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应用科学学报 ›› 2003, Vol. 21 ›› Issue (2): 199-204.

• 论文 • 上一篇    下一篇

空间色噪声CDMA系统的一种基于累积量DOA估计算法

杨维1, 程时昕2   

  1. 1 北方交通大学电子学院 北京 100044;
    2 东南大学移动通信国家重点实验室 江苏 南京 210096
  • 收稿日期:2001-12-16 修回日期:2002-07-16 出版日期:2003-06-10 发布日期:2003-06-10
  • 作者简介:YANG Wei (1964-),male,Beijing,Assoeiate Professor,Doctor;CHENG Shi-xin (1936-),male,Shanghai,Professor
  • 基金资助:
    Project Supported by the State Key Laboratory of Mobile Communications Research,Southeast University (No.105)

A Cumulant -Based DOA Estimation Algorithm for CDMA System in Spatial Colored Noise

YANG Wei1, CHENG Shi-xin2   

  1. 1 School of Electronics and Information Engineering, Northern Jiaotong University, Beijing 100044, China;
    2 National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China
  • Received:2001-12-16 Revised:2002-07-16 Online:2003-06-10 Published:2003-06-10
  • Supported by:
    Project Supported by the State Key Laboratory of Mobile Communications Research,Southeast University (No.105)

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摘要： 传统的DOA估计一般是假设噪声为白高斯的二阶谱估计算法。针对更接近于实际情况的空间色噪声,提出了一种基于累积量MUSIC算法的同步CDMA系统解相干DOA估计算法.该算法不仅能消除多径干扰并且与二阶MUSIC算法相比能更有效抑制空间色噪声,提高估计的准确性。

关键词: 码分多址, DOA估计, 累积量, MUSIC算法

Abstract: The conventional direction of arrival (DOA) detection algorithm is generally based on the second-order spectrum estimation while assuming that the noise is additive white Gaussian noise (AWGN). Concentrating on spatial colored noise of unknown spectrum quality, which is more realistic in any scenario, a novel high-order cumulant MUSIC DOA estimation algorithm for synchronous CDMA system with decorrelator has been proposed. The proposed algorithm not only has the advantages that the DOA of multipath signals can be estimated independently by eliminating all the other resolvable multipath signal interference but while on spatial colored noise case the proposed algorithm estimates DOAs of the decoupled multipath signal more effectively and accurately than the conventional second-order MUSIC algorithm.

Key words: MUSIC algorithm, DOA estimation, cumulant, CDMA

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