thuan

关于spi的串行总线接口编程，实现同步传输(On the spi serial bus interface programming, synchronous transfer)

经验模态分解(Empirical Mode Decomposition, 简称EMD))方法的MATLAB代码(EMD (Empirical Mode Decomposition, referred to as EMD)) ways of MATLAB code)

MATLAB is a software package for doing numerical computation. It was originally designed for solving linear algebra type problems using matrices. It’s name is derived from MATrix LABoratory.

采用simulink设计螺旋交织器，给出了参赛的设置并给出仿真结果(The simulink design spiral interleaver, given the entry settings and simulation results)

现需要在高度为600~700KM范围内，回归周期为30天的太阳同步轨道上布置一颗L波段的合成孔径雷达卫星。 1. 请设计合适的轨道参数，并仿真对应轨道下一个运行周期内星下点轨迹图（纬度和经度两个图）； 2. 计算多普勒中心频率，多普勒调频率与纬度的关系图（设姿态角为0°，天线视角20°~60°，推荐35°）； 3. 按高斯投影方式，将星下点轨迹图投影到地图坐标上。(Now requires a height of 600 ~ 700KM range, return period of 30 days are arranged on a sun-synchronous orbit L-band Synthetic Aperture Radar satellites. 1 Please design the appropriate orbital parameters and simulate the corresponding orbit within the next operating cycle nadir trajectories (latitude and longitude two graphs) 2. Calculate the Doppler center frequency, Doppler frequency and the relationship between latitude Figure (set attitude angle is 0, the antenna angle of 20 to 60, recommended 35) 3 Press Gauss projection, the nadir trajectories projected onto the map coordinates.)

盲源分离中最为经典的不动点算法——FastICA,该算法简单，对初学者有很大的帮助(Blind Source Separation in the most classical fixed-point algorithm- FastICA, the algorithm is simple, for beginners there is a great help)

主要编写的是一个是期类，包括日期的加法，减法，大于符号，小于符号的重载，和一些常用符号的重载，及日期类的一些常见运算(Is mainly written in a period of class, including the date of addition, subtraction, greater than symbol, less than symbols overloaded, and some common signs of overload, and the date of the class some common operations)

该程序可以进行扇形的短扫描重建，利用Parker加权函数。得到不错的重建效果。希望对大家有帮助。仅供参考！(This programme is a short-fan reconstruction.On the use of Parker weight function.I hope it will be useful.And the result of this programme is good.)

matlab的画图的程序使用，数形结合的重要工具，灵活掌握对于matlab开始的学习很重要。(matlab program to use the Paint, The Combination of the important tools, flexibility of learning for matlab start is important.)

Matlab simulink of OFDM 4 QAM