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对NRZ.DPSK信号用matlab进行性能仿真和实现，大家可参考下(simulate and realize NRZ. DPSK signal with matlab, you can reference)

Implement the following as inlines.

Returns the periodogram of a given signal using the FFT

FIR 及 IIR低通滤波器的设计以及 正弦信号滤波前后的频谱分析 （不同窗函数截断）(FIR and IIR filter design and low-pass filter before and after sinusoidal signal spectrum analysis (different window function truncated))

说明：  直接扩频源码，超级有用的哦，呵呵,一定要顶啊。哈哈(spread，very good)

匹配小波的算法仿真。对原始信号进行匹配小波分解后再进行重构，从图中可以看出消噪性能优越。(It s a simulation of match wavelet algorithm. The primitive signal is decomposed by match wavelet and then reconstructed.It is can be seen from the figure that the method has a good denoise performance.)

说明：  finds polynomials using spline algorithm

image 2d enchancement using redundant discrete wavelet algorithm

说明：  带有收缩因子和惯性权重的基本PSO粒子群算法源代码。本源代码模块化编写，结构清晰，便于改进和做数值实验(With contraction factor and inertia weight PSO basic particle swarm algorithm source code. Source code modular preparation, structure, clear, easy to improve and to do numerical experiments)

说明：  前辈门的报告和自己的程序，吴镇扬老师的那本DSP上所有的实验matlab源码和问答题目的解答(The report and its predecessors door procedure, Zhen-Yang Wu teachers that all the experiments the DSP matlab source code and answers to quiz questions)