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关于采样数据得频谱分析MATLAB事例程序(Sampling data on a spectral analysis program MATLAB examples)

优秀论文及配套源码。Hilbert-Huang变换(HHT)是一种新的非平稳信号处理技术，该方法由经验模态 分解(EMD)与Hilbert谱分析两部分组成。任意的非平稳信号首先经过EMD方法处理后被分解为一系列具有不同特征尺度的数据序列，每一个序列称为一个固有模态函数(IMF)，然后对每个IMF分量进行Hilbert谱分析得到相应分量的Hilbert谱，汇总所有Hilbert谱就得到了原信号的谱图。该方法从本质上讲是对非平稳信号进行平稳化处理，将信号中真实存在的不同尺度波动或趋势逐级分解出来，最终用瞬时频率和能量来表征原信号的频率含量。 本文研究了基于HHT的暂态电能质量扰动检测方法，介绍了HHT的基本原理和利用HHT检测电能质量多扰动信号的实现方法。仿真试验表明该方法可以实时检测扰动的起止时刻，持续时间和扰动幅度，适用于电能质量多扰动的监测和辨识系统。 (Hilbert-Huang Transform(HHT) is a new non-stationary signal processing technology，including the Empirical Mode Decomposition(EMD) and Hilbert spectral analysis．In this method，arbitrary non-stationary signals was divided into a series data sequence with different characteristic scales after the first EMD treatment，each sequence is called an intrinsic mode function(IMF)，and then each IMF component gained corresponding the Hilbert spectrum though Hilbert spectrum analysis，a summary of all Hilbert spectrum assembled to the spectra of the original signal．In essence，this method is a stable processing for non-stationary signal，which decomposed the different fluctuations or trends in the signal in rum，and represented the frequency content of the original signal using the final instantaneous frequency and energy． This paper study a method to detect power quality disturbances based on the HHT，in which the principle and the realization of the HHT and the realization of power quality disturbance)

Chebyshev和Legendre展开(Chebyshev and Legendre expansion)

power_sfavg.rar,功率电子领域matlab仿真文件，已经验证过，程序运行正常(power_sfavg.rar, ,Power electronics field matlab simulation file, has already been verified, the normal operating procedures)

LBP特征提取的MATLAB实现，其getmapping.m定义了lbp三种不同的模式，而lbp.m则是lbp的实现，当然它只是简单的整幅图像的lbp变换（没有分区域），其中很巧妙地运用了整体移动的方法计算lbp值。(LBP feature extraction MATLAB, which getmapping.m defines lbp three different modes, while lbp.m is lbp realize, of course, it simply lbp transform the whole image (no sub-region), which is very clever use of the method of calculating the overall mobile lbp value.)

GSM中GMSK调制信号的产生，给出接收信号眼图及系统仿真误码率，仿真效果非常好。( GSM is GMSK modulation signal generation, The received signal is given eye and BER simulation systems, Simulation of the effect is very good.)

这是雷达动目标检测的matlab实现方法，使用了FFT和FIR两种方法(This is a moving target radar detection matlab implementation methods, the use of FFT and FIR in two ways)

遗传算法求解非线性规划问题的两个MATLAB源程序(Genetic Algorithm for nonlinear programming problems two MATLAB source)

分数阶傅立叶变换，可用于LFM信号的相干源信号的估计(Fractional Fourier Transform can be used for LFM signal of the coherent source signal estimate)

直线阵进场聚焦波束形成算法，三维作图，伪彩图作图(Linear array approach focused beamforming algorithm, three-dimensional mapping, pseudo-color mapping)