Performance of DPSK free-space optical communication with spatial diversity

The performance of satellite-to-ground downlink optical communications over Gamma-Gamma distributed atmospheric turbulence are discussed for a direct detection differential phase shift keying system with spatial diversity, which combines the beam coherently before demodulation. Bit-error rate (BER) performances for various numbers of apertures are analyzed and compared for different zenith angle. We also consider the effect of the fiber coupling efficiency and loss ratio of beam coupler to the final BER. The results of numerical simulