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关于数字中频接收机的MATLAB仿真代码，下变频采用cordic算法，并经过三级抽取、滤波处理。调试通过可运行(This code is about digital IF receiver on MATLAB simulation.downconvert using cordic algorithm, and after three extraction, filtering process. You can run debugging)

一种认知无线电网络中的新型主动频谱选择算法，这篇文章提出的算法比较新颖(A cognitive radio network in the new active spectrum selection algorithm, the proposed algorithm of this relatively new article)

本程序将一随机信号通过瑞利信道产生输出，并用Jakes方法产生单径的符合瑞利分布的复随机过程(This procedure will be a randomly generates an output signal through Rayleigh channel, and use Jakes method produces single-path Rayleigh distribution meet the complex stochastic process)

区域生长算法，一种传统的图像分割算法，用于图像分割。(region growing algorithm for image segmentation .it is a trditional image segmentatin algorithm.)

计算SENSE重建图像中的g-factor,这是并行磁共振成像SENSE算法的关键一步(G-factor is the metric to quantify the amplificaiton of noise power in reconstructing SENSE accelerated image. The detail was presented in Pruessmann s 1999 Magn. Reson. Med. paper. In theory, g-factor is the pixel-by-pixel ratio of the image variance between the SENSE reconstructed image and un-accelerated image. And g-factor depends on: (1) the k-space data trajectory (2) coil sensitivit profiles (3) noise covariance matrix of the array coil)

多用户OFDM系统的子载波分配算法参考论文(Subcarrier allocation algorithm for multi-user OFDM system)

利用Matlab软件编程实现DDS（直接数字频率合成技术）。设时钟的频率为固定值f_C，在CLK的作用下，如果按照0000,0001,0010，…，1111的地址顺序读出ROM中的数据，即表1中的幅值编码，其正弦信号频率为f_01；如果每隔一个地址读一次数据（即按0000,0001,0100，…，1110顺序），其输出信号频率为f_02，且f_02将比f_01提高一倍，即f_02=2f_01；其余类推。这样，就可以实现直接数字频率合成器的输出频率的调节。(Matlab software programming DDS (direct digital frequency synthesis). Clock frequency set to a fixed value f_C, under the effect of CLK, according to 0000,, ..., 1111 of the sequence of addresses in the ROM reads the data, i.e., the amplitude of the encoding in Table 1, the frequency of the sinusoidal signal f_01 if every time a read address data (ie 0000,0001,0100, ..., the order of 1110), the output signal frequency is f_02, and f_02 f_01 than doubled, i.e. f_02 = 2f_01 rest on. This allows direct digital frequency synthesizer output frequency regulation.)

matlab说明书，对于matlab编程工作者及其有用，是一本有用的工具书(matlab manuals for workers and their useful matlab programming is a useful tool)

硬件开发磁光效应与声光效应Hardware development magneto-optical effect and sound and light effects(Hardware development magneto-optical effect and sonoluminescence Hardware development magneto-optical effect and sound and light effects)

Program for genetic algorithm. Simple cross algorithm