根据软件无线电的思想，提出了一种新颖的数字信号处理算法，对QPSK信号的相位进行数字化处理，从而实现对QPSK信号的解调.该算法允许收发两端载波存在频差，用数字锁相实现收发端载波的同步，在频偏较大的情况下，估算频偏的大小，自适应设置环路的带宽，实现较短的捕获时间和较好的信噪性能。整个设计基于XILINX公司的ISE开发平台，并用Virtex-II系列FPGA实现。用FPGA实现调制解调器具有体积小、功耗低、集成度高、可软件升级、扰干扰能力强的特点，符合未来通信技术发展的方向。-According

Modern signal processing used in the spectral estimation in matlab, Complete HMM-based speech recognition system, A noise auxiliary data analysis method.

Genetic algorithm based reactive power optimization, ML estimation method can be a good signal to noise ratio, Calculation of the Euclidean distance between the two matrices.

Space target recognition algorithm using PM, ML estimation method can be a good signal to noise ratio, In matlab R2009b debugging through.