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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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基于PCA+PSO-ELM的工程费用估计
说明： 利用主成分分析法结合粒子群（PSO）优化极限学习机(ELM)进行工程费用估计预测(In this paper, principal component analysis (PCA) combined with particle swarm optimization (PSO) optimization extreme learning machine (ELM) is used to estimate and forecast engineering cost)
- 2020-12-16 14:44:37下载
- 积分：1
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xinhao
此程序适合对数字基带信号的仿真，并对两径信道传递函数曲线分析(This program suitable for digital base-band signal simulation, and the two-path channel transfer function curve analysis)
- 2009-03-13 23:11:04下载
- 积分：1
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logmapo
说明： 超宽带通信仿真程序，脉冲成型仿真技术(ultra-wideband communications simulation program, pulse shaping simulation technology.)
- 2006-04-13 13:51:33下载
- 积分：1
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LQR_comp
computes the LQG controller parameters, [K1 K2 K3 K4]
system states are the HF components of:
LSS speed, HSS speed, coupling internal torque, wind torque
uses the linearzid WECS model with parameters computed in linf_param_comp.m file
uses quadratic performance index with weighting coefficient weight
- 2014-10-31 20:04:08下载
- 积分：1
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hiperlan2_4
Hiper LAN Matlab/Simulink simulation module
- 2010-09-10 18:12:40下载
- 积分：1
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matlab11
用追赶法求三对角方程和Neville的插值法的matlab仿真程序可以学习的小材料(Method used to catch up Tridiagonal and Neville' s interpolation matlab simulation program to study the small material)
- 2010-10-22 16:47:28下载
- 积分：1
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2yuanzhen
均匀圆阵的指向性仿真和模拟，原创，最后求出其指向性图，参数可自行代换(Uniform circular array of directional and analog simulation, originality, and finally obtained its directivity diagram, parameters can be self-substitution)
- 2008-04-14 19:08:09下载
- 积分：1
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tls
简单易懂，操作简便，很实用的matlab程序(Easy-to-read, easy to operate, it is useful matlab program)
- 2008-08-20 15:34:49下载
- 积分：1
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source-code-of-numerical-calculation
《MATLAB数值计算案例分析》，内含各种源码，运用MATLAB解决各种数值计算问题。( Case analysis MATLAB numerical calculation, containing all the source code, using MATLAB to solve a variety of numerical calculation problems.)
- 2014-11-08 11:04:08下载
- 积分：1
