说明：  计算OFDM信号的峰值旁瓣电平（PSL）以及隔离度（I）的程序，改变信号形式可以得到任意波形的PSL和I。
(Calculate the peak sidelobe level (PSL), as well as the isolation of the OFDM signal (I) procedure, to change the signal form of arbitrary waveform PSL and I can be.)