半带滤波器是FIR滤波器的特殊情况，在软件无线电的变速率采样中有着广泛的应用，-Half-band FIR filter filters are special circumstances in the software radio has a variable-rate sampling of a wide range of applications,

一个OFDM 基带信号，采用256点IFFT,子载波采用8PSK映射,加保护段，调制信号采用“削顶”方法降低PAPR,FIR 半带滤波，最后输出时域信号/频域响应。包含各级的视频域比较-An OFDM baseband signal, using the 256-point IFFT, the sub-carrier using 8PSK mapping, plus the protection section, the modulated signal " cut top"