Double M-ary/Spread Spectrum Communication Systems (Special Section on Information Theory and Its Applications)
スポンサーリンク
概要
- 論文の詳細を見る
In this paper, to obtain higher spectral efficiency than a conventional M-ary/Spread spectrum (SS) communication system using an orthogonal code, we propose Double M-ary/SS communication systems in which transmitting sequences are produced by multiplying two sequences obtained from different M-ary/SS systems. First, we estimate the system performance of a Double M-ary/SS in which transmitting sequences are composed of two kinds of sequences which have the same chip duration and the same sequence length in AWGN environment by theoretical analysis and computer simulations using random sequences. And we show that the bit error rate (BER) of the system can be improved, compared to that of the conventional M-ary/SS. Next, we propose two concrete examples of the Double M-ary/SS systems. We investigate the performance of these systems in AWGN environment by computer simulations, and show that the BER and spectral efficiency can be improved by the two systems compared to those of the conventional M-ary/SS. Further, we consider a modified method of the demodulation for one of the examples of Double M-ary/SS systems, and show that we can reduce quantity of calculations by the method.
- 社団法人電子情報通信学会の論文
- 1998-10-25
著者
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Takauchi Kentaro
Renesas Technology Corp.
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Hamamura M
Department Of Information Systems Engineering Kochi University Of Technology
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TAKAUCHI Kentaro
Faculty of Engineering, Nagaoka University of Technology
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HAMAMURA Masanori
Faculty of Engineering, Nagaoka University of Technology
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Takauchi Kentaro
Faculty Of Engineering Nagaoka University Of Technology
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Tachikawa Sin'ichi
Faculty Of Engineering Nagaoka University Of Technology
関連論文
- Double M-ary/Spread Spectrum Communication Systems (Special Section on Information Theory and Its Applications)
- Synchronous Acquisition Methods with Code-Orthogonalizing Filters in DS/CDMA over Multipath Fading Channels
- A Modified Acquisition Method Using Code-Orthogonalizing Filters in Asynchronous DS/CDMA (Special Section on Spread Spectrum Techniques and Applications)