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《数字信号处理》（程佩青第3版）课后实验程序第3章第1题实验(" Digital Signal Processing" (Cheng Peiqing version 3) after-school programs Chapter 3 Experiment 1 Experiment title)

合成孔径雷达成像系统点目标仿真matlab 3点 (Synthetic aperture radar imaging system point target simulation matlab 3 points)

说明：  灰色理论认为系统的行为现象尽管是朦胧的，数据是复杂的，但它毕竟是有序的，是有整体功能的。灰数的生成，就是从杂乱中寻找出规律。同时，灰色理论建立的是生成数据模型，不是原始数据模型，因此，灰色预测的数据是通过生成数据的gm(1,1)模型所得到的预测值的逆处理结果。 此程序用来作灰色预测。 (Gray theory that the behavior of the system even though the phenomenon is dim, the data are complex, but it is after all, is orderly, there is a whole function. Gray number generation, that is, from the clutter to find out the laws. At the same time, the gray theory is to generate data model, rather than the original data model, therefore, gray forecast data to generate data through the gm (1,1) model by the inverse of the predictive value of the results. This procedure is used for gray prediction.)

求取一幅灰度图像中的光斑形心的位置的Matlab的源代码。算法使用的是最大类间方差法编写的程序，可以得到光斑形心位置的（x,y）坐标。(strike a gray image of the heart-shaped spot on the location of the source code Matlab. The algorithm used is MBV Law prepared by the procedures, can be heart-shaped spot position (x, y) coordinates.)

Speech Recognition using MEL cepstral Coefficients

Quadrature amplitude modulation (QAM) is both an analog and a digital modulation scheme. It conveys two analog message signals, or two digital bit streams, by changing (modulating) the amplitudes of two carrier waves, using the amplitude-shift keying (ASK) digital modulation scheme or amplitude modulation (AM) analog modulation scheme.

一个matlab写的双线性内插的程序，欢迎下载。(Matlab write bilinear interpolation procedures, welcome to download.)

可以产生正弦信号和白噪声时域信号波形，以及混杂噪声的正弦波波形，信噪比可调(the sinusoidal signal can be generated when the white noise domain waveform, sinusoidal waveform, and the noise mixed SNR adjustable)

说明：  用于水利行业的河流泥沙的双值挟沙力的计算(For the water industry, the double value of the river sediment calculation of sediment-carrying capacity)

74161实习十进制计数功能，有预置端和清零端(Decimal count )