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High coded data rate and multicodeword WiMAX LDPC decoding on the Cell/BE

Falcão, G. ; Silva, V. ; Sousa, L. ; Marinho, J. S. M.

Measurement: Journal of the International Measurement Confederation Vol. 44, Nº 24, pp. 1415 - 1416, November, 2008.

ISSN (print): 0263-2241
ISSN (online): 0263-2241

Journal Impact Factor: 0,662 (in 2008)

Digital Object Identifier: 10.1049/el:20081927

Abstract
This Letter proposes a novel, flexible and scalable parallel LDPC decoding approach for the WiMAX wireless broadband standard (IEEE 802.16e) in the multicore Cell Broadband Engine Architecture. A multicodeword LDPC decoder performing the simultaneous decoding of 96 codewords is presented. The throughput achieved ranges from 72 to 80 Mbps, which compares well with VLSI-based decoders and is superior to the maximum throughput required by the WiMAX standard performing in worst case conditions. The 8-bit precision arithmetic adopted shows additional advantages over traditional 6-bit precision dedicated VLSI-based solutions, allowing better error floors and BER performance.