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OFDM rece matlab
接收端采用的算法和程序流程与发送端发送的OFDM符号的帧结构有关系。具体的帧结构，以及定时估计，频偏估计，剩余误差跟踪的算法可参考算法说明文档。这里对程序的流程进行说明。
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。
(The receiving end uses the algorithm and the program flow and the frame structure of the OFDM symbol transmitted by the sending end. Specific frame structure, and timing estimation, frequency offset estimation, residual error tracking algorithm can refer to the documentation. Here to illustrate the process of the program.
First, according to the characteristics of the short training word correlation operation, the signal reaches the detection, when the correlation value is greater than the threshold of a certain number of times, that there is a signal to reach. Then, according to the characteristics of the long training word, the correlation operation is carried out, and the initial position of the OFDM symbol FFT is estimated. The estimated position of the FFT window, first in the time domain for small frequency offset estimation, two long training word for small frequency offset compensation, the FFT operation. According to the result of FFT for integer frequency bias estimation. Af)
- 2020-11-05 00:19:52下载
- 积分：1
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xiaobobaofenjie
用于对振动信号进行小波包分解，能量谱计算，从而进行后续分析(It is used to analyze the vibration data by wavelet packet decomposition, wavelet packet energy spectrum, and make further analysis.)
- 2017-05-09 09:50:32下载
- 积分：1
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abs
最简单的匹配算法，通过计算图像的灰度差来实现图像的匹配功能(The easiest match to achieve the image matching algorithm to calculate the image intensity difference)
- 2012-05-17 11:34:41下载
- 积分：1
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program15_ofdm_pilot_estimation
channel estimation for ofdm using pilots
- 2015-01-14 10:48:24下载
- 积分：1
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shichuan
该程序是石川法计算齿轮啮合冲击载荷的matlab程序(The program is calculated Ishikawa gear shock loads matlab program)
- 2020-07-03 11:20:02下载
- 积分：1
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Rongekutta
求解陀螺仪的姿态角，采用四元素的四阶龙格库塔法求解，含姿态初始四元素的确定。(Solving gyro attitude angle, using the four elements of the fourth-order Runge-Kutta method to solve, including the initial four elements determined attitude.)
- 2013-05-24 09:59:24下载
- 积分：1
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hmt1d_code
good code Files: (see file headers, or type help file in MATLAB, for more info)
README - this file
trainEM_tree.m - function that takes a wavelet transform, a number of
states, and a maximum number of iterations and returns HMT
parameters. No convergence criteria is specified right now (easily
fixed), it just runs a specified number of iterations (default 30).
- 2012-05-20 20:08:03下载
- 积分：1
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DTMB
DTMB，全称Digital Television Terrestrial Multimedia Broadcasting。上述资料包含了最新标准，及链路级仿真matlab代码(Digital Television Terrestrial Multimedia Broadcasting)
- 2020-11-06 11:29:50下载
- 积分：1
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eg8_7
通过小波包分析带有随机噪声的信号，分析其障碍信号的功率谱(Use wavelet packet analysize signal with random noise, analyzes the obstacle signal power spectrum)
- 2016-05-05 17:41:55下载
- 积分：1
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IFFT_manual
A Matlab IFFT implementation using matlab itself
- 2009-04-25 16:27:06下载
- 积分：1
