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多普勒频移和多普勒扩展是多普勒效应的重要表现形式,多普勒扩展让信号的带宽向外展宽,严重影响通信的质量和系统的可靠性。本设计首先产生两路高斯白噪声序列,分别送入高斯型FIR滤波器滤波,再经线性内插后构成复序列与输入信号相乘后输出,仿真实现了多普勒扩展。多普勒扩展的实现是多径衰落信道仿真设计的核心环节,为无线通信系统性能的验证提供了很好的仿真和试验环境。
Doppler shift and Doppler spread are important manifestations of Doppler effect. The Doppler spread broadens the bandwidth of the signal and seriously affects the quality of communication and the reliability of the system. The design of the first generation of two Gaussian white noise sequence, respectively, sent to the Gaussian FIR filter, and then linear interpolation after the complex sequence multiplied with the input signal output, simulation Doppler expansion. The implementation of Doppler spread is the core of multi-path fading channel simulation design and provides a good simulation and test environment for the verification of wireless communication system performance.