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V788d3
中兴手机v788d改cpn通过cpn改IMEI(change v788d cpn)
- 2014-01-16 15:17:02下载
- 积分:1
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802[1].3afPandPP802.3at-2009
802.3af/at标准,POE 供电协议(standard of 802.3af/at)
- 2011-05-28 10:26:46下载
- 积分:1
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370511
psk调制,在matlab命令区输入bpskdigital[1 0 1 1 0 0 1 0],1]按运行,即可看到调制波(Psk modulation, input bpskdigital [1 0 1 0 0 0] in the matlab command area, 1] press operation, you can see the modulation wave)
- 2019-03-26 23:08:40下载
- 积分:1
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AddressList
提供通讯录成员的查询、增加、更新及删除等功能。(Provide contacts membership query, add, update, and delete functions.)
- 2013-09-24 19:26:07下载
- 积分:1
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NetRemoting通信例子
说明: C# 写的NetRemoting通信例子
双向通信(NetRemoting Communication Example Written in C#
Two-way communication)
- 2020-06-18 21:00:02下载
- 积分:1
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changesampleofpcmfile
PCM文件采样率转换,其中可以自己定义采样率。作为WAV文件进行存储。效果较好。注意使用时确定源文件采样率。(PCM file sample rate conversion, which could define their own sampling rate. As a WAV file is stored. Effective. Note that when used to determine the source file sample rate.)
- 2020-11-04 19:59:52下载
- 积分:1
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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。
(good)
- 2020-11-04 23:49:52下载
- 积分:1
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MIMO OFDM
实现基于STBC的MIMO_OFDM通信系统在不同信噪比情况下接收端的误比特率的仿真。发射端包括基于基带调制、空时编码、导频插入、IFFT、串并合并以及添加循环前缀;接收端包括去除循环前缀、取出导频估计信道、FFT运算以及并串合并,空时解码等。仿真中采用QPSK、空时编码采用4*3的复正交空时编码矩阵。OFDM子载波数为100,每个子载波传输66个符号,每个符号2比特。IFFT长度为512个符号。发射天线为3个接收天线为2个。(The BER simulation of MIMO_OFDM communication system based on STBC under different SNR is realized. The transmitter includes baseband modulation, space-time coding, pilot insertion, IFFT, serial-parallel combination and adding cyclic prefix; the receiver includes removing cyclic prefix, extracting pilot estimation channel, FFT operation, parallel-serial combination, space-time decoding, etc. The complex orthogonal space-time coding matrix is used in QPSK and space time coding in 4*3. The number of OFDM subcarriers is 100, and each subcarrier transfers 66 symbols with 2 bits per symbol. IFFT is 512 symbols in length. The transmitting antenna is 3 receiving antennas, 2.)
- 2020-12-07 16:19:21下载
- 积分:1
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ML
说明: 关于ofdm系统中ml检测信号的算法,供大家参考(ML detection algorithm for OFDM system)
- 2019-03-11 22:01:59下载
- 积分:1
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配套资料源码
说明: 通信仿真 实现了PAM调制解调 误码率计算等等功能,有助于各方面学习(Communication simulation realizes the error rate calculation of PAM modulation and demodulation and other functions, which is helpful for all aspects of learning.)
- 2019-05-23 19:30:37下载
- 积分:1