Iterative Demodulation and Decoding for Parallel Combinatorial SS Systems(Special Section on Spread Spectrum Techniques and Applications)
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概要
- 論文の詳細を見る
This paper proposes iterative demodulation/decoding for parallel combinatorial spread spectrum(PC/SS)systems. A PC/SS system conveys information data by a combination of pre-assigned orthogonal spreading sequences with polarity. In this paper, convolutional coding with a uniform random interleaver is implemented in channel coding, just like as a serial concatenated coding. A 'soft-in/soft-out' PC/SS demodulator based on a posteriori probability algorithm is proposed to perform the iterative demodulation and decoding. Simulation results demonstrate that the proposed iterative demodulation/decoding scheme bring significant improvement in bit error rate performance. This proposed decoding scheme achieves highspeed transmission by two approaches. One is a puncturing operation, and the other is to increase the number of transmitting sequences. In the latter approach, lower error rate performance is achieved comparing with that the punctured convolutional code is used to increase the information bit rate.
- 社団法人電子情報通信学会の論文
- 2001-12-01
著者
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TAKIZAWA Ken-ichi
Niigata University
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SASAKI Shigenobu
the Department of Electrical and Electronic Engineering, Faculty of Engineering, Niigata University
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KIKUCHI Hisakazu
the Department of Electrical and Electronic Engineering, Faculty of Engineering, Niigata University
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Muramatsu S
Department Of Electrical And Electronic Engineering Niigata University
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Muramatsu Shogo
Niigata Univ. Niigata Jpn
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Kikuchi Hisakazu
Niigata Univ. Niigata Jpn
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Kikuchi Hisakazu
Dept. Of Electrical And Electronic Eng. Niigata University
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Muramatsu Shogo
The Department Of Electrical And Electronic Engineering Faculty Of Engineering Niigata University
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Takizawa K
National Inst. Of Information And Communications Technol. Yokosuka‐shi Jpn
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TAKIZAWA Ken-ichi
the Graduate School of Science and Technology, Niigata University
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