移动无线信道的模拟与应用

介绍一种利用计算机模拟移动无线通信中信道传输特性的方法．该方法主要对瑞利（Ｒａｙｌｅｉｇｈ）和莱斯（Ｒｉｃｅ）分布的非频率选择性衰落信道进行模拟．运用这种方法，研究了相移键控的调制信号（ＢＰＳＫ，ＱＰＳＫ和８ＰＳＫ）在不同莱斯衰落因子信道中的传输特性，分析了莱斯衰落因子和最大多谱勒频移ｆｄ对衰落裕度（ｆａｄｅｍａｒｇｉｎ）和误码限度（ｅｒｒｏｒｆｌｏｏｒ）的影响．对衰落信号的包络和相位以及二进制序列误码率的统计结果表明：模拟特性与理论分析较好地吻合．

A Simulation for Mobile Radio Channels and Its Applications

A method for computer simulation of the channel propagation characteristics in mobile radio setups is described. It mainly simulates the Rayleigh-distributed and Rice-distributed non-frequency-selective fading channel. With this method are studied the channel propagation characteristics fo BPSK, QPSK and SPSK modulated signals in the channel having different Rice fading factor K. Fading margin and error floor affected by the Rice fading factor K and the maximum Doppler frequency shift fd are analyzed. According to the statistics of envelope and phase distributions of the fading signals and error rate of the binary sequence, close agreement is shown between the simulation and theoretical analysis.