|
|||||
|
|
| CDMA系统中多用户多路径情况下的DOA估计新方法 | |
| 引用本文： | 单志勇,杨世达,周希朗. CDMA系统中多用户多路径情况下的DOA估计新方法[J]. 系统工程与电子技术, 2007, 29(4): 528-531 |
| 作者姓名： | 单志勇 杨世达 周希朗 |
| 作者单位： | 1. 东华大学信息学院通信系,上海,200051;武汉理工大学计算机系,湖北,武汉,430070 2. 武汉理工大学计算机系,湖北,武汉,430070 3. 上海交通大学信息学院电子系,上海,200030 |
| 摘 要： | 提出了一种新型算法,对CDMA系统中所有用户、所有路径的DOA进行估计。该算法首先采用码匹配滤波方法,对码间干扰和符号间干扰进行精确建模,再利用接收信号滤波前后的协方差矩阵消除噪声的影响并且巧妙设计了一个方程,最后导出了一个基于大数定律的联合DOA估计和阵列校准的新型最大似然估计。仿真结果证明了该算法的正确有效性。 |
| 关 键 词： | 码分多址 波达角 通信系统 信号处理 |
| 文章编号： | 1001-506X(2007)04-0528-04 |
| 修稿时间： | 2006-01-11 |
Joint DOA estimation and array calibration in the DS-CDMA systems in the multi-path environment using uniform linear array |
|
| SHAN Zhi-yong,YANG Shi-da,ZHOU Xi-lang. Joint DOA estimation and array calibration in the DS-CDMA systems in the multi-path environment using uniform linear array[J]. System Engineering and Electronics, 2007, 29(4): 528-531 | |
| Authors: | SHAN Zhi-yong YANG Shi-da ZHOU Xi-lang |
| Abstract: | An algorithm for DOA estimation of signals from multiple mobile users in the CDMA systems in multi-path environment is presented.The algorithm employs code-matched filter and models the inter-symbol interference(ISI) and multiple-access interference(MAI) exactly.The correlation matrices of the received signals after code-matched filtering are employed to estimate the variance of the additive white Gaussian noise,and a novel mathematical problem is created,then a new maximum Likelihood(ML) method based on the strong law of large number can be derived for DOA estimation and array calibration,finally computer simulation proved its effectiveness. |
| Keywords: | CDMA DOA communication system signol processing |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |