基于多径传输和多普勒频移的 瑞利（Rayleigh）信道的仿真 主要考虑不同条件下的仿真-Based on Multi-Drive transmission and Doppler frequency shift of the Rayleigh (Rayleigh) channel simulation main consideration different The simulation conditions

(3) 请用Simulink工具编写代码(S-Function方式)，产生一单径瑞利信道，其多普勒谱为经典谱，其中移动速率为120km/h。并请描述：自己用计算机产生的经典谱是正确的依据。-(3) with Simulink tools to write code (S-Function mode), to produce a single path Rayleigh channel Doppler spectrum is the classical spectrum, in which the