qpsk-matlab

Computes Greenwich mean sidereal time from Julian Date

10年全国大学生数学建模全国特等奖的源程序代码大全。(MATLAB)

同态滤波,matlab程序，可利用此程序实现同态滤波 去薄云等功能(Homomorphic filter)

由于卫星与用户接收机二者的连线方向上存在相对运动，因此引起了载波和伪码的多普勒效应，再加上接收机晶体震荡频率漂移和卫星时钟频漂等原因。接收机实际接收到的卫星载波中心频率一般不再等于信号被发射时的标称频率，这就需要接收机在载波频率一维对信号进行搜索。同时，由于卫星到接收机的距离时刻变化，加上接收机始终相对于GPS时间的偏差又并不固定，因而接收信号的伪码相位值也在改变，所以接收机也要在码相位一维对信号进行搜索。扩频信号的捕获是一个对目标信号频率域和相位域进行的二维搜索过程。(Because of the relative motion between the two of the satellite and the user receiver, the Doppler effect of the carrier and pseudo-code is caused, and the frequency drift of the oscillation of the receiver crystal and the frequency drift of the satellite clock are added. The frequency of the satellite carrier center that the receiver actually receives is generally no longer equal to the nominal frequency of the signal being transmitted, which requires the receiver to search the signal in one dimension of the carrier frequency. At the same time, because the distance between the satellite to the receiver is changed, the deviation of the receiver always relative to the GPS time is not fixed, so the pseudo code phase value of the received signal is also changing, so the receiver also searches for the signal in the code phase. The acquisition of spread spectrum signal is a two-dimensional search process for the frequency domain and phase domain of the target signal)

一个简单的元胞自动机程序，用于模拟生命游戏。希望对大家有所帮助(It s good)

一个非常红的画图程序，非常有意思，再此上传下(A very red paint program, very interesting, upload it again next)

里面的有些自适应的程序文件是后来加上去的，有些还调试不成功。但是生成局放信号，对其emd分解，频谱显示，希尔伯特变换，这些都能够实现。效果很好(Inside some files are added later, and some debugging unsuccessful. But PD signal generation, emd decomposition, spectrum display, Hilbert transform, which are able to achieve. Good results)

对8PSK完美建模，其中通过改变码元速率和载波频率，再计算相应的环路滤波器的参数，即可实现多种QPSK模型的解调，且该模型可通过SYSTEM generator进行量化，从而生成ISE能直接使用的HDL代码。(Perfect modeling of 8PSK, wherein by changing the symbol rate and carrier frequency, and calculate the corresponding parameters of the loop filter, to achieve a variety of demodulated QPSK model, and the model can be quantified by SYSTEM generator, thereby generating ISE HDL code can be used directly.)

JPEG图像压缩和解压MATLAB程序，使用了DCT2、线性量化编码、zigzag变换和游程编码理论(JPEG image compression and decompression MATLAB procedures, using DCT2, linear quantization coding, zigzag transform and run-length coding theory)

数学建模中最短路径问题的一些matlab程序(The shortest path problem in mathematical modeling matlab program)