KD树算法 kd buildtree

用布莱克曼窗设计数字带通滤波器,讲解了窗函数的基本原理，设计的过程等(The Blackman window design digital band-pass filter, to explain the basic principles of the window function, design process)

Spectral estimation（谱估计）的目标是基于一个有限的数据集合描述一个信号的功 率（在频率上的）分布。功率谱估计在很多场合下都是有用的，包括对宽带噪声湮没下的信 号的检测(Spectral estimation)

matlab 遗传算法工具箱，就这么简单非要20字(matlab genetic algorithm toolbox, so simple insisted 20th)

说明：  利用矩阵重构，在小样本下，实现了比常规MUSIC更高的分辨精度(Use of matrix remodeling, in small sample situation, implementation than conventional MUSIC higher resolution )

该matlab函数用来计算理想无耗传输线上电压电流的分布，用户需要给定传输线的特性阻抗、电长度以及出事端的反射系数。(Matlab function used to calculate the ideal power transmission lines without the distribution of voltage and current, users need to set the characteristic impedance of transmission lines, electricity, as well as the length of the reflection coefficient of trouble.)

it is example4 of capture4 from widrow book. it is so good for learning many things.

压缩感知的贪婪迭代算法，算法使用最小二乘估计来重构信号(Greedy iterative algorithm compressed sensing algorithms to reconstruct the signal using a least squares estimation)

说明：  归一化随机共振代码，亲测有用，需要的自己拿(Normalized Stochastic Resonance Code)

ASK,FSK,PSK信号调制及用FFT法进行频率估计(ASK signal modulation and the FFT algorithm with frequency estimation)

《射频电路设计——理论与应用》一书课课后习题第一章Matlab程序代码("RF circuit design-- Theory and Application," a book first lesson after lesson Exercises Chapter Matlab code)