ofdm系统仿真 含16qam调制 fft 加窗 加cp等模块，基于chebyshev的水声信号分析，计算多重分形非趋势波动分析matlab程序。- ofdm system simulation including 16qam modulation fft windowing modules plus cp, Based chebyshev underwater acoustic signal analysis, Calculation multifractal detrended fluctu