datafit

说明：  matlab 基于形状的图像检索算法 关于七个不变矩的主要算法 中调用步骤！ ！！！！！！(matlab image retrieval algorithm based on the shape of seven invariant moments on the main algorithm, called the steps! ! ! ! ! ! !)

基于simulink的无线通信系统的设计，希望对大家有帮助(Simulink-based wireless communication system design, we hope tobangzhu)

beamforming of smart antena

该代码为分布式MIMO天线选择的最优算法，递增算法，递减算法以及基于范数的算法。(The code for the Distributed MIMO antenna selection of the optimal algorithm, incremental algorithm, descending algorithm and norm-based algorithm.)

结合PCA的尺度不变特征变换(SIFT)算法，双向PCS控制仿真，使用matlab实现智能预测控制算法。( Combined with PCA scale invariant feature transform (SIFT) algorithm, Two-way PCS control simulation, Use matlab intelligent predictive control algorithm.)

Synthetic aperture radar imaging provides high resolution images of large areas. The intensities of pixels in a SAR image are based on the spatial orientation, roughness, and dielectric constant of the surface imaged. SAR is an active sensor, transmitting its own energy, and then measuring the return scattered by the earth抯 surface back to the satellite抯 antenna. SAR processing is the transformation of raw SAR signal data into a spatial image. In this communication, we present a contribution concerning implementation of a SAR image formation with the IDL language. This process is performed in a frequency domain correlation of the received signal including range compression, range migration, and azimuth compression. The output is the final step in which the data is transposed back into its original format and written to an output file.

Introduction to Kalman Filter

这是一个Alamouti空时码的仿真，包含2发1收或2发2收。(This is an Alamouti space-time code simulation, including two made an entry or two 2 admission.)

The sourcecode is about optical character recognision using matlab.

首先根据短训练字的特性进行相关运算，进行信号到达检测，当检测到相关值大于门限一定次数后，认为有信号到达。然后根据长训练字的特性，进行相关运算，进行OFDM符号FFT窗口起始位置的估计。估计出FFT窗口的位置后，先在时域进行小频偏的估计，将两个长训练字进行小频偏补偿后，进行FFT运算，根据FFT运算的结果进行整数倍频偏的估计。这些参数估计完成后，就可以进行数据解调了。先对数据部分进行完整的频偏补偿，然后根据估计的FFT窗口位置进行FFT运算得到频域的数据，进行解调。然后在对应于导频的子载波位置上提取出导频信息，根据导频信息估计出剩余定时误差以及剩余的信道响应误差，将误差量送入环路进行跟踪。当收到所有数据后，重新回到信号到达检测状态，进行下一次信号到达的检测和信号接收。(First, according to the characteristics of the short training word correlation operation, the signal reaching the detector, when the detected correlation value is greater than the threshold after a certain number of times that a signal arrives. And then the characteristics of long training word, the correlation operation for the FFT window starting position of an OFDM symbol estimate. The estimated position of the FFT window, the first small frequency offset in the time domain estimation, the two long training word small frequency offset compensation, the FFT operation, the FFT result of the operation for integer frequency offset estimate. These parameter estimation is completed, the data can be demodulated on. The first portion of the data for a complete frequency offset compensation, and based on the estimated FFT window position of the FFT operation to obtain frequency domain data, demodulated. Then corresponding to the position of the pilot subcarriers are extracted on pilot inform)