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PPM_UWB_rake-reciever
仿真了在多径传播信道条件下仿真rake接收机的工作过程。接收机采用MRC方式，并考虑了降低接收机复杂性的不同方法。(Simulates channel estimation for a discrete-time channel impulse response hf with time resolution ts in seconds. In addition, the function uates the weighting factors to be used in a RAKE receiver implementing Maximal Ratio Combining.)
- 2015-04-16 21:28:42下载
- 积分：1
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2009341010559664
主要时STTC，的编码时我再网络上收及的(sttc )
- 2009-05-09 14:01:42下载
- 积分：1
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数字
说明： 基于matlab的数字信号传输系统仿真，pdf文档末尾是完整的matlab代码。(Experiment of digital signal transmission system based on MATLAB)
- 2021-02-06 16:11:59下载
- 积分：1
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rs_hdd
为了防止码间干扰，rs码编译码采用硬判决+维特比译码(rs_hdd_vterbi)
- 2010-12-29 00:36:11下载
- 积分：1
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osc_filter
正交信号校正法主要用于近红外光谱矩阵的预处理。其原理是将光谱阵与全氮含量阵正交,滤除光谱与因变量Y阵无关的信号,再建立定量校正模型,达到简化模型及提高模型预测能力的目的。(Orthogonal Signal Correction(OSC) removes variance in the X-block which is orthogonal to the Y-block. Such variance is identified as some number of factors (described as components) of the X-block which have been made orthogonal to the Y-block. When applying this preprocessing to new data, the same directions are removed from the new data prior to applying the model.)
- 2020-10-28 16:29:57下载
- 积分：1
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15student
student project for start programing
- 2014-12-02 16:12:27下载
- 积分：1
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IsingModel-author
Ising model for ferromagnetism
- 2013-12-11 22:39:29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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zadaci
m-file for recording and playing audio
- 2010-11-20 07:36:55下载
- 积分：1
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bf-boattracking
对基于粒子滤波的目标跟踪进行仿真，附带有最后仿真的视频。(Based on the target tracking particle filter are simulated, accompanied by the simulation of the video.)
- 2011-01-06 17:14:12下载
- 积分：1
