder. Novel decoding approach is presented, by which, updated bit edge messages corresponding to a sub-matrix of an LDPC matrix are immediately employed for updating of the check edge messages corresponding to that sub-matrix without requiring storing the bit edge messages; also updated check edge messages corresponding to a sub-matrix of the LDPC matrix are immediately employed for updating of the bit edge messages corresponding to that sub-matrix without requiring storing the check edge messages. Using this approach, twice as many decoding iterations can be performed in a given time period when compared to a system that performs updating of all check edge messages for the entire LDPC matrix, then updating of all bit edge messages for the entire LDPC matrix, and so on. When performing this overlapping approach in conjunction with min-sum processing, significant memory savings can also be achieved.Type: GrantFiled: July 16, 2012Date of Patent: December 4, 2012Assignee: Broadcom CorporationInventors: Hau Thien Tran, Kelly Brian Cameron, Ba-Zhong Shen, Tak K. Lee
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Publication number: 20120288024Abstract: A method for asymmetrical MIMO wireless communication begins by determining a number of transmission antennas for the asymmetrical MIMO wireless communication. The method continues by determining a number of reception antennas for the asymmetrical MIMO wireless communication. The method continues by, when the number of transmission antennas exceeds the number of reception antennas, using spatial time block coding for the asymmetrical MIMO wireless communication. The method continues by, when the number of transmission antennas does not exceed the number of reception antennas, using spatial multiplexing for the asymmetrical MIMO wireless communication.Type: ApplicationFiled: July 26, 2012Publication date: November 15, 2012Applicant: BROADCOM CORPORATIONInventors: Christopher J. Hansen, Jason A. Trachewsky, Nambirajan Seshadri, Kelly Brian Cameron, Hau Thien Tran, Ba-Zhong Shen
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Publication number: 20120287973Abstract: Flexible rate matching. No constraints or restrictions are placed on a sending communication device when effectuating rate matching. The receiving communication device is able to accommodate received transmissions of essentially any size (e.g., up to an entire turbo codeword that includes all systematic bits and all parity bits). The receiving communication device employs a relatively small-sized memory to ensure a lower cost, smaller sized communication device (e.g., handset or user equipment such as a personal wireless communication device). Moreover, incremental redundancy is achieved in which successive transmissions need not include repeated information therein (e.g., a second transmission need not include any repeated information from a first transmission). Only when reaching an end of a block of bits or codeword to be transmitted, and when wrap around at the end of such block of bits or codeword occurs, would any repeat of bits be incurred within a later transmission.Type: ApplicationFiled: July 23, 2012Publication date: November 15, 2012Applicant: BROADCOM CORPORATIONInventors: Ba-Zhong Shen, Sirikiat Lek Ariyavisitakul, Mark Kent, Tak K. Lee, Kelly Brian Cameron
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Publication number: 20120284583Abstract: Overlapping sub-matrix based LDPC (Low Density Parity Check) decoder. Novel decoding approach is presented, by which, updated bit edge messages corresponding to a sub-matrix of an LDPC matrix are immediately employed for updating of the check edge messages corresponding to that sub-matrix without requiring storing the bit edge messages; also updated check edge messages corresponding to a sub-matrix of the LDPC matrix are immediately employed for updating of the bit edge messages corresponding to that sub-matrix without requiring storing the check edge messages. Using this approach, twice as many decoding iterations can be performed in a given time period when compared to a system that performs updating of all check edge messages for the entire LDPC matrix, then updating of all bit edge messages for the entire LDPC matrix, and so on. When performing this overlapping approach in conjunction with min-sum processing, significant memory savings can also be achieved.Type: ApplicationFiled: July 16, 2012Publication date: November 8, 2012Applicant: BROADCOM CORPORATIONInventors: Hau Thien Tran, Kelly Brian Cameron, Ba-Zhong Shen, Tak K. Lee
