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Bandwidth Efficient Low Density Parity Check Coding
using Multi Level Coding and Iterative Multi Stage Decoding
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Turbo Symp. 2000
Brest, France
July, 2000
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K. R. Narayanan, J. Li
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Abstract --
The Design of bandwidth efficient codes using low density parity check
codes (LDPC) is studied. Bit interleaved coded modulation using LDPC codes
and multilevel coding using LDPC codes are considered. An iterative decoding
strategy which includes soft-decision feedback between the lower and higher
levels in a multilevel coding scheme is proposed. Some practical
considerations in designing LDPC codes with multilevel coding are addressed
and, finally, the bit error rate performance and decoding complexity of
the proposed coding techniques are compared with those of turbo trellis
coded modulation techniques.
Keywords --
Low density parity check (LDPC) codes, bandwidth efficient coding,
mutli-level coding (MLC) with iterative multi-stage decoding (MSD),
bit interleaved coded modulation (BICM), iterative decoding
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