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›› 2011, Vol. 28 ›› Issue (2): 246-252.DOI: 10.7523/j.issn.2095-6134.2011.2.017

• Research Articles • Previous Articles     Next Articles

Low-complexity joint source-channel decoding based on variable length encoded Turbo codes

CHEN Shao-Hong1, ZHANG Can1,2, TU Guo-Fang1, HUO Yue-Heng1   

  1. 1. School of Information Science and Engineering, Graduate University, Chinese Academy of Sciences, Beijing 100049, China;
    2. State Key Laboratory of Information Security, Beijing 100049, China
  • Received:2010-04-26 Revised:2010-05-10 Online:2011-03-15

Abstract:

Variable length encoded Turbo codes (VL Turbo codes) with constructed joint decoding plane trellis has better decoding performance than the bit-level decoding algorithm. However the plane trellis is complicated, resulting in a high decoding complexity of VL Turbo codes. We construct a space trellis and propose a low-complexity JSCD approach based on VL Turbo codes. Simulation results show that the proposed approach reduces the decoding complexity by 3.8%, compared to the plane trellis, and the gain of Eb/N0 is about 0.2dB at SER=10-4.

Key words: JSCC/D, VL Turbo codes, space trellis, VLS-APP

CLC Number: