Title :
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
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;
Conference_Titel :
Broadband and Photonics Conference (IBP), 2015 IEEE International
Conference_Location :
Bali
Print_ISBN :
978-1-4799-8474-9
DOI :
10.1109/IBP.2015.7230767
