Performance Enhancement of Atmospheric Coherent Optical Communication Systems Using DPSK

Abstract:

A coherent DPSK transmission system is presented to improve the receiver sensitivity for free space optical (FSO) communication. The coherent DPSK is an effective way to overcome the atmospheric turbulence. The eye diagram and bit error rate (BER) of the system are got by the simulation. Results show that with the coherent reception method, coherent DPSK offers improved signal-to-noise ratio (SNR) performance compared to the DPSK without coherent and OOK format. And hence it can be effective to overcome the signal impairment caused by atmospheric turbulence. It is shown that the sensitivity of the system employing coherent DPSK is 3dB better than a comparable system using DPSK without coherent and 9dB better than a system using OOK.

• Periodical: Applied Mechanics and Materials (Volumes 263-266)
• Pages: 1081-1084
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.263-266.1081
• Online since: December 2012
• Authors: Yu Peng Li, Yan Gan Zhang, Xue Guang Yuan, Jin Nan Zhang, Ming Lun Zhang, Yong Qing Huang
• Keywords: Atmospheric, Coherent, DPSK, Turbulence

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