On the higher efficiency of parallel Reed-Solomon turbo-decoding

Cédric Leroux (1) , Christophe Jego (2, 1) , Patrick Adde (2, 1) , Michel Jezequel (2, 1)

1 ELEC - Département Electronique
2 Lab-STICC_TB_CACS_IAS

In this paper, we demonstrate the higher hardware efficiency of Reed-Solomon (RS) parallel turbo decoding compared with BCH parallel turbo decoding. Based on an innovative architecture, this is the first implementation of fully parallel RS turbo decoder. A performance analysis is performed showing that RS block turbo codes (RS-BTC) have decoding performance equivalent to Bose Ray-Chaudhuri Hocquenghem-block turbo codes (BCH-BTC). A ratio between the decoder throughput and the decoder area is used to show the higher efficiency of the RS full parallel turbo decoder. Finally an implementation of a (31,29)2 RS block turbo decoder on a high performance board including 6 Xilinx Virtex5 FPGAs is detailed. The resulting turbo decoder has an information throughput above 6 Gb/s while the working frequency is only 45 MHz. It shows that RS BTC are an attractive solution for low cost Gb/s fiber optical communications.

Mots clés: BCH parallel turbo decoding; Bose Ray-Chaudhuri Hocquenghem-block turbo codes; RS block turbo codes; fiber optical communications; parallel Reed-Solomon turbo-decoding; BCH codes; Reed-Solomon codes; block codes; optical communication; turbo codes

Domaines: Electronique

Cédric Leroux, Christophe Jego, Patrick Adde, Michel Jezequel. On the higher efficiency of parallel Reed-Solomon turbo-decoding. Electronics, Circuits and Systems, 2008. ICECS 2008. 15th IEEE International Conference on, Aug 2008, St. Julian's, Malta. pp.1308 -1311, ⟨10.1109/ICECS.2008.4675100⟩. ⟨hal-00538607⟩