report_FFT_2010_10_31

说明：  mimo下行基于块对角化信道逆转的多用户预编码程序。(mimo downlink multi-user precoding based on block diagonalization channel inversion)

基于MATLAB的图形降噪,典型的BMP图像文件由三部分组成,位图文件头数据结构(Image denoising base on matlab,we selected the criteria image of Lena, add Gaussian noise and impulse noise with different strength)

基于AR参数模型的功率谱代码仿真及其结果(Based on the result of the power spectrum of the AR parameter model code emulation)

matlab中的psat软件可以用于潮流计算，连续潮流计算，小扰动分析，分岔分析等等，这是三个版本的说明书(psat matlab software can be used in the flow calculation, continuous flow calculation, the small perturbation analysis, bifurcation analysis, etc., which are the three versions of the manual)

Lloyd max algorithm using the signal itself

MATLAB application of the Fourier transform

该源码是针对一篇避免过度分割提出的一种新的分水岭算法，具体matlab源码，针对各个步骤都给出了具体分析，个人觉得对学习图像分割的有帮助。(The source is to avoid over-segmentation for a proposed a new watershed algorithm matlab source code specific for each step are given a specific analysis, personal feel to learn image segmentation help.)

一个matlab手势识别demo，可通过训练，识别剪刀石头布的手势。(A gesture recognition matlab demo, through training, to identify Rock Paper Scissors gesture.)

第一步是计算输人信号单边功率谱密度（ESD）。使用快 ％速傅里叶（FFr）算法将信号从时域转换到频域。因为FFr算法的输出是离散谱，而这 ％里我们需要的是连续谱，因此需要引人不同的比例因子来实现从离散谱到连续谱的转换。 ％在第二步中，我们利用迭代算法计算出相对于特定阂值的ESD的最高和最低频率，从而 ％估算出被检测信号所占用的带宽。这种算法同时适用于基带信号和已调制信号。最后， ％在第三步中，我们给出了输出图形的原代码。(The first step is calculating the input signal unilateral power spectral density (ESD). The use of fast Fourier speed (FFr) algorithm for the signal conversion from time domain to frequency domain. FFR algorithm because the output is a discrete spectrum, which we need is a continuous spectrum, so the need for food of different scale factor to achieve from the discrete spectrum to continuous spectrum conversion. In the second step, we use iterative algorithm to calculate a specific threshold in relation to the ESD of the highest and lowest frequency, thus estimated to be occupied by the signal detection bandwidth. This algorithm applies to both baseband signal and modulation signals. Finally, in the third step, we give the graphical output of the original code.)

将1HZ的正弦波与5HZ的正弦波相加后进行傅里叶分析。(To be a 1 HZ ac sine wave and 5 HZ ac added sine wave after the Fourier analysis. )