feixianxing

扩展的交互多模型在目标跟踪方面的应用，用来估计一维的目标加速度，并不时的改变转移矩阵(Interacting multiple model)

输入x,y的值，并将它们的值互换后输出。(Enter the x, y values​ ​ , and their values ​ ​ are interchangeable output.)

This program simulates the bit-error-rate (BER) performance of OSTBC with L=4 antennas over the frequency flat Rayleigh block fading channel The code is developed for real orthogonal design, code rate 1/2 modulation- 16 QAM with gray coding resulting in 2 bits/sec/Hz.(This program simulates the bit-error-rate (BER) performance of OSTBC with L = 4 antennas over the frequency flat Rayleigh block fading channel The code is developed for real orthogonal design, code rate 1/2 modulation-16 QAM with gray coding resulting in 2 bits/sec/Hz.)

说明：  二维双凹激光振荡，采用菲涅尔衍射和fox-li方法，得到两维幅度和相位输出。考虑镜面倾斜的情况。(Two-dimensional double-concave laser oscillation, using Fresnel diffraction and the method of fox-li, the two-dimensional amplitude and phase output. Consider the case of mirror tilt.)

说明：  根据签名骨架和二值签名，提取了签名图像的笔划宽度直方图。(extracte the stroke width historgram of signature images)

从其他网站下载的经典蚁群算法，对初学者非常有用，请看看。(downloaded from other websites of the classic ant algorithm, very useful for beginners, please look at.)

耳蜗实质上相当于一个滤波器组，耳蜗的滤波作用是在对数频率尺度上进行的，在1000HZ下，人耳的感知能力与频率成线性关系；而在1000HZ以上，人耳的感知能力与频率不构成线性关系，而更偏向于对数关系，这就使得人耳对低频信号比高频信号更敏感。Mel频率的提出是为了方便人耳对不同频率语音的感知特性的研究。频率与Mel频率的转换公式为(Cochlear substantially equivalent to a filter set, cochlear filter is used on logarithm frequency scale, under the 1000 hz, the perception of the human ear and a linear relationship with frequency In more than 1000 hz, the perception of the human ear does not constitute a linear relationship with frequency, and prefer to logarithmic relationship, which makes the human ear is sensitive to low frequency signal is better than high frequency signal. Mel frequency is put forward in order to facilitate the ear of the study of speech perception characteristics of different frequency. For frequency and Mel frequency conversion formula )

Matlab之插值法，包括线性插值，等等(Matlab of the interpolation method, there are close to point interpolation)

这是《Space-Time Codes and MIMO Systems》书中第二章的源程序，包括mimo信道模型，遍历容量，中断容量以及发射端或接受端具有相关性等程序。(This is the " Space-Time Codes and MIMO Systems" source book, the second chapter, including mimo channel model, ergodic capacity, the outage capacity and the transmission side or the receiving end of relevant procedures.)

小波包分解并能提取特征频段能量的完整的matlab程序(The wavelet packet decomposes and can extract the full matlab program of feature frequency energy)