Optimization of 3-phase spreading sequences of Markov chains

Optimization of 3-phase spreading sequences of Markov chains
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马尔可夫链三相扩频序列的优化

DOI:
10.1109/iscas.2003.1204971
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发表时间:
2003
期刊:
Proceedings of the 2003 International Symposium on Circuits and Systems, 2003. ISCAS '03.
影响因子:
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通讯作者:
H. Fujisaki
H. Fujisaki
中科院分区:
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文献类型:
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作者:
H. Fujisaki

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最近人们不仅对马氏链的二元扩频序列感兴趣,而且对L=3,4,…的马氏链的L相扩频序列也产生了浓厚的兴趣.在非同步扩频多址(SSMA)通信系统中,我们需要这种序列的相关值的方差来估计误码率。请注意,L相序列的相关值通常为复数值。在以前的文章中,我们考虑了由一般的三态简单马尔可夫链产生的三相扩频序列,并估计了它们的相关值在复平面上的绝对值的方差。本文估计了它们的相关值的实部的方差,并根据误码率给出了马尔可夫链的最优三相扩频序列。
There has recently been intense interest in not only binary but also L-phase spreading sequences of Markov chains, where L=3,4, .... We need variances of correlation values of such sequences to evaluate bit error probabilities in asynchronous SSMA (spread spectrum multiple access) communication systems. Note that correlation values of L-phase sequences generally take complex values. In previous paper, we have considered 3-phase spreading sequences generated by general 3-state simple Markov chains, and have evaluated the variances of the absolute values of their correlation values in the complex plane. In this paper, we evaluate the variances of the real part of their correlation values, and give the optimum 3-phase spreading sequences of Markov chains in terms of bit error probabilities in asynchronous SSMA communication systems.
DOI: 10.1109/tcsi.2002.805703
发表时间: 2001-12
期刊: --
影响因子: --
作者:
H. Fujisaki
通讯作者: H. Fujisaki
基于偏差的信道估计第二部分:DS-CDMA
DOI: --
发表时间: 2009
期刊:
影响因子: --
作者:
木寺正平;阪本卓也;佐藤亨;尾崎光紀;竹内啓悟
通讯作者: 竹内啓悟