dct_dwt_transform

matlab的一些基础程序，可直接调用。收集很久的！(matlab some of the basis of procedures, can be directly called. Collection of long!)

最佳离散信号及其设计在现代通信、雷达、声纳、制导以及信号处理、空间测控等领域中，扮演着越来越重要的角色。因此，深入研究最佳离散信号，具有重要的理论意义和应用意义。本代码在研究二值自相关二进阵列偶的理论基础上，设计了其搜索算法。(The best discrete signal and its design in the field of modern communications, radar, sonar, guidance and signal processing, spatial measurement and control plays an increasingly important role. Therefore, in-depth study the best discrete signal has important theoretical and practical significance. The code in the study binary binary array pairs based on the theory, design its search algorithm.)

总结了五中时频分析方法（STFT,Gabor,WVD,PWVD,SPWVD）,并对个别方法进行了对比。每条程序都有详细的说明(Fifth summarized time-frequency analysis method (STFT, Gabor, WVD, PWVD, SPWVD), and the individual methods were compared. Each program has a detailed description)

说明：  修正BBO晶体折射率色散公式中错误的系数 ，完成βBBO晶体Ⅱ类匹配的SPDC（共线情况）并计算相位匹配角。此时的相位匹配角为能 产生纠缠光子对的最小切割角。另附一份参考文献，详细的说明此类实验的步骤与细节。(Correct the wrong coefficient in the refractive index dispersion formula of BBO crystal, complete the type II matching SPDC of BBO crystal and calculate the phase matching angle. The phase matching angle is the minimum cutting angle that can produce entangled photon pairs. In addition, a reference is attached to explain the steps and details of such experiments in detail.)

一本介绍matlab的书籍，由西安交通大学李人厚编著(An introductory books matlab, from Xi an Jiaotong University, edited by Li Renhou)

分数阶傅立叶变换的示例程序，个人成果，仅供参考(Fractional Fourier transform of the sample program, individual results, for reference only)

实现雷达的测速和测距，并观测雷达的多普勒效应(Achieve moving target radar speed and ranging, and realize the moving target of the Doppler effect)

a code that converts decimal to bcd

一个关于数字图像处理中角点提取的程序，使用harris算法，效果还不错。(On digital image processing in the corner extraction process, the use of harris algorithm, the effect was not bad.)

Compute symmetric trapezoid region based on its sides and height length.