[1]殷奎喜,岸政七,许根稳.平滑化的正交型Walsh函数的构造及在广带域扩谱通讯中的应用[J].东南大学学报(自然科学版),1999,29(6):21-26.[doi:10.3969/j.issn.1001-0505.1999.06.005]
 Yin Kuixi,Kishi Masahichi,Xu Genwen.Structure of Smoothing and Orthogonal Walsh Function and Applied to the Spread-Spectrum Communication System[J].Journal of Southeast University (Natural Science Edition),1999,29(6):21-26.[doi:10.3969/j.issn.1001-0505.1999.06.005]
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平滑化的正交型Walsh函数的构造及在广带域扩谱通讯中的应用()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
29
期数:
1999年第6期
页码:
21-26
栏目:
信息与通信工程
出版日期:
2000-11-20

文章信息/Info

Title:
Structure of Smoothing and Orthogonal Walsh Function and Applied to the Spread-Spectrum Communication System
作者:
殷奎喜1 岸政七2 许根稳1
1 南京师范大学物理系,南京 210097; 2 日本爱知工业大学,日本 470-0356
Author(s):
Yin Kuixi1 Kishi Masahichi2 Xu Genwen1
1 Physical department of Nanjing Normal University, Nanjing 210097
2 The AIT of Japan. 470-0356
关键词:
平滑化 扩谱 伪随机 码分多址
Keywords:
smoothing function spread spectrum pseudo-noise code division multi-address
分类号:
TN914.42
DOI:
10.3969/j.issn.1001-0505.1999.06.005
摘要:
介绍了一种二维离散正交型Walsh函数的构成与相关特性,将离散的Walsh 函数进行平滑化之后,应用在广带域码分多址扩散频谱通讯中(简称CDMA扩谱通讯).本文还发表了一种码分多址扩谱通讯的结构框图和通过各种复杂环境通讯实验结果.对比实验结果表明,平滑化的离散正交型Walsh 函数与非平滑化的离散正交型Walsh函数作为在扩谱码,信号频带宽度之比为1:2, 用Walsh函数(哈德码序列)的正交码,目的是各种信道之间的相互干扰达到最小化.平滑化技术在同等的条件下,信噪比提高了20 dB以上.说明这是一种非常成功的理论方法.
Abstract:
In this paper, we introduced the structure and correlative property of discrete Walsh function. After transform discrete Walsh function into smoothing Walsh function, that is applied to the spread-spectrum communication system that name differential code CDMA (diffCDMA). We also proposed block diagram of diffCDMA and proposed computer simulation results through the multi-ray propagation environment. The result is shown that the frequency bandwidth of the smoothing Walsh sequence code is equal to a half of frequency bandwidth of the no-smoothing Walsh sequence code. The smoothing and orthogonal Walsh function sequence code act as spread-spectrum code, our aim is to reduce the multi-ray fading 20 dB under same experiment condition. The commuter simulations are verified for smoothing Walsh function to be successful method in the spread-spectrum communication system.

参考文献/References:

[1] 横山光雄.スペクトル 扩散通信システム.东京:日本技术出版社,1995.424~434
[2] Masahishi Kishi,Kuixi Yin,Iwata.Consideration on system capability characteristics of portable 2 Mbps/8 Mc/s CDMA with phase continuous QPSK.IEEE VTC’98.Ottawa:1998.924~928
[3] 杨义先,林须端.编码密码学.北京:人民邮电出版社,1992.21
[4] Masahishi Kishi,Kuixi Yin.Transmission characteristics of the 1.6 Mb/s/4 Mc/s diffCDMA with continuous chip shaping over 4 MHz bandwidth channel occupation.IEEE PIMRC’99.Osaka:1999.1550~1555

备注/Memo

备注/Memo:
第一作者:男 1949年生, 副教授.
更新日期/Last Update: 1999-11-20