时变信道的频率选择性和时变性。系统的输入是一个BPSK信号。系统的时变特性使BPSK信号作为时间的函数，发生衰减和相位旋转。-Time-varying channel frequency selectivity and time variability. Input to the system is a BPSK signal. System is time-varying characteristics make BPSK signal as a function of time, the o

该书描述了在DSP上如何用C语言实现数字信号处理，详细介绍了采样定律、非时变系统、C语言实现等-The book describes how the DSP digital signal processing using C language, detailing the sampling theorem, time-invariant systems, C language, etc.