| A new method to estimate DOA in CDMA system in multi-path environment |
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| 作者姓名： | 单志勇 周希朗 张琪 |
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| 作者单位： | [1]College of Information Science and Technology, Donghua University, Shanghai 200051, China [2]Department of Electronic Engineering, Shanghai Jiaotong University, Shanghai 200030, China |
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| 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.
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| 关 键 词： | DOA CDMA 通信系统 滤波器 代码匹配 |
| 文章编号： | 1005-9784（2006）03-0270-05 |
| 收稿时间： | 2005-07-10 |
| 修稿时间： | 2005-08-25 |
A new method to estimate DOA in CDMA system in multi-path environment |
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| Shan Zhi-yong , Zhou Xi-lang and Zhang Qi.A new method to estimate DOA in CDMA system in multi-path environment[J].Journal of Central South University of Technology,2006,13(3):270-274. |
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| Authors: | Shan Zhi-yong Zhou Xi-lang and Zhang Qi |
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| Affiliation: | (1) College of Information Science and Technology, Donghua University, 200051 Shanghai, China;(2) Department of Electronic Engineering, Shanghai Jiaotong University, 200030 Shanghai, China |
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| Abstract: | 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. |
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| Keywords: | DOA CDMA multi-path code-matched filter |
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