多载波CDMA在Rician衰落信道的性能研究

Performance Analysis of Multi carrier CDMA in a Non Selective Rician Fading Channel

在一种同步ＯＦＤＭＣＤＭＡ的系统模型基础上，对频率非选择性Ｒｉｃｉａｎ衰落信道的误码率性能进行了研究，分析和数值结果说明由于多径的存在系统误码率性能迅速下降，而且当直射成分很小时，信道为Ｒａｙｌｅｉｇｈ信道，系统性能变为最差。

Orthogonal frequency division multiplexing (OFDM) is a general technique for data paralled transmission on multiple carriers.One principal advantage of OFDM is its utility for transmission at nearly optimum performance in unequalized channels and in multipath channesl.OFDM CDMA is a new concept that applies the orthogonal multicarrier technique to direct sequence CDMA systems.A synchronous OFDM CDMA model is presented in this paper,and the performance of this system in a non selective Rician fading channel is also evaluated.The numerical results show the system bit error probability degrades rapidly due to multipath component.