Performance Analysis of DCO-OFDM in Modulated Retro-reflector Optical Communication over Weak Turbulence

doi:10.3969/j.issn.1000-1093.2020.07.014

Abstract

Abstract: The retro-reflect modulator of micro-electro-mechanical system has low modulation rate and limited linear region. To improve the transmission rate effectively, a symmetry clipped DC-biased optical orthogonal frequency division multiplexing (DCO-OFDM) is proposed in the light of DCO-OFDM characteristic. The nonlinear distortion caused by double clipping is modeled as clipping noise, and the effective signal-to-noise ratio function is derived. the theoretical average bit error rate of the double clipping DCO-OFDM of modulated retro-reflector optical communication system in weak turbulence under special communication conditions like ground-ground and air-air is studied and simulated using Monte Carlo method, and the effect of direct current (DC) bias on the performance of symmetric clipping is analyzed. The simulated results show that the effective signal-to-noise ratio increases first and then decreases as the DC bias increases at better optical power. Small DC bias will cause severe clipping noise, thus limiting the change of effective signal-to-noise ratio with optical power. Key

Key words: opticalcommunication, modulatedretro-reflector, weakturbulence, DC-biasedopticalorthogonalfrequencydivisionmultiplexing, signal-to-noiseratio, clipping, averagebiterrorrate

CLC Number:

TN929.12

TANG Fang, XU Zhiyong, WANG Jingyuan, ZHAO Jiyong, LI Jianhua. Performance Analysis of DCO-OFDM in Modulated Retro-reflector Optical Communication over Weak Turbulence[J]. Acta Armamentarii, 2020, 41(7): 1368-1374.

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第41卷第7期2020 年7月
兵工学报ACTA ARMAMENTARII
Vol.41No.7Jul.2020

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