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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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RBF、GRNN和PNN神经网络
RBF、GRNN和PNN神经网络课程，PPT，以及程序代码，希望对你有用！(RBF, GRNN and PNN neural network courses, PPT, and program code, I hope useful for you!)
- 2018-08-22 15:48:27下载
- 积分：1
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sss
Implementation of Unsystematic Cyclic Codes
on DSP 56F8300 Hybrid Board
- 2010-09-03 03:29:37下载
- 积分：1
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4pam
4-PAM调制方式在AWGN下的误码率和误比特率(4- PAM modulation mode under AWGN bit error rate and bit error rate)
- 2020-11-29 23:19:28下载
- 积分：1
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Pack Kurtogram V4
说明： kurtogram是一种四阶谱分析工具，用于检测和表征信号中的非平稳性。可用于轴承的故障诊断(The kurtogram is a fourth-order spectral analysis tool elaborated for detecting and characterising nonstationarities in a signal. It relies on the assertion that each type of transient is associated with an optimal (frequency/frequency resolution) dyad (f ; Df) which maximises the kurtosis. The Fast Kurtogram computes the kurtogram over a grid that finely samples the (f ; Df) plane. Its complexity is on the order of N log N.
This is the "plain vanilla" code used in paper:
J. Antoni, Fast Computation of the Kurtogram for the Detection of Transient Faults, Mechanical Systems and Signal Processing, Volume 21, Issue 1, January 2007, Pages 108-124.)
- 2020-10-30 22:20:01下载
- 积分：1
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函数寻优
说明： 入侵杂草算法是近年来提出的比较新颖的一种群体智能算法。(Invasive weed algorithm is a new swarm intelligence algorithm proposed in recent years, which has good performance in function optimization.)
- 2021-02-06 14:32:03下载
- 积分：1
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3-val
将一幅多媒体图像根据各个块的不同特性蔡用不同的编码方式(Multimedia will be an image block according to different characteristics of CAI use different encoding)
- 2007-12-12 21:43:47下载
- 积分：1
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FFT-DTFT-Rife
自编的FFT、DTFT程序用于频谱分析，Rife是一种频谱校正方法，分别给出了以上算法的Matlab程序并且画出了图形。已调试通过。(FFT、DTFT codes writen by Matlab,for spectrum analyse.Rife is a method for spectrum correction.Figures are also given.These codes has been tested already.)
- 2021-01-05 09:48:54下载
- 积分：1
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Relating-EbNo-SNR
理解信噪比、比特能量与噪声能量比的计算方法、及相互关系(Understanding and Relating Eb/No, SNR, and other Power Efficiency Metrics)
- 2014-11-05 15:09:42下载
- 积分：1
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chaotic_1d
CHAOTIC MAP 1D AND 2D FOR MATLAB
- 2014-11-07 23:21:05下载
- 积分：1
