stft_test

利用matlab来模拟正弦振幅型光栅，并附有图说明模拟效果(Using matlab to simulate sinusoidal amplitude grating, together with the map shows simulation results)

Campbell figure is very good method in solving nonlinear dynamics(this code gives a good approximation method to get Campbell figure)

说明：  基于MATLAB软件的交流永磁同步电机调速系统研究 介绍了一种采用磁场定向理论控制交流永磁同步电机的调速系统，应用现代控制理论对 电机直交轴耦合分量进行了解耦，并利用经典控制理论设计了电流环和角速度环调节器。MATLAB 仿真 结果证明了该方法的有效性，但系统调试时仍需根据具体情况适当调整以得到更理想的效果。(MATLAB software based on the exchange of permanent magnet synchronous motor speed control system introduces a theory of the use of field-oriented control of AC permanent magnet synchronous motor speed control system, the application of modern control theory on DC motor shaft coupling the decoupling components and to make use of classical control Theoretical Design of a current loop and the angular velocity of ring modulator. MATLAB simulation results prove the effectiveness of the method, but the system still need to debug when appropriate adjustments in accordance with specific circumstances in order to obtain better results.)

说明：  录制一段个人的语音信号，并对录制的信号进行采样；画出采样后语音信号的时域波形和频谱图；给定滤波器的性能指标，采用双线性变换法和窗函数法设计滤波器，并画出滤波器的频率响应；然后用自己设计的滤波器对采集的信号进行滤波，画出滤波后信号的时域波形和频谱，并对滤波前后的信号进行对比，分析信号的变化；回放语音信号；最后，设计一个信号处理系统界面。(Record a personal voice signal, and recording the signal is sampled draw sampled speech signal time-domain waveform and frequency spectrum for a given filter performance, the bilinear transformation and design of filter window functions and draw the frequency response filter then filter of their own design collection of the signal filtering, to draw the filtered signal in time domain waveforms and frequency spectrum, and filtering the signal before and after comparison, analysis of signal changes playback audio signals Finally, a signal processing system interface design.)

压缩感知的差分量化,此代码是基于块的压缩感知量化，减少了bit率，对压缩感知的量化有起步作用。(compressed sending ，bcs-spl-dpcm)

仿真研究了MIMO雷达发射波束图和波形相关程度的关系。波形相关程度越高发射波束图越窄，发射能量越集中；波形相关程度越小，发射波束图越平坦，发射能量在空域分布越均匀。(Relation between Degree of correlation of waveform and transmitting beampattern. Hign correlation of waveforms corresponding to concentrated transmitting energy; Low correlation of waveforms corresponding to concentrated evenly distributed transmitting energy.)

认知无线网络学习代码,主要从性干噪比和功率的优化功率控制(Cognitive learning code wireless network)

This document is aimed primarily for postgraduates and project students who are interested in using MATLAB in the course of their work

papers based on distributed arithmetic.

Isomap通过“改造一种原本适用于欧氏空间的算法”，达到了“将流形映射到一个欧氏空间”的目的。(Isomap achieved the goal of "mapping manifolds to an Euclidean space" by "reforming an algorithm that was originally suitable for Euclidean space".)