New-folder-(2)

四步相移法程序和最小二乘法相位解包裹程序，已经验证，此方法比较不错。(Four step phase-shift method program and least squares phase solution package, have validation, this method is good. )

直接序列扩频通信中采用QPSK调制时，须将产生的串行数据首先串并变换成两路，本程序就是实现这种串并变换！(Direct sequence spread spectrum communications using QPSK modulation, it is necessary to have a string of serial data and converted into the first two, the process is to realize such a string, and transform!)

采用matlab读取avi文件中各帧的图像。(Avi file using matlab to read each frame image.)

GPS信号捕获程序,采用串行搜索算法,并自带三段中频采样的数据.(GPS signal acquisition procedures, using serial search algorithm, and bring their own copies of the three IF sampling data. )

基于ti f28035实现的感应电机无速度矢量控制，磁链观测为电流-电压模型，开发平台ccs3.3(Implemented as induction machine sensorless vector control,flux observe model is current-voltage model,compiled by ccs3.3)

说明：  对移动通信中的多径多普勒频移进行详细的仿真,对学习这个的朋友有极大的帮助(The detailed simulation of multi-path Doppler frequency shift in mobile communication will be of great help to the friends who study this problem.)

对OFDM运用的QPSK的调制与解调，其中包括星座图，误码率的仿真(Use of OFDM QPSK modulation and demodulation, including constellation, BER simulation)

图像角点提取－harris，以及非最大抑制等，并有其他角点检测代码(Image Corner Detection-harris, as well as non-maximal inhibition, and has other corner detection code)

说明：  MATLAB下实现的GPS软件接收机程序,从数字中频到最后的定位结果都有,中间很多算法是很好的参考资料,对学习GPS有很大帮助.(a software-defined gps and galileo receiver)

双音多频 DTMF（Dual Tone Multi Frequency），双音多频，由高频群和低频群组成，高低频群各包含4个频率。(Dual-tone multi-frequency signaling (DTMF) is used for telecommunication signaling over analog telephone lines in the voice-frequency band between telephone handsets and other communications devices and the switching center. The version of DTMF that is used in push-button telephones for tone dialing is known as Touch-Tone. It was developed by Western Electric and first used by the Bell System in commerce, using that name as a registered trademark. DTMF is standardized by ITU-T Recommendation Q.23. It is also known in the UK as MF4.)