Recent Patents in Signal Processing (December 2012) - Channel Coding

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Recent Patents in Signal Processing (December 2012) - Channel Coding

For the December 2012 edition, we focus on recent patents in Channel Coding. The selection below includes patents issued in the recent past in the design of error correcting codes for reliable signal transmission and newer applications such as code design for distributed source coding and the use of error prone channels for secure communication.

US 8,321,752, "Integrated 2-level low density parity check (LDPC) codes", by X. Yang and N. Varnica, filed 28 October 2009, issued 27 November 2012, assigned to Marvell International Ltd. (Hamilton, BM).

US 8,320,499, "Dynamic space-time coding for a communication system", by J. Blanz and H. Schotten, filed 3 March 2006, issued 27 November 2012, assigned to QUALCOMM Incorporated (San Diego, CA).

US 8,315,306, "Distributed joint source-channel coding of video using raptor codes", by Q. Xu, V. Stankovic and Z. Xiong, filed 8 September 2006, issued 20 November 2012, assigned to The Texas A&M University System (College Station, TX).

US 8,301,984, "QC-LDPC decoder with list-syndrome decoding", by Y. Zhang, H. Song, and G. Burd, filed 15 February 2012, issued 30 October 2012, assigned to Marvell International Ltd. (Hamilton, BM).

US 8,301,979, "Low density parity code (LDPC) decoding for memory with multiple log likelihood ratio (LLR) decoders", by E. Sharon, I. Alrod, A. Navon and O. Lieber, filed 7 October 2009, issued 30 October 2012, assigned to SanDisk IL Ltd. (Kfar Saba, Israel).

US 8,280,046, "Method and system for deriving an encryption key using joint randomness not shared by others", by M. Rudolf and R. Mukherjee, filed 23 December 2005, issued 2 October 2012, assigned to InterDigital Technology Corporation (Wilmington, DE).

US 8,275,322, "Rateless coding for multiuser interference relay channel", by M. Khojastepour and X. Wang, filed 29 April 2009, issued 25 September 2012, assigned to NEC Laboratories America, Inc. (Princeton, NJ).

US 8,261,167, "Cyclically interleaved dual BCH, with simultaneous decode and per-codeword maximum likelihood reconciliation", by P. Northcott, filed 9 March 2010, issued 4 September 2012, assigned to PMC-Sierra US, Inc. (Santa Clara, CA).

US 8,250,432, "Variable modulation with LDPC (low density parity check) coding", by B.-Z. Shen, H. Tran and K. Cameron, filed 26 May 2011, issued 21 August 2012, assigned to Broadcom Corporation (Irvine, CA).

US 8,245,097, "Iterative decoding of punctured low-density parity check codes by selection of decoding matrices", by W. Mow and X. Wu, filed 27 April 2009, issued 14 August 2012, assigned to Kan Ling Capital, L.L.C. (Wilmington, DE).

If you have an interesting patent to share when we next feature patents on channel coding or digital communication, or if you are especially interested in a signal processing research field that you would want to be highlighted in this section, please send email to Shantanu Rane (rane AT merl DOT com).

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