Conference paper Open Access

A Low-Complexity Dual Trellis Decoding Algorithm for High-Rate Convolutional Codes

Son Le, V.; Abdel Nour, C.; Douillard, C.; Boutillon, E.


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    "description": "<p>Decoding using the dual trellis is considered as a potential technique to increase the throughput of soft-input soft-output decoders for high coding rate convolutional codes. However, the dual Log-MAP algorithm suffers from a high decoding complexity. More specifically, the source of complexity comes from the soft-output unit, which has to handle a high number of extrinsic values in parallel. In this paper, we present a new low-complexity sub-optimal decoding algorithm using the dual trellis, namely the dual Max-Log-MAP algorithm, suited for high coding rate convolutional codes. A complexity analysis and simulation results are provided to compare the dual Max- Log-MAP and the dual Log-MAP algorithms. Despite a minor loss of about 0.2 dB in performance, the dual Max-Log-MAP algorithm significantly reduces the decoder complexity and makes it a first-choice algorithm for high-throughput high-rate decoding of convolutional and turbo codes.</p>", 
    "language": "eng", 
    "title": "A Low-Complexity Dual Trellis Decoding Algorithm for High-Rate Convolutional Codes", 
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    "keywords": [
      "Convolutional codes", 
      "High coding rate", 
      "Dual trellis", 
      "High-throughput decoder", 
      "Low-complexity decoder", 
      "Turbo codes"
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    "publication_date": "2020-08-04", 
    "creators": [
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        "affiliation": "IMT Atlantique", 
        "name": "Son Le, V."
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        "affiliation": "IMT Atlantique", 
        "name": "Abdel Nour, C."
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        "affiliation": "IMT Atlantique", 
        "name": "Douillard, C."
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        "affiliation": "IMT Atlantique", 
        "name": "Boutillon, E."
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    "meeting": {
      "acronym": "2020 IEEE WCNC", 
      "dates": "25-28 May 2020", 
      "place": "Virtual Conference", 
      "title": "IEEE Wireless Communications and Networking Conference 2020"
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