Journal article Open Access

Protograph-Based Interleavers for Punctured Turbo Codes

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


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        <foaf:name>Garzón Bohórquez, Ronald</foaf:name>
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        <foaf:name>Abdel Nour, Charbel</foaf:name>
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        <foaf:familyName>Abdel Nour</foaf:familyName>
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        <foaf:name>Douillard, Catherine</foaf:name>
        <foaf:givenName>Catherine</foaf:givenName>
        <foaf:familyName>Douillard</foaf:familyName>
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    <dct:title>Protograph-Based Interleavers for Punctured Turbo Codes</dct:title>
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    <dct:issued rdf:datatype="http://www.w3.org/2001/XMLSchema#gYear">2017</dct:issued>
    <dcat:keyword>Turbo codes</dcat:keyword>
    <dcat:keyword>Protograph</dcat:keyword>
    <dcat:keyword>Puncturing pattern</dcat:keyword>
    <dcat:keyword>Interleaver</dcat:keyword>
    <dcat:keyword>Span</dcat:keyword>
    <dcat:keyword>Correlation girth</dcat:keyword>
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        <foaf:name>European Commission</foaf:name>
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    <dct:issued rdf:datatype="http://www.w3.org/2001/XMLSchema#date">2017-12-15</dct:issued>
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    <dct:description>&lt;p&gt;A method to design efficient puncture-constrained&amp;nbsp;interleavers for turbo codes (TCs) is introduced. Resulting TCs&amp;nbsp;profit from a joint optimization of puncturing pattern and&amp;nbsp;interleaver to achieve an improved error rate performance. First,&amp;nbsp;the puncturing pattern is selected based on the constituent&amp;nbsp;code Hamming distance spectrum and on the TC extrinsic&amp;nbsp;information exchange under uniform interleaving. Then, the&amp;nbsp;interleaver function is defined via a layered design process&amp;nbsp;taking account of several design criteria such as minimum span,&amp;nbsp;correlation girth, and puncturing constraints. We show that&amp;nbsp;applying interleaving with a periodic cross connection pattern&amp;nbsp;that can be assimilated to a protograph improves error-correction&amp;nbsp;performance when compared to the state-of-the-art TCs. An&amp;nbsp;application example is elaborated and compared with the long&amp;nbsp;term evolution (LTE) standard: a significant gain in performance&amp;nbsp;can be observed. An additional benefit of the proposed technique&amp;nbsp;resides in the important reduction of the search space for the&amp;nbsp;different interleaver parameters.&lt;/p&gt;</dct:description>
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