ywalker

AV_TH program used in the denoising muticopie transformed images via wavelet

text classifier to classify some text file

calculation of gaussian filter

《MATLAB神经网络30个案例分析》中的第19个例子，案例19 概率神经网络的分类预测-基于PNN变压器故障诊断。希望对大家有一定的帮助！(The MATLAB neural network analysis of 30 cases of 19 example, 19 cases of probabilistic neural network classification prediction based on PNN transformer fault diagnosis. Hope to have certain help to everybody! )

BER verses SNR in ofdm with amplifier: The BER performances of OFDM systems over the AWGN channel are given by the BER where N=512. We see that SNR required for BER=10-3 No channel coding scheme is adopted. Therefore, BER is a bit higher. The results with 16 QAM show that the required Signal to Noise Ratio (SNR) for BER=10-2 is almost the same. This is because the noise is the dominant.

这是关于matlab应用相关的文章，一些基本函数用法，以及相关的内容延伸，工具箱之类(This is about matlab application-related books, some of the basic functions usage, as well as related content extends toolbox like)

生成伪随机序列调相的回波信号的速度模糊函数(generate M sequence echo signal s ambigures function)

细化算法，对图像转化二值图像后，对高亮部分细化之几个像素，适用于道路提取，某物体骨架提取，线路提取等领域(After the image is transformed to two value images, a few pixels of the highlighting part are applied to the extraction of road, the extraction of an object skeleton, the extraction of line and so on.)

说明：  2. 关于无线信道的多普勒谱，请回答以下问题： (1) 在某些无线信道中，多普勒频移会引起无线信道输出信号的混叠。请描述产生混叠的各种原因； (2) 无线信道中的多普勒谱有一种经典谱(classic spectrum)，请解释产生这种谱形状的机理； (3) 请用Simulink工具编写代码(S-Function方式)，产生一单径瑞利信道，其多普勒谱为经典谱，其中移动速率为120km/h。并请描述：自己用计算机产生的经典谱是正确的依据。(2. Regarding the doppler spectrum of the wireless channel, please answer the following questions: (1) in some wireless channels, doppler frequency shift will cause aliasing of the output signals of the wireless channel.Describe the various causes of aliasing; (2) there is a classic spectrum in the doppler spectrum in the wireless channel, please explain the mechanism of producing this spectrum shape; (3) please use Simulink tool to write code (s-function mode) to generate a single-path Rayleigh channel, whose doppler spectrum is the classical spectrum, in which the moving rate is 120km/h.And please describe: your own computer generated classical spectrum is the correct basis.)

对于初学者具有参考意义，有较好的参考价值，包含特征值与特征向量的提取、训练样本以及最后的识别，表示出两帧图像间各个像素点的相对情况，对HARQ系统的吞吐量分析，多目标跟踪的粒子滤波器。