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Publication number: 20120275547Abstract: Demodulation and/or demapping of a signal (e.g., based on a constellation whose points have a corresponding mapping with associated labels) is performed such that each dimension is processed separately without accounting for influences from the other dimension. For example, the demapping process operates on each respective dimension separately and independently. In some instances, the processing operates iteratively, in that, information identified from processing one of the dimensions is employed in directing the processing in another of the dimensions. Such operation may be performed iteratively by updating/modified information associated with one or more of the dimensions as well. Moreover, decoding may operate in accordance with iterative demapping (e.g., error correction code (ECC) and/or forward error correction (FEC) code by which information bits are encoded) to make estimates of bits within a signal sequence, and those estimates may be used in a subsequent iteration of demapping.Type: ApplicationFiled: June 30, 2011Publication date: November 1, 2012Applicant: BROADCOM CORPORATIONInventor: Kelly Brian Cameron
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Patent number: 8301991Abstract: LDPC (Low Density Parity Check) coded modulation symbol decoding. Symbol decoding is supported by appropriately modifying an LDPC tripartite graph to eliminate the bit nodes thereby generating an LDPC bipartite graph (such that symbol nodes are appropriately mapped directly to check nodes thereby obviating the bit nodes). The edges that communicatively couple the symbol nodes to the check nodes are labeled appropriately to support symbol decoding of the LDPC coded modulation signal. The iterative decoding processing may involve updating the check nodes as well as estimating the symbol sequence and updating the symbol nodes. In some embodiments, an alternative hybrid decoding approach may be performed such that a combination of bit level and symbol level decoding is performed. This LDPC symbol decoding out-performs bit decoding only. In addition, it provides comparable or better performance of bit decoding involving iterative updating of the associated metrics.Type: GrantFiled: November 30, 2010Date of Patent: October 30, 2012Assignee: Broadcom CorporationInventors: Ba-Zhong Shen, Hau Thien Tran, Kelly Brian Cameron
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Publication number: 20120272118Abstract: Variable modulation within combined LDPC (Low Density Parity Check) coding and modulation coding systems. Variable modulation encoding of LDPC coded symbols is presented. In addition, LDPC encoding, that generates an LDPC variable code rate signal, may also be performed as well. The encoding can generate an LDPC variable code rate and/or modulation signal whose code rate and/or modulation may vary as frequently as on a symbol by symbol basis. Some embodiments employ a common constellation shape for all of the symbols of the signal sequence, yet individual symbols may be mapped according different mappings of the commonly shaped constellation; such an embodiment may be viewed as generating a LDPC variable mapped signal. In general, any one or more of the code rate, constellation shape, or mapping of the individual symbols of a signal sequence may vary as frequently as on a symbol by symbol basis.Type: ApplicationFiled: June 29, 2012Publication date: October 25, 2012Applicant: BROADCOM CORPORATIONInventors: Ba-Zhong Shen, Hau Thien Tran, Kelly Brian Cameron
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Patent number: 8250432Abstract: Variable modulation within combined LDPC (Low Density Parity Check) coding and modulation coding systems. Variable modulation encoding of LDPC coded symbols is presented. In addition, LDPC encoding, that generates an LDPC variable code rate signal, may also be performed as well. The encoding can generate an LDPC variable code rate and/or modulation signal whose code rate and/or modulation may vary as frequently as on a symbol by symbol basis. Some embodiments employ a common constellation shape for all of the symbols of the signal sequence, yet individual symbols may be mapped according different mappings of the commonly shaped constellation; such an embodiment may be viewed as generating a LDPC variable mapped signal. In general, any one or more of the code rate, constellation shape, or mapping of the individual symbols of a signal sequence may vary as frequently as on a symbol by symbol basis.Type: GrantFiled: May 26, 2011Date of Patent: August 21, 2012Assignee: Broadcom CorporationInventors: Ba-Zhong Shen, Hau Thien Tran, Kelly Brian Cameron