绘制时域波形以及BSPK波形，从而进一步理解BPSK系统的调制和解调原理、抗噪性能分析。-Draw time-domain waveform and the BSPK waveform, thereby further understanding of the BPSK modulation and demodulation principle, analysis of anti-noise performance.

产生生周期为7的m序列,直接扩频二相相移键控，时域波形和频谱(Generating m sequence with a lifetime of 7, direct spread spectrum two phase shift keying, time domain waveform and spectrum)