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dwt1-watermark
How to embedding binary image in digital audio & how to extract that binary image
- 2012-09-18 15:10:10下载
- 积分：1
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fade
说明： 关于瑞利衰落的一段很实用的代码。特别在BPSK调制中对于学习通信方面的同学很有帮助。(Rayleigh fading on a very useful code. BPSK modulation, especially in communications for students to learn helpful.)
- 2010-05-22 13:27:27下载
- 积分：1
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compare
int compare(const char* a, const char* b, int size)
{
for (int i = 0 i < size i ++)
{
if (a[i] != b[i])
{
return i
}
}
return -1
}
(int compare(const char* a, const char* b, int size)
{
for (int i = 0 i < size i++)
{
if (a[i] != b[i])
{
return i
}
}
return-1
}
)
- 2014-09-02 13:53:50下载
- 积分：1
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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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smoothLine
Creates the data for a smooth line going through the points given
- 2009-12-29 17:50:03下载
- 积分：1
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bilinear
implementing the bilinear transformation
- 2011-10-13 13:32:42下载
- 积分：1
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smooth2
Low pass filter in order to detect edge
- 2020-08-23 14:07:52下载
- 积分：1
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matlab
本书从计算、绘图和编程3 个方面介绍MATLAB 的基础知识，可供对MATLAB 感兴趣的大学生、研究生和科研人员阅读和使用。(Book from the calculations, drawing and programming 3 introduces the basics of MATLAB, MATLAB available for interested students, graduate students and researchers to read and use.)
- 2013-07-14 21:38:09下载
- 积分：1
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Downloads
关于半脆弱水印的几篇文章，其中包括小波变换的应用以及contourlet变换的应用等，涉及领域为半脆弱数字图像水印已经篡改检测。(Semi-fragile watermarking of several articles, including the application of wavelet transform and Contourlet transform application areas for semi-fragile digital image watermarking has tamper detection.)
- 2013-04-22 21:01:41下载
- 积分：1
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Thgorithm
说明： 测试系统模型的测试路径选择算法研究The test based on the test system model path algorithm(The test based on the test system model path algorithm)
- 2011-03-01 17:19:14下载
- 积分：1
