说明：  该程序主要实现CHIRP信号频偏估计中的频偏对通信系统的影响描述，由于频偏，使得匹配后的脉冲偏移参考点。
(The program mainly realize the CHIRP signal frequency estimation of frequency deviation effect on communication system, due to the frequency offset, so that when the matching of the pulse offset reference point. )