Error Floor Removal for Bit-Interleaved Coded Modulation with Iterative Detection

The performance of bit-interleaved coded modulation with iterative detection (BICM-ID) depends strongly on the chosen constellation mapping. In this paper, we present an EXIT chart analysis of a number of mappings that have been designed especially for BICM-ID. This analysis reveals that all these m...

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Bibliographic Details
Published in:IEEE transactions on wireless communications 2006-11, Vol.5 (11), p.3174-3181
Main Authors: Pfletschinger, S., Sanzi, F.
Format: Article
Language:English
Subjects:
Applied sciences
Bit error rate
Coding
Complexity
Constellations
Convolutional codes
Doping
Error detection
Exact sciences and technology
Interference
Interleaved codes
Iterative decoding
Mapping
Modulation
Modulation coding
Quadrature amplitude modulation
Receivers
Redundancy
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Transmission and modulation (techniques and equipments)
Transmitters
Wireless communication
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Summary:The performance of bit-interleaved coded modulation with iterative detection (BICM-ID) depends strongly on the chosen constellation mapping. In this paper, we present an EXIT chart analysis of a number of mappings that have been designed especially for BICM-ID. This analysis reveals that all these mappings inevitably yield a bit error rate floor, which cannot be overcome by increasing the number of iterations or other measures taken at the receiver side. In order to remove this error floor, we introduce an inner code based on differential encoding with code doping. This coding scheme is of low complexity and introduces no additional redundancy. Two detection schemes of different complexity and similar performance are presented. This enhanced BICM scheme is applied to V-BLAST and a new concept to iteratively mitigate the multi-stream interference is presented
ISSN:1536-1276
1558-2248
DOI:10.1109/TWC.2006.05163