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一种基于小波变换的灰度数字水印嵌入算法,使用matlab实现，含有原始论文。不过不是很理想，希望大家改进(Gray-scale based on wavelet transform digital watermark embedding algorithm, using matlab implementation, containing the original papers. But not very good, hope that we improve the)

自己编写的QPSK调制与解调，内含matlab-figure-file、matlab-M-file和得出的jpg格式图形！(I have written QPSK modulation and demodulation, containing matlab-figure-file, matlab-M-file and come to the jpg format graphics!)

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说明：  基于MATLAB的FM调制课程设计与源程序(MATLAB-based curriculum design of the FM modulation and source)

JSON library SimpleJSON

数字基带系统将数字信号从时域上看时数字滚降，需要画出滚降前后的波形展示出来。频域上带宽变化了。输入滤波器之前的波形与采样判决之后的波形。采样判决前的频谱。 采样判决后的码型。 2、眼图（采样判决之前的眼图）（信噪比大眼图清晰） 3、误码曲线，（横坐标时信噪比，纵坐标时误码率） 4、Arfa变化对误码特性的影响，变好还是变差(变好)，眼图清晰度变化（清晰），传递函数的带宽的变化。（带宽越大）(1.Digital baseband system point of view the digital signal from the time domain when the number of roll-off, you need to draw the waveform displayed before and after the roll-out. The frequency domain, the bandwidth change. Input filter and sample ruling before the wave after wave. Sample pre-judgment spectrum. Sampling pattern after the verdict. 2, the eye diagram (eye before sampling decision) (SNR big eye clear) 3, the error curve (abscissa when the signal to noise ratio, bit error rate when the vertical axis) 4, Arfa impact of change on BER performance, get better or worse (getting better), change of eye-definition (clarity), the transfer function of the bandwidth changes. (The greater the bandwidth))

这是一个MATLAB仿真文件，旨在对试验图像进行分水岭变换处理。(This is a MATLAB document, which seeks to test the watershed transform image processing.)

说明：  通过实验，熟悉Matlab编程环境，学习Matlab的基本使用方法，包括基本的数学运算、图形绘制和编写m文件仿真及使用帮助命令等。(Through the experiment, familiar with the Matlab programming environment, learning the basic use of Matlab, including basic mathematical calculations, graphics rendering and the preparation of m documents and the use of simulation to help orders.)

说明：  a complete program for calculating of energy of H2 and He by monte carlo simulation

掺5 MgO的PPLN晶体温度调谐曲线，泵浦光1064nm，周期为29.5,30,30.5,31,31.5um(5 MgO doped PPLN crystal temperature tuning curve of the pump laser 1064nm, period 29.5,30,30.5,31,31.5um)