具有SIMO链路的多跳m - PPM FSO系统在强大气湍流信道和指向误差下的性能

2013 Third World Congress on Information and Communication Technologies (WICT 2013) Pub Date : 2013-12-01 DOI:10.1109/WICT.2013.7113122

N. Dang, L. H. Nguyen, H. Pham

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引用次数: 3

摘要

强大气湍流和指向误差是自由空间光通信系统面临的主要挑战。在本文中，为了克服这些挑战，我们建议在FSO系统中采用单输入多输出(SIMO)链路(即接收器分集)的多跳传输。此外，为了进一步提高系统性能，还将采用m - m脉冲位置调制(PPM)和符号检测转发中继方案。在考虑背景噪声和热噪声影响的情况下，利用等增益组合(EGC)和最大比组合(MRC)分集技术，给出了多跳m - m - PPM FSO系统误码率(BER)的封闭表达式。数值结果表明，多跳传输和接收机分集相结合是减小强大气湍流和指向误差影响的有效方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Performance of multi-hop M-ary PPM FSO systems with SIMO links over strong atmospheric turbulence channel and pointing errors

Strong atmospheric turbulence and pointing errors are major challenges in free-space optical communication (FSO) systems. In this paper, in order to overcome these challenges, we propose to employ multi-hop transmission with single-input multiple-output (SIMO) links (i.e., receiver diversity) in FSO systems. In addition, M-ary pulse-position modulation (PPM) and symbol detect-and-forward relaying scheme will be used to further improve the system performance. We formulate the closed-form expressions for bit error rate (BER) of multi-hop M-ary PPM FSO systems with equal gain combining (EGC) and maximum ratio combining (MRC) diversity techniques taking into account the effects of background noise and thermal noise. Numerical results indicate that the combination of multi-hop transmission and receiver diversity is a great solution for reducing effects of strong atmospheric turbulence and pointing errors.

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2013 Third World Congress on Information and Communication Technologies (WICT 2013)

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