基于自由空间光学的OFDM实现

2015 International Conference on Green Computing and Internet of Things (ICGCIoT) Pub Date : 2015-10-08 DOI:10.1109/ICGCIOT.2015.7380423

Raminderjit Singh, G. Soni

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引用次数: 13

摘要

OFDM(光频分复用)提供了一种很有前途的解决方案，即使在雾、霾、雨等恶劣的大气条件下，也可以为自由空间光链路提供高数据速率、大链路范围。由于数据分布在大量正交载波上，利用OFDM技术可以实现高频谱效率。研究了基于正交频分复用(OFDM)的自由空间光通信系统的性能。采用4级QAM和OFDM调制，可在不同天气条件下通过FSO系统传输20Gbps数据。利用半导体光放大器(SOA)可以进一步改善链路范围。在目前的工作中，在晴朗天气(衰减0.11dBm)下，最大连接距离可达260公里，而在大雾天气(衰减22dBm)下，最大连接距离可达4公里。

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Realization of OFDM based free space optics

OFDM(Optical Frequency Division Multiplexing) provides a promising solution for delivering high data rate , large link range for Free space optical link even for worse atmospheric condition like fog, haze, rain etc. With the help of OFDM high spectral efficiency can be achieved as the data is distributed over large number of orthogonal carrier. This paper investigate the performance of Orthogonal Frequency Division Multiplexing (OFDM) based Free Space optical (FSO) Communication System. By using 4-Level QAM and OFDM Modulation, 20Gbps data is transmitted through the FSO system under different weather condition. Further improvement in the link rage can be done by use of SOA (semiconductor optical amplifier). In the current work maximum link range achieved is 260km for clear weather (attenuation 0.11dBm) whereas for heavy fog(attenuation 22dBm) the maximum distance achieved is 4 km.

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2015 International Conference on Green Computing and Internet of Things (ICGCIoT)

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