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High-Speed Low-Power Viterbi Decoder Design for TCM Decoders

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  • High-speed, low-power design of Viterbi decoders for trellis coded modulation (TCM) systems is presented in this paper. It is well known that the Viterbi decoder (VD) is the dominant module determining the overall power consumption of TCM decoders. We propose a pre-computation architecture incorporated with T-algorithm for VD, which can effectively reduce the power consumption without degrading the decoding speed much. A general solution to derive the optimal pre-computation steps is also given in the paper. Implementation result of a VD for a rate-3/4 convolutional code used in a TCM system shows that compared with the full trellis VD, the pre-computation architecture reduces the power consumption by as much as 70% without performance loss, while the degradation in clock speed is negligible.
  • This is the author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by IEEE and can be found at: http://ieeexplore.ieee.org/xpl/tocresult.jsp?isnumber=6257480. ©2012 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.
  • Keywords: Trellis coded modulation (TCM), Viterbi decoder, VLSI
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  • He, J., Liu, H., Wang, Z., Huang, X., & Zhang, K. (2012). High-speed low-power viterbi decoder design for TCM decoders. IEEE Transactions on Very Large Scale Integration (VLSI) Systems, 20(4) 755-759. doi: 10.1109/TVLSI.2011.2111392
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  • 20
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  • 4
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