QPSK-DS信号中的扩频序列提取技术，通过以上技术，实现对系统结构的优化。-QPSK-DS spread spectrum signal sequence of extraction technology, through the above technology to realize the optimization of the system architecture.

用频域谱平滑法画的qpsk信号的循环谱及其切片图-Cyclic spectrum and frequency domain spectral slices smoothing painting qpsk signal