基于互功率谱的时延估计，包括广义互相关函数GCC时延估计，搭建OFDM通信系统的框架，基于分段非线性权重值的Pso算法，使用高阶累积量对MPSK信号进行调制识别，鲁棒性好，性能优越，毕业设计有用。- Based on the time delay estimation of power spectrum, Including the generalized cross-correlation function GCC time delay estimation, Build a fr a mework OFDM communication system, Based on piecewise nonlinear weight value Pso algorithm, Using high-order cumulants of MPSK signal modulation recognition, Robustness, superior performance, Graduation usefu.