MC-CDMA系统降维盲空时信道估计及信号检测

胡兵; 李平安; 俞卞章

MC-CDMA系统降维盲空时信道估计及信号检测

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出版历程
- 收稿日期: 2004-11-10
- 修回日期: 2005-08-09
- 刊出日期: 2006-08-19

Dimension-Reduced Blind Space-Time Channel Estimation and Signal Detection for MC-CDMA System

摘要

摘要: 该文提出了适用于频率选择性瑞利衰落信道中的MC-CDMA系统降维盲空时信道估计及信号检测算法。对接收数据矢量进行解相关滤波，得到对应于每个用户的无多址干扰(MAI)的降维信号，由白化滤波后的降维数据组成的矩阵的秩1近似来进行盲信道估计。将白化滤波后的降维数据矢量看作是单用户的系统，研究了迭代最小二乘(ILS)检测和最小均方误差(MMSE)检测。仿真结果验证了该文算法的有效性。
- 多载波码分多址;接收天线分集;信道估计;降维
Abstract: Dimension-reduced blind space-time channel estimation and signal detection algorithm for MultiCarrier CDMA (MC-CDMA) system in frequency selective Rayleigh fading channel are presented. A decorrelating filter is applied to the receiving data vectors. The dimension-reduced signal of each user without Multiuser Access Interference (MAI) is got. Blind channel estimation can be performed by the rank-one approximation of whitened dimension-reduced data matrix. Then, the whitened dimension-reduced data vector as a single user model is looked, the Iterative Least Squares (ILS) detection and Minimum Mean Square Error (MMSE) detection are researched. Simulation results show the effectiveness of the proposed algorithms.

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参考文献(1)

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