FFT-hanming-blackman

该工程实现对单载波系统QPSK的频偏估计算法。调相信号在接收机相干解调时需要同频同相的参考载波，而发射机和接收机之间往往存在频率偏差，为了消除这种误差，必须在软件层面实现。使用了QPSK四相调制的信号特点进行载波频偏估计，经验证，效果较好。(This project implements frequency offset estimation algorithm for single carrier system QPSK. The phase modulation signal needs the same frequency reference carrier in the coherent demodulation of the receiver, and the frequency deviation often exists between the transmitter and the receiver. In order to eliminate this error, it must be implemented on the software level. The carrier frequency offset estimation is carried out by using the signal characteristics of QPSK four phase modulation.)

说明：  多频移键控，水声通信代码，实现水下通信。。(Multi-frequency shift keying, underwater acoustic communication code, underwater communication)

数模转换芯片和DSP28335的联合开发，其中DAC作为28335的外设进行访问(Digital to analog conversion chip jointly developed and DSP28335, wherein the DAC as 28335 peripheral access)

说明：  zio quel cane porcone

主要是实现调制识别，区分几种常用的数字调制信号。含有两个文件夹 其一为特征参数的仿真；其二为正确识别率的仿真。文件夹key feature simulink中： 运行程序会得到各特征参数之间区分图 从图中可看到特征参数的有效性，见图。 文件夹classification rate simulink中：运行main.m文件 可以得到正确识别率 见图。(It is mainly to realize modulation recognition and distinguish several commonly used digital modulation signals. The simulation of two folders is one of the characteristic parameters, and the second is the simulation of the correct recognition rate. In the folder key feature Simulink: The running program will get the validity of the feature parameters that can be seen from the diagram, as shown in the diagram. Folder classification rate Simulink: running the main.m file can get the correct recognition rate.)

计算超体积测度，方便简单实用，尽请下载...(hypervolume calculator)

说明：  此段代码可以利用matlab实现压限器限幅器的设计，简单易操作，改变其中数值即可实现不同幅度的压限(Use matlab to design pressure limiting device and Limiter)

各向异性ＴＩ介质ｑＰ 反射波走时层析成像.

这是一个图片配准的程序，能找出配准点，输入两张同一物体的照片，程序可找到两张图片中物体的相同点(This is a picture of the registration process, to help identify the registration point, the importation of two photographs of the same object, procedures can be found two photographs of objects in the same spots)

通过霍夫变换，实现延直线上信号的积累，达到提高信噪比的目地，以利于检测。(By Hough transform, the accumulation of signals in the certain straight line, to improve the SNR of the signal.)