We consider the design and analysis of low-rate codes, generalized low-density parity-check (GLDPC) codes and the variations, repeat-zigzag-Hadamard (RZH) codes, in AWGN channels. The code ensembles of GLDPC and RZH codes can be optimized using Extrinsic information transfer (EXIT) charts. The simulation results show that a rate-0.003 LDPC-Hadamard code built from designed code ensemble with large block length performs only 0.15 dB away from the ultimate Shannon limit (-1.592 dB). Those low-rate codes are the promising candidates for the channel coding in the applications of sensor network, ultra-wideband communications and code-spread CDMA systems.

Dr. Guosen Yue received the B.S. degree in physics and the M.S. degree in electrical engineering from Nanjing University, Nanjing, China in 1994 and 1997, and the Ph.D. degree from Texas A&M University , College Station, TX, in 2004.

Since August 2004, he has been a Staff Member with the Mobile and Signal Processing Department, NEC Laboratories American, Princeton, New Jersey, conducting research on broadband wireless systems and mobile networks. His research interests are in the general area of wireless communications and signal processing, specifically in channel coding, MIMO, OFDM, and iterative processing.