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OFDM
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)
- 2020-11-04 23:49:52下载
- 积分：1
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clear
已知一个二维数据，y=f(x), 想使得这个数据绕y轴旋转而成为一个旋转对称的三维数据(A two-dimensional data is known, y=f (x), to make the data around the Y axis and become a rotationally symmetric 3D data)
- 2021-05-13 01:30:03下载
- 积分：1
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signal333
自编 包括动态时间校准算法 求snr算法 及其子程序(Including dynamic time self-calibration algorithm for SNR algorithm and its subroutine)
- 2008-04-10 10:30:01下载
- 积分：1
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jiexiangguan_LMS_multi_input_adv1
基于LMS算法对相关加噪信号的波达角方向估计，基于32单元线阵(LMS algorithm based on noise-related signals in the direction of arrival angle estimation, based on the 32-cell linear array)
- 2009-07-10 11:28:26下载
- 积分：1
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Matlab-earthquake
基于matlab语言的抗震工程分析，里面很多代码值得学习。(Matlab language-based seismic engineering analysis, which a lot of code is worth studying.)
- 2013-12-31 19:21:20下载
- 积分：1
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BCH-RS
BCH 和RS级联编码及其解码 中间涉及到二进制转化(BCH and RS encode and decoder)
- 2013-04-11 23:43:49下载
- 积分：1
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Matlab-Programming
matlab programming for engineers
- 2009-10-12 19:15:21下载
- 积分：1
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matlab-gui1111111
说明： matlab-gui 自动控制原理-采样控制系统(Matlab-gui Automatic Control Theory- sampling control system)
- 2006-04-25 09:00:24下载
- 积分：1
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chip_histogram_features
特征提取是模式识别中最重要的一个部分，这里提供的matlab代码计算一些基本的话音特征，而且，提供了一个简单的基于直方图的特征分类方法的实现。基本的特征包括：特征统计、Energy Entropy Standard Deviation (std)、均值信息熵、过零率检测、频谱衰减等等六个特征(Pattern recognition feature extraction is the most important part, here' s matlab code to compute some basic voice features, but also provides a simple classification method based on histogram characteristics of the implementation. Basic features include: Features and Statistics, Energy Entropy Standard Deviation (std), mean entropy, the zero-rate detection, attenuation, and so the six characteristics of the spectrum)
- 2011-05-25 23:07:32下载
- 积分：1
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sijielonggekutaf
Fourth order runge kutta method
The double chromosphere program
- 2015-04-21 16:27:50下载
- 积分：1
