isodata_complet_et_k-means

Astrodynamics library file crack

one pso program, it is easy to use (one pso program, it is easy to use)

This is a matlab code for segmentation part of the automatic number plate detection.

基于OFDM技术的无线局域网系统设计，要求按照IEEE802.11a协议的要求，使用Simulink构建发送端和接收端。首先在高斯噪声信道的要求下，产生它特有的帧格式。(OFDM-based wireless LAN system design technology requirements in accordance with the requirements of IEEE802.11a protocol, using Simulink to build the transmitter and receiver. First, at the request of the Gaussian noise channel, resulting in its unique frame format.)

研究表明超高斯分布更加贴近语音信号的实际分布，然而语音信号很难用单一的概率密度 函数准确描述，针对这一情况，提出了一种用超高斯混合模型对语音信号幅度谱建模的新方法，并推导了 基于此模型的幅度谱最小均方误差估的估计式。仿真结果表明：与传统的短时谱估计算法相比，该算法不 仅能够进一步提高增强语音的信噪比，而且可以有效减小增强语音的失真度，提高增强语音的主观感知 质量。 (Recent research indicates that the speech spectral amplitude distributions could be fairly described with super-Gaussian probability density function. However, the complexity of speech signal determines that the distribution statistics ofspeech signal could not be well described by single simple function. Thus a super-Gaussian mixture model for speech spectral amplitude is proposed, and with this model, a minimum mean-square error (MMSE) estimator for speech signals spectral amplitude is derived. The simulation results show that this algorithm based on Gaussian and super-Gaussian speech model could achieve better noise suppression and lower speech distortion as compared with the conventional short-time spectral amplitude estimation algorithm. )

这是一个非常好的关于OFDM的英文文章，它是国外的博士论文，对于想了解整个OFDM的朋友来说，可以了解到许多中文文章所没有的知识。(This is a very good article in English on OFDM, which is the doctoral thesis abroad, who want to understand the overall OFDM' s friends, you can understand that many Chinese do not have knowledge of the article.)

利用网络实现函数逼近 使用的主要函数如下： NEWRB——设计径向基函数神经网络 SIM——对径向基函数网络进行仿真(Function approximation using the Internet to achieve the main function is as follows: NEWRB- the design of radial basis function neural network SIM- for radial basis function network simulation)

说明：  matlab信号调制与解调方面的书 我自己看了一遍 感觉还不错(matlab signal modulation and demodulation aspects of the book I read it again I feel pretty good)

利用matlab程序生成史密斯圆图，供微波工程人员进行参考。(Matlab program to generate a Smith chart for microwave engineering staff for reference.)

说明：  回波数据进行二位FFT处理结果和CFAR处理后结果对比(Comparison of the results of two-bit FFT and CFAR processing for echo data)