A new method to estimate DOA in CDMA system in multi-path environment  

作　　者：单志勇 周希朗 张琪 

机构地区：[1]College of Information Science and Technology, Donghua University,Shanghai 200051, China,Department of Electronic Engineering, Shanghai Jiaotong University, Shanghai 200030,China [2]Department of Electronic Engineering,Shanghai Jiaotong University, Shanghai 200030,China

出　　处：《Journal of Central South University of Technology》2006年第3期270-274,共5页中南工业大学学报（英文版）

基　　金：Project supported by the National Defense Pre-research Foundation

摘　　要：An algorithm for direction angle of arrival(DOA) estimation and array calibration of signals from multiple mobile users in the CDMA systems and multi-path environment was presented . The main idea is that the algorithm employs code-matched filter and model of the inter-symbol interference and multiple-access interference exactly. The correlation matrices of the received signals before and after code-matched filtering were employed to eliminate the effect of the additive white Gaussian noise, and a new mathematical problem was created, a new maximum likelihood method based on the strong law of large number was derived for DOA estimation and array calibration. Computer simulation results prove that the algorithm is effective.An algorithm for direction angle of arrival（DOA） estimation and array calibration of signals from multiple mobile users in the CDMA systems and multi-path environment was presented . The main idea is that the algorithm employs code-matched filter and model of the inter-symbol interference and multiple-access interference exactly. The correlation matrices of the received signals before and after code-matched filtering were employed to eliminate the effect of the additive white Gaussian noise, and a new mathematical problem was created, a new maximum likelihood method based on the strong law of large number was derived for DOA estimation and array calibration. Computer simulation results prove that the algorithm is effective.

关 键 词：DOA CDMA MULTI-PATH code-matched filter 

分 类 号：TN929.533[电子电信—通信与信息系统]