计算机工程与科学2017，Vol.39Issue(6)：1092-1096,5.DOI:10.3969/j.issn.1007-130X.2017.06.011
CDMA信号的时频差高精度估计算法
A high precision TDOA and FDOA estimation method for CDMA signals
韩煜1
作者信息
- 1. 通信信息控制和安全技术重点实验室,浙江嘉兴314033;中国电子科技集团公司第三十六研究所,浙江嘉兴314033
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摘要
Abstract
Given the overlap in time-frequency domain of code division multiple access (CDMA) multi-user signals,we propose a novel estimation method for time difference of arrival (TDOA) and frequency difference of arrival (FDOA).Based on the acquiring and dispreading of spread spectrum signals,with short-term signal samples and limited computation,the method adopts only two iterations of time-frequency searching to separate signals and estimate time frequency difference,and then uses the time domain and frequency domain interpolation to further improve estimation accuracy.Simulation results show that the presented algorithm can effectively improve the estimation accuracy of time-frequency difference of CDMA signals and lower the computational complexity in comparison with the cross ambiguity function correlation method.关键词
码分多址/时差估计/频差估计/互模糊函数Key words
CDMA/TDOA estimation/FDOA estimation/cross ambiguity function分类
信息技术与安全科学引用本文复制引用
韩煜..CDMA信号的时频差高精度估计算法[J].计算机工程与科学,2017,39(6):1092-1096,5.
