Journal article Open Access

Protograph-Based Interleavers for Punctured Turbo Codes

Garzón Bohórquez, Ronald; Abdel Nour, Charbel; Douillard, Catherine


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    "title": "Protograph-Based Interleavers for Punctured Turbo Codes", 
    "language": "eng", 
    "journal": {
      "title": "IEEE Transactions on Communications"
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    "keywords": [
      "Turbo codes", 
      "Protograph", 
      "Puncturing pattern", 
      "Interleaver", 
      "Span", 
      "Correlation girth"
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    "publication_date": "2017-12-15", 
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        "name": "Garz\u00f3n Boh\u00f3rquez, Ronald"
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        "name": "Abdel Nour, Charbel"
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        "name": "Douillard, Catherine"
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    "description": "<p>A method to design efficient puncture-constrained&nbsp;interleavers for turbo codes (TCs) is introduced. Resulting TCs&nbsp;profit from a joint optimization of puncturing pattern and&nbsp;interleaver to achieve an improved error rate performance. First,&nbsp;the puncturing pattern is selected based on the constituent&nbsp;code Hamming distance spectrum and on the TC extrinsic&nbsp;information exchange under uniform interleaving. Then, the&nbsp;interleaver function is defined via a layered design process&nbsp;taking account of several design criteria such as minimum span,&nbsp;correlation girth, and puncturing constraints. We show that&nbsp;applying interleaving with a periodic cross connection pattern&nbsp;that can be assimilated to a protograph improves error-correction&nbsp;performance when compared to the state-of-the-art TCs. An&nbsp;application example is elaborated and compared with the long&nbsp;term evolution (LTE) standard: a significant gain in performance&nbsp;can be observed. An additional benefit of the proposed technique&nbsp;resides in the important reduction of the search space for the&nbsp;different interleaver parameters.</p>"
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