多码CDMA系统中一种改进的并行干扰消除算法

International Conference on Neural Networks and Signal Processing, 2003. Proceedings of the 2003 Pub Date : 1900-01-01 DOI:10.1109/ICNNSP.2003.1281177

Junhui Zhao, Yijun Gui, Dongming Wang, X. You

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引用次数: 2

摘要

针对多码CDMA系统，提出了一种改进的基于迭代信道估计的并行干扰消除算法。首先利用导频符号估计信道参数，然后利用接收后数据符号的软信息对信道参数进行细化。并行干扰消除(PIC)适用于第二步的多码干扰(MCI)。仿真结果表明，该方法能显著降低系统的误差层。本文还研究了信道估计质量、PIC消去因子和并行干扰消去数等参数对多码CDMA码误码率(SER)性能的影响。

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Improved parallel interference cancellation algorithm for multicode CDMA system

An improved parallel interference cancellation (PIC) algorithm by iterative channel estimation for multicode CDMA system is proposed in this paper. Channel parameter is firstly estimated with the aid of pilot symbols, and then is refined by using soft information from data symbol after rake receiver. Parallel interference cancellation (PIC) is adapted to multicode interference (MCI) at the second step. Simulation Results show that the error floor of the system can be reduced significantly. The effect of different parameter on the symbol error ratio (SER) performance of the multicode CDMA are also investigated in this paper, such as the quality of channel estimation PIC cancellation factor and the number of parallel interference cancellation.

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International Conference on Neural Networks and Signal Processing, 2003. Proceedings of the 2003

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