Evaluation of Performance of Is-OWC OFDM System with Spatial Diversity

Khichar, Sunita; Inaniya, Pawan Kumar

doi:10.1007/978-981-15-2926-9_6

Cited by 2 publications

(2 citation statements)

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“…Moreover, a CO-OFDM-FSO scheme with quadrature amplitude modulation (QAM) signals has been proposed to significantly improve the transmission distance and data rate [13]. Furthermore, CO-OFDM with an optical receiving antenna array has been numerically predicted to realize a 20 Gbit/s FSO communication over 4500 km [16]. Diversity technologies, including spatial diversity, temporal diversity, polarization diversity, and wavelength diversity (or frequency diversity), are widely utilized to increase receiver sensitivity [17].…”

Section: System Structure and Channel Modelmentioning

confidence: 99%

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Performance Improvement of the Free-Space Optical Communication Link Using Spatial Diversity Reception-Assisted OFDM Signals

et al. 2022

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Orthogonal frequency division multiplexing (OFDM) technology is presented for use in free-space optical (FSO) communications accompanied by the spatial diversity reception. Using quadrature phase shift keying (QPSK) modulation formats, the OFDM signals show robustness to support high spectral efficiency and compatibility with the spatial diversity reception to improve receiver sensitivity. Compared with the single-carrier QPSK signal, the OFDM-QPSK signal with 64 sub-carriers can reduce the BER from 2.87 × 10−3 to 2.98 × 10−4 at the SNR of 6 dB. Using a two-aperture spatial diversity reception with OFDM, the BER can be reduced from 2.45 × 10−3 of a single receiver to 6.10 × 10−4 under moderate turbulence conditions. Under strong turbulence, the BER of the single receiver is 2.14 × 10−2. It can be improved to 1.16 × 10−3 by using four-aperture receivers, and even 6.87 × 10−4 by using six-aperture receivers. The optimized aperture number should be selected according to channel conditions.

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Section: System Structure and Channel Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%