AT TOPPaper 1699 US-W-NDOWN
Protograph LDPC Codes over Burst Erasure Channels
Divsalar,DariushJet Propulsion Laboratory
Jones,ChristopherJet Propulsion Laboratory
Dolinar,SamJet Propulsion Laboratory
In this paper we design high rate protograph based LDPC codes suitable for binary erasure channels. To simplify the encoder and decoder implementation for high data rate transmission, the structure of codes are based on protographs and circulants. These LDPC codes can improve data link and network layer protocols in support of communication networks. Two classes of codes were designed. One class is designed for large block sizes with an iterative decoding threshold that approaches capacity of binary erasure channels. The other class is designed for short block sizes based on maximizing minimum stopping set size. For high code rates and short blocks the second class outperforms the first class. A scheme is proposed to use these LDPC codes over burst erasure channels. The proposed encoding method is also applicable to cases when packets are frequency hopped over channels with partial band jamming or frequency selective fading. Various LDPC codes are compared and simulation results are provided.
Dariush Divsalar received his Ph.D. degree in Electrical Engineering from UCLA in 1978. Since then, he has been with Jet Propulsion Laboratory (JPL), California Institute of Technology (Caltech), Pasadena, where he is a principal scientist. At JPL, he was working on developing state-of-the-art technology for advanced deep space communications systems and future NASA space exploration and Mobile and Satellite Communications. Since 1986, he has taught graduate courses at UCLA and Caltech. He has published more than 150 papers, coauthored a book entitled "An Introduction to Trellis Coded Modulation with Applications" (New York: MacMillan, 1991) and holds ten U.S. patents in the above areas. He is the co-recipient of the 1986 Prize Paper Award in Communications for the IEEE Transactions on Vehicular Technology. Recently, one of his papers has been selected as one of the key research papers published by the IEEE Communications Society during the past five decades. He has received over 25 NASA Tech Brief awards and a NASA Exceptional Engineering Achievement Medal in 1996. He served as Editor and Area Editor in Coding and Communication Theory for the IEEE Transactions on Communications from 1989 to 1996. He is a Fellow of IEEE .