张天骐
重庆邮电大学信号与信息处理重庆市重点实验室? ?重庆? ?400065
基金项目:国家自然科学基金(61671095, 61371164)，信号与信息处理重庆市市级重点实验室建设项目(CSTC2009CA2003)，重庆市****基金(CSTC2011jjjq40002)
详细信息
作者简介:周杨：男，1989年生，博士，研究方向为通信信号的盲处理
张天骐：男，1971年生，博士后，教授，研究方向为通信信号的调制解调、盲处理、语音信号处理、神经网络实现以及FPGA实现
通讯作者:周杨 zhouyang@cqupt.edu.cn
中图分类号:TN911.7计量
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被引次数:0
出版历程
收稿日期:2018-08-17
修回日期:2019-02-27
网络出版日期:2019-03-18
刊出日期:2019-07-01
Blind Estimation of the Pseudo Noise Sequence and Information Sequence for Short Code Synchronous and Asynchronous DS-CDMA Signal
Yang ZHOU,,Tianqi ZHANG
Chongqing Key Laboratory of Signal and Information Processing, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
Funds:The National Natural Science Foundation of China (61671095, 61371164), The Project of Key Laboratory of Signal and Information Processing of Chongqing (CSTC2009CA2003), The Chongqing Distinguished Youth Foundation (CSTC2011jjjq40002)
摘要
摘要:针对传统单通道异步直接序列码分多址(DS-CDMA)信号信息序列及伪码序列(PN)难以估计的问题，该文提出一种基于平行因子(PARAFAC)的多通道盲估计方法。该方法首先将信号建模为多通道接收模型，然后将观测数据矩阵等效为平行因子模型，最后使用迭代最小二乘算法对平行因子进行低秩分解，进一步完成对DS-CDMA信号各用户的信息序列及伪码序列进行估计。仿真实验表明，该方法不仅能有效地对同步、异步短码DS-CDMA信号的伪码序列及信息序列进行估计，而且能在通道数为6、信噪比(SNR)为–10 dB的条件下，实现10个用户伪码序列的有效估计。
关键词:直接序列码分多址信号/
平行因子/
信息序列/
伪码序列
Abstract:For the problem of Direct Sequence-Code Division Multiple Access (DS-CDMA) signal in traditional asynchronous single-channel, including blind estimation of the Pseudo-Noise (PN) sequence and information sequence, a method using multi-channel synchronous and asynchronous based on PARAllel FACtor (PARAFAC) is proposed. Firstly, the signal is modeled as a multi-channel receiving model, then the observed data matrix is equivalent to a factor model. Finally, the iterative least squares algorithm is applied to decomposing the parallel factor, and the information sequence and PN sequences of DS-CDMA signals are further estimated. The simulation results show that the proposed method can effectively estimate the PN sequence and information sequence of the short code DS-CDMA signal, and the estimation of 6 user PN sequences can be realized under the condition that the number of channels is 10 and the Signal-to-Noise Ratio (SNR) is –10 dB.
Key words:Direct Sequence-Code Division Multiple Access (DS-CDMA) signal/
PARAllel FACtor (PARAFAC)/
Information sequence/
Pseudo Noise (PN) sequence
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