jiasudu

自然梯度算法，一个不错的梯度算法，Matlab学习的一个好的程序(The natural gradient algorithm, a good gradient algorithm, Matlab program to learn a good)

摘要:正交频分复用(OFDM)是第四代移动通信的核心技术。该文首先简要介绍了OFDM基本原理,重点研究了理想同步情 况下,保护时隙(CP)和不同的信道估计方法在高斯信道和多径瑞利衰落信道下对OFDM系统性能的影响。在给出OFDM系 统模型的基础上,用MATLAB语言实现了整个系统的计算机仿真并给出参考设计程序。最后给出在不同的信道条件下,保 护时隙、信道估计方法对OFDM系统误码率影响的比较曲线,得出了较理想的结论。 (O FDM is the key techno logy of 4G in the field of mobile comm unication.In this article O FDM ba sic p rinc ip le is briefly in troduced.Then,the influence of CP and d iffe rent channe l e stim a tion on the system pe rfo rm ance is emp ha tica lly analyzed respectively in Gauss and R ayle igh fading channe ls in the cond ition of ideal synchronization.B e sides,based on the given system mode l O FDM system is compu te r sim u la ted w ith MA TLAB language and the refe rentia l design p rocedure is given.Fina lly,the B ER cu rves of CP and channe l e stim ation a re given and comp ared.The conclusion is sa tisfac to ry. )

用矩量法计算天线辐射特性的MATLAB演示程序，程序很紧凑，执行效率很高(Moment method antenna radiation characteristics of MATLAB demonstration program, the program is very compact, high efficiency in the implementation)

这是用matlab编写的一个源程序，希望对大家有用，不足之处还请大家谅解(This is a source code written in matlab, want to be useful, the inadequacies also please understand)

该模型为十二脉波整流系统环流问题研究matlab仿真模型，研究环流问题的果断收藏了吧(matlab models of transformer)

在这个例子中，我们对有三条固定路径的AWGN多径信道中的QPSK系统进行BER性能仿真，并与在理想的AWGN信道（没有多径）中同样系统的BER性能进行比较。(In this example, we have three fixed-path multipath AWGN channel QPSK system BER performance simulation, and in an ideal AWGN channel (no multipath) in the same system BER performance comparison Progressive line.)

这是一个实现MCMA+DD算法的盲均衡算法，在已有的CMA算法基础上进行改进，可以解决相位旋转(This is a realization MCMA+DD algorithm blind equalization algorithm, the existing CMA algorithm based on improved phase rotation can be solved)

Region Growing (2D3D grayscale)

对于高程数据的处理，通常需要各种格式之间的转换，此程序是将usgs高程数据转为dem格式的数据。(For the treatment of elevation data, usually need to convert between various formats, this program is the USGS elevation data to DEM format data. )

一些matlabde 应用程序，20个以上，适合初学者学习和研究。(Matlabde some applications, more than 20, suitable for beginners to learn and research.)