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Rate-Compatible Punctured Bit-Interleaved Coded Modulation for Mobile Satellite Communications
Tadashi MINOWA
Publication
IEICE TRANSACTIONS on Communications
Vol.E87-B
No.8
pp.2082-2089 Publication Date: 2004/08/01 Online ISSN:
DOI: Print ISSN: 0916-8516 Type of Manuscript: Special Section PAPER (Special Section on Recent Fundamental Technologies for Broadband Satellite Communications) Category: Keyword: bit-interleaved coded modulation, iterative decoding, mobile satellite communication, Rayleigh fading, punctured convolutional codes,
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Summary:
Fading in mobile satellite communications severely degrades the performance of data transmission. It is commonly modeled with non-frequency selective Rayleigh fading. For this type of channel, a new structure for a bit-interleaved coded modulation (BICM) scheme is presented and evaluated to determine its effectiveness compared to previously proposed schemes. This scheme is referred to as rate-compatible punctured BICM (RCP-BICM), in that its BICM encoder is able to yield a wide range of data rates by using a punctured convolutional code obtained by periodically perforating parity bits from the output of a low-rate-1/2 systematic convolutional code. A trellis-coded modulation (TCM) scheme and a turbo TCM (TTCM) scheme are discussed and evaluated for comparison with the RCP-BICM scheme. Simulation results demonstrate that the RCP-BICM scheme with hard-decision iterative decoding is superior to the TCM scheme by 3 dB at a bit error rate (BER) of 10-5 over an Rayleigh fading channel, and comes at a BER of 10-5 within 1 dB of the TCM scheme over an additive white Gaussian noise (AWGN) channel.
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