ADT和DC直流提取技术对OOK/FSO 系统性能的优化

J4 ›› 2018, Vol. 35 ›› Issue (1): 108-114.

ADT和DC直流提取技术对OOK/FSO 系统性能的优化

朱宝芹

南京邮电大学

收稿日期:2016-11-09 修回日期:2016-12-22 出版日期:2018-01-28 发布日期:2018-04-04
通讯作者: 朱宝芹

Performance Improvement of OOK /FSO Communication Systems by ADT and DC Extract Technologies

Received:2016-11-09 Revised:2016-12-22 Published:2018-01-28 Online:2018-04-04

摘要/Abstract

摘要： 为改善自由空间光通信（FSO）系统中传统判决门限技术的不足以及连续波参照光辅助检测技术中参考光不携带任何信息给系统带来的高成本损耗。提出一种基于已判决信号的量化电压获得当前码元判决门限的自适应判决门限技术，同时分析提取信号中的直流分量作为连续波参考光来估计大气湍流信道的波动特性。研究结果表明,在误码率为10-3的条件下,自适应判决门限技术和直流提取技术具有更低的功率损耗,可显著提高FSO通信系统的性能。

关键词: 连续波参考光

Abstract: In order to overcome the shortcomings of traditional decision threshold technology and the reference light do not carry any information in Reference Continuous Wave Light(RCWL) technology which brings the high cost to the free space optical communication (FSO) system. adaptive decision threshold (ADT) technique that current decision threshold is obtained according to the quantized voltage of judged signal previously is proposed . At the same time ,DC component in the signal is extracted as a reference continuous wave(CW) light to estimate the fluctuating characteristics of atmospheric turbulence channel. The research results show that under the condition of bit error rate of 10-3, the adaptive decision threshold and dc extraction technology has lower power loss, which can significantly improve the performance of FSO communication system.

Key words: reference continuous wave (CW) light

中图分类号:

朱宝芹张明清陈健. ADT和DC直流提取技术对OOK/FSO 系统性能的优化[J]. J4, 2018, 35(1): 108-114.

参考文献

[1] Antonio G Z, Carmen C V, Beatriz C V. Outage performance of MIMO FSO links over strong turbulence and misalignment fading channels.[J]. Optics Express, 2011, 19(14):13480-96.
[2]. Liu X. Free-space optics optimization models for building sway and atmospheric interference using variable wavelength[J]. IEEE Transactions on Communications, 2009, 57(2):492-498.
[3]. Jurado-Navas A, Garcia-Zambrana A, Puerta-Notario A. Efficient channel model for free space optical communications[C]Electrotechnical Conference, 2006. MELECON 2006. IEEE Mediterranean. IEEE, 2006:631 - 634.
[4]. Cvijetic N, Qian D, Yu J, et al. Polarization-Multiplexed Optical Wireless Transmission With Coherent Detection[J]. Journal of Lightwave Technology, 2010, 28(8):1218-1227.
[5]. Letzepis N, Fabregas A G I. Outage probability of the Gaussian MIMO free-space optical channel with PPM[J]. Communications IEEE Transactions on, 2009, 57(12):3682-3690.
[6]. Letzepis N, Holland I, Cowley W. The Gaussian free space optical MIMO channel with Q-ary pulse position modulation[J]. IEEE Transactions on Wireless Communications, 2008, 7(5):1744-1753.
[7]. Djordjevic I B, Vasic B, Neifeld M /. Multilevel coding in free-space optical MIMO transmission with Q-ary PPM over the atmospheric turbulence channel[J]. IEEE Photonics Technology Letters, 2006, 18(14):1491-1493.
[8]. Zhao X, Yao Y, Sun Y, et al. Circle Polarization Shift Keying With Direct Detection for Free-Space Optical Communication[J]. Journal of Optical Communications & Networking, 2009, 1(4):307-312.
[9]. Gappmair W, Flohberger M. Error performance of coded FSO links in turbulent atmosphere modeled by gamma-gamma distributions[J]. Wireless Communications IEEE Transactions on, 2009, 8(5):2209-2213.
[10] Wang Z, Zhong W D, Yu C. Performance Improvement of OOK Free-Space Optical Communication Systems by Coherent Detection and Dynamic Decision Threshold in Atmospheric Turbulence Conditions[J]. IEEE Photonics Technology Letters, 2012, 24(22):2035-2037.
[11]. Grant K J, Corbett K A, Clare, B.A, et al. Dual wavelength free space optical communications[C]// Lasers and Electro-Optics, 2005. (CLEO). Conference on. IEEE, 2005:740-742 Vol. 1.
[12] Wang Z, Zhong W D, Yu C, et al. Performance improvement of on-off-keying freespace optical transmission systems by a copropagating reference continuous wave light.[J]. Optics Express, 2012, 20(8):9284-9295.
[13] Aniceto B, Joseph K. Performance of synchronous optical receivers using atmospheric compensation techniques.[J]. Optics Express, 2008, 16(18):14151-62.