Performance Analysis of Heterodyne-Detected OCDMA Systems Using PolSK Modulation over a Free-Space Optical Turbulence Channel

Electronics

Fan Bai²  Yuwei Su¹  Takuro Sato² 

[1] Department of Communications and Computer Engineering, Waseda University, 66 bldg., 3-14-9 Ookubo, Shinjuku-ku, Tokyo, Japan; E-Mail:;Graduate School of Global Information and Telecommunication Studies, Waseda University, 66 bldg., 3-14-9 Ookubo, Shinjuku-ku, Tokyo, Japan; E-Mail:

关键词: polarization modulation;    optical CDMA (OCDMA);    free-space optical (FSO);    heterodyne detection;    gamma-gamma turbulence model;   

DOI  :  10.3390/electronics4040785

来源: mdpi

【 摘 要 】

This paper presents a novel model of heterodyne-detected optical code-division multiple-access (OCDMA) systems employing polarization shift keying (PolSK) modulation over a free-space optical (FSO) turbulence channel. In this article, a new transceiver configuration and detailed analytical model for the proposed system are provided and discussed, taking into consideration the potential of heterodyne detection on mitigating the impact of turbulence-induced irradiance fluctuation on the performance of the proposed system under the gamma-gamma turbulence channel. Furthermore, we derived the closed-form expressions for the system error probability and outage probability, respectively. We determine the advantages of the proposed modeling by performing a comparison with a direct detection scheme obtained from an evaluation of link performance under the same environment conditions. The presented work also shows the most significant impact factor that degrades the performance of the proposed system and indicates that the proposed approach offers an optimum link performance compared to conventional cases.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.