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首页> 外文会议>Asian conference on intelligent information and database systems >Pointing Error Effects on Performance of Amplify-and-Forward Relaying MIMO/FSO Systems Using SC-QAM Signals Over Log-Normal Atmospheric Turbulence Channels
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Pointing Error Effects on Performance of Amplify-and-Forward Relaying MIMO/FSO Systems Using SC-QAM Signals Over Log-Normal Atmospheric Turbulence Channels

机译：指向误差对对数常态湍流通道上使用SC-QAM信号的放大转发中继MIMO / FSO系统性能的影响

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摘要

In this work, we analyze pointing error effects on performance of Amplify-and-Forward (AF) relaying multiple-input multiple-output (MIMO) free space optical (FSO) communication system employing subcarrier quadrature amplitude modulation (SC-QAM) signal over log-normal distributed atmospheric turbulence channels. We study the pointing error effect by taking into account the influence of beam-width, aperture size and jitter variance on the average symbol error rate (ASER), which is derived in closed-form expressions of MIMO/FSO and SISO/FSO systems. In addition, the number of relaying stations is taken into account in the statistical model of the combined channel including atmospheric loss, atmospheric turbulence and pointing error. The numerical results show that by combining AF relaying stations and MIMO/FSO configurations, the link length can be extended due to the transmitted power is reduced accordingly to the amplifier gain. Moreover, performance of AF relaying MIMO/FSO systems is better than that of AF relaying SISO/FSO systems at the same link length.
机译：在这项工作中，我们分析了指向错误对采用子载波正交幅度调制（SC-QAM）信号的中继转发多输入多输出（MIMO）自由空间光（FSO）通信系统性能的影响对数正态分布的大气湍流通道。我们通过考虑光束宽度，孔径​​大小和抖动方差对平均符号错误率（ASER）的影响来研究指向误差的影响，该误差是从MIMO / FSO和SISO / FSO系统的闭式表达式中得出的。另外，在组合信道的统计模型中考虑了中继站的数量，包括大气损耗，大气湍流和指向误差。数值结果表明，通过组合AF中继站和MIMO / FSO配置，由于发射功率随放大器增益而降低，因此可以延长链路长度。此外，在相同链路长度下，AF中继MIMO / FSO系统的性能要优于AF中继SISO / FSO系统。

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