Enhanced performance of FSO link using OFDM and comparison with traditional TDM-FSO link

Author

Kumar, Pravindra ; Srivastava, Anand

Author_Institution

Sch. of Comput. & Electr. Eng., Indian Inst. of Technol. Mandi, Mandi, India

fYear

2015

fDate

23-25 April 2015

Firstpage

65

Lastpage

70

Abstract

Free space optical (FSO) communication systems with its high data rate, capacity same as optical fiber and secure communication over unlicensed spectrum have become a promising technology where the installation of optical fiber is not possible. However, bit-error-rate (BER) performance of FSO link depends on the atmospheric conditions and turbulence strength. In this paper, the performance of intensity modulation/direct detection-time division multiplexed-FSO (IM/DD-TDM-FSO) link and IM/DD-orthogonal frequency division multiplexed-FSO (IM/DD-OFDM-FSO) link are analytically compared. BER is expressed assuming the turbulence as Gamma-Gamma distribution. At BER of 10^-3, there is 14.7 dB gain in signal-to-noise ratio (SNR) and 7.2 dB improvement in receiver sensitivity with OFDM-FSO link as compared to traditional TDM-FSO link.

Keywords

OFDM modulation; error statistics; optical communication; optical links; FSO communication systems; FSO link; Gamma-Gamma distribution; OFDM; SNR; bit-error-rate; optical fiber; receiver sensitivity; secure communication; signal-to-noise ratio; traditional TDM-FSO link; turbulence strength; Bit error rate; Noise; OFDM; Optical fiber communication; Optical receivers; Optical transmitters; Gamma-Gamma distribution; OFDM-FSO; TDM-FSO;

fLanguage

English

Publisher

ieee

Conference_Titel

Broadband and Photonics Conference (IBP), 2015 IEEE International

Conference_Location

Bali

Print_ISBN

978-1-4799-8474-9

Type

conf

DOI

10.1109/IBP.2015.7230767

Filename

7230767