Block puncturing for turbo code based incremental redundancy

Abstract

A method of block puncturing for turbo code based incremental redundancy includes a first step ( 1200 ) of coding an input data stream into systematic bits and parity bits. A next step ( 1202 ) includes loading the systematic bits and parity bits into respective systematic and parity block interleavers in a column-wise manner. A next step ( 1204 ) includes selecting a predefined redundancy. A next step ( 1206 ) includes outputting bits from the block interleavers in a row-wise manner in accordance with the selected predefined redundancy.

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       21 . A method of bit priority mapping a turbo codeword, the method comprising the steps of: 
 associating predefined disjoint areas of an array with differing bit reliability positions offered by a constellation;    loading the punctured systematic turbo codeword bits and punctured parity turbo codeword bits into the array, giving higher priority to one set of bits when loading a predefined disjoint area; and    continuously gathering bits from all distinct disjoint areas to form a symbol.    
   
   
       22 . The method of  claim 21 , wherein: 
 the number of rows in the array is log 2 (M) where M is the constellation order;    sets of rows are associated with bit reliability positions offered by a constellation;    data is read out of the array on a column wise basis each column wholly associated with one modulated symbol.