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improvethecoordinationofperception
由于实际信道中的多径和阴影效应，单个认知用户频谱感知的性能受到影响，因此需要靠不同用户间的协同频谱感知来对抗多径和阴影效应。本设计要求在文中采用一种协作机制，即两用户进行协作频谱感知，提高主用户的检测率，减少检测时间，并且得到捷变增益。要求给出仿真结果。(As the actual channel of the multi-path and shadow effect, a single user of spectrum sensing of cognitive performance are affected, it needs to depend on collaboration between different users of spectrum sensing to combat multipath and shadow effects. The design requirements in the text using a cooperation mechanism, namely, two user collaborative spectrum sensing, to improve the detection rate of the primary users, reducing detection time, and get agility gain. Required to give simulation results.)
- 2010-05-08 09:10:41下载
- 积分：1
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matlabM-QAM
基于matlab的M-QAM通信系统的仿真.txt(Matlab M-QAM communication system simulation. Txt)
- 2012-06-07 22:51:41下载
- 积分：1
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6.-LP-Example-6-Diet-Problem
Diet Problem in Linear programming.
- 2014-10-07 06:09:56下载
- 积分：1
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Desktop
本段代码是用来做布拉格光纤光栅的仿真，耦合模式算法。(This section of code is used for the simulation of fiber Bragg grating coupled model algorithm)
- 2012-08-21 16:34:24下载
- 积分：1
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MATLAB-Programming-for-Engineers--4e
MATLAB Programming for Engineers第四版，巨好的参考代码(MATLAB Programming for Engineers, 4e)
- 2013-02-21 19:15:05下载
- 积分：1
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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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1evaluation-image-fusion--Matlab
1基于Matlab的遥感图像融合效果的客观评价方法(1 objective evaluation of the effect of the remote sensing image fusion based on Matlab.)
- 2014-08-13 04:56:56下载
- 积分：1
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EKF_A-Mechanical-System
An example of an Extended Kalman Filter applied at a mechanical system.
- 2013-11-04 19:13:24下载
- 积分：1
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Matlab-canny-aroua
matlab implementation of a function that calculate canny edge
- 2013-11-13 16:19:22下载
- 积分：1
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clock1
音乐闹钟的实现，定时到了以后音乐提醒，即音乐闹钟(the music clock)
- 2011-06-03 19:05:27下载
- 积分：1
