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QPSKsimulat

于 2020-11-16 发布 文件大小:2KB
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下载积分: 1 下载次数: 29

代码说明:

  基于systemview的qpsk原理仿真(qpsk based on the principle of Systemview Simulation)

文件列表:

QPSK原理仿真.svu

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    针对MIMO-OFDM系统中期望最大化(EM)信道估计算法在高信噪比(SNR)下带来的误差地板(EF)现象,且OFDM符号的数据传输效率随发射天线数的增加而明显降低,提出一种改进的高效EM信道估计算法。该算法首先引入一种准确的等效信号模型并推导出一种修正的EM算法,改善了EM算法在高SNR下的性能 在多个OFDM间利用相位正交导频序列来提高数据传输效率,同时进行联合信道估计以提高估计性能。仿真实验验证了所提算法具有更高的信道估计性能和更高的数据传输效率。(For multiple-input multiple-output with orthogonal frequency division multiplexing(MIMO-OFDM) systems,the error floor(EF) phenomenon at high signal noise rate(SNR) was induced by the expectation maximum(EM) channel estimation algorithm.In addition,the data transmission efficiency was declined obviously with the increasing number of transmit antennas.According to these problems,an improved and efficient EM channel estimation algorithm was pro-posed.Firstly,an accurate and equivalent signal model was introduc...)
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    积分:1
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    说明:  单频、宽带信号的线阵、面阵波束形成,用的是fft能量或者幅度求和的做法(Beamforming of linear array and area array for single frequency and broadband signals)
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    积分:1
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    说明:  opnet学习入门视频教程 这个对初学者很有用的(opnet Getting Started video tutorial to learn this very useful for beginners)
    2011-03-26 10:07:33下载
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    It is mainly used for ARQ simulation ,such as stop-and-wait
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    bluetooth é o que há, manda ve no perl.
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