IMPLEMENTATION-ORIENTED METHOD OF BICM BASED ON LDPC CHECK MATRIX
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Issued Date -
Mar 21, 2013
app pub date -
May 29, 2012
filing date -
Sep 20, 2011
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Abstract
An IMPLEMENTATION-ORIENTED METHOD of Bit Interleaved Coded Modulation (BICM) based on a Low-Density Parity-Check (LDPC) check matrix including constructing an LDPC code having a block check matrix or providing an existing LDPC, where the block check matrix is divided into one or more sub-matrixes Hij with the size being B*B, constructing a BICM structure; in the BICM structure mapping an ith bit sequence [bitps(i,0), . . . , bitps(i,m−1)] with a length being m to obtain a mapping symbol s(i), where the size of a set of the mapping symbols s(i) is 2m; enabling mapping bits of all the mapping symbols s(i) of a mapping symbol subset S, =[s,(0), . . . s(i), . . . s(B−1)] to correspond to m check sub-matrixes. The mapping bits at the same position correspond to the same check sub-matrix, the number of which is m. Subsequently a receiver reads bit external information blocks corresponding to the mapping symbols during parallel soft demodulation, thereby implementing decoding feedback and fully exerting a joint receiving performance.
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