一种扩展的SUZUKI移动衰落信道模型的二阶统计特性

Second Order Statistics of an Extended SUZUKI Mobile Fading Channel Model

研究一种扩展的SUZUKI移动衰落信道模型的统计特性,给出该模型包络过程的2个二阶统计量电平交叉率和平均衰落时间的解析式。由于瑞利过程是该模型的特例,因此这些解析式的验证可通过与瑞利过程的结果相比较进行。此外,还采用数值优化方法来检验提出的信道模型同实际轻度和重度衰落信道环境的相符性。最后的理论及计算机仿真结果表明,扩展的SUZUKI移动衰落信道模型具有优异的性能。

The statistics of an extended SUZUKI mobile fading channel model are studied. Closed-form expressions for the second-order statistics of the envelope process for the analytical model, i. e. , the level- crossing rate （LCR） and average duration of fades （ADF） are given. Since the Rayleigh fading channel is a special case of the proposed model, the derived expression can be verified by comparison with results for the Rayleigh fading channel. A numerical optimization procedure has been used to fit the statistics of the proposed analytical model to an equivalent mobile channel for light and heavy shadowing environments. Theoretical and simulation results show that the extended SUZUKI mobile fading channel has excellent performance.