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Bit-interleaved coded modulation with iterative decoding using constellation shaping over Rayleigh fading channels
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DOI：10.1016/j.aeue.2006.06.005.png)
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We propose to investigate the performance of bit-interleaved coded modulation with iterative decoding (BICM-ID) over Rayleigh fading channel by using constellation shaping (CS). The (CS) is implemented by inserting shaping block codes between mapping and channel coding functions, in order to generate non-equiprobable distribution of a Wary QAM signal constellation. Simulation results carried out on 2-bit/s/Hz 16-QAM BICM-ID indicate that is possible to obtain a gain of 1.2 dB at a BER of 10(-3) compared to the equiprobable 16-QAM BICM-ID schemes. It is also shown that, the error floor level can reduced by applying the signal space diversity technique. (C) 2006 Elsevier GmbH. All rights reserved.
Keyword:
bit-interleaved coded modulation with iterative decoding (BICM-ID)
constellation shaping
IQ interleaving
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