Improving 3D-Turbo Code's BER Performance with a BICM System over Rayleigh Fading Channel
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Date
2016-12
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Mark
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Společnost pro radioelektronické inženýrství
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Abstract
Classical Turbo code suffers from high error floor due to its small Minimum Hamming Distance (MHD). Newly-proposed 3D-Turbo code can effectively increase the MHD and achieve a lower error floor by adding a rate-1 post encoder. In 3D-Turbo codes, part of the parity bits from the classical Turbo encoder are further encoded through the post encoder. In this paper, a novel Bit-Interleaved Coded Modulation (BICM) system is proposed by combining rotated mapping Quadrature Amplitude Modulation (QAM) and 3D-Turbo code to improve the Bit Error Rate (BER) performance of 3D-Turbo code over Raleigh fading channel. A key-bit protection scheme and a Two-Dimension (2D) iterative soft demodulating-decoding algorithm are developed for the proposed BICM system. Simulation results show that the proposed system can obtain about 0.8-1.0 dB gain at BER of 10^{-6}, compared with the existing BICM system with Gray mapping QAM.
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Radioengineering. 2016 vol. 25, č. 4, s. 790-800. ISSN 1210-2512
http://www.radioeng.cz/fulltexts/2016/16_04_0790_0800.pdf
http://www.radioeng.cz/fulltexts/2016/16_04_0790_0800.pdf
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Peer-reviewed
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en