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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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opf
系统的结构参数和负荷情况都已给定时，调节可利用的控制变量(如发电机输出功率、可调变压器抽头等)来找到能满足所有运行约束条件的，并使系统的某一性能指标(如发电成本或网络损耗)达到最优值下的潮流分布。(Optimal power flow(OPF) is a fundamental tool in power system planning and operation.)
- 2021-01-25 16:28:43下载
- 积分：1
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wuchagaijin
谱分析的改进程序，适用于初学者，也是刚刚开始学的，水平不是很高(Spectral analysis of the improvement program for beginners, is just beginning to learn, is not very high level of)
- 2010-11-13 18:32:11下载
- 积分：1
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five_level_diode_clamped_pwmnikhil
five level diode clamp PWM.this is th e matlab simulink readyly usable file for PWM techinique
- 2011-05-23 17:04:02下载
- 积分：1
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MATCOM_VC
MATCOM与VC_混合编程中自定义函数作为输入参数的调用方法.PDF(Mixed programming with VC_ MATCOM defined function call method as an input parameter. PDF)
- 2011-01-19 23:29:26下载
- 积分：1
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work
说明： matlab经典算法，数学建模很有用的。(matlab classic algorithms, mathematical modeling very useful.)
- 2010-05-01 02:59:16下载
- 积分：1
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subprogram
分数阶傅立叶变换，可用于LFM信号的相干源信号的估计(Fractional Fourier Transform can be used for LFM signal of the coherent source signal estimate)
- 2012-05-03 22:42:19下载
- 积分：1
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ofdm
Ofdm transmetter/receiver
- 2011-07-18 14:20:43下载
- 积分：1
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PIDSystem
This m-file is written in MATLAB. It instroduces a simple method to create a PID controller
- 2010-09-09 15:45:06下载
- 积分：1
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three
matlab学习，适合初学者对matlab软件进行学习(matlab learning software for beginners to learn matlab)
- 2011-08-06 15:28:28下载
- 积分：1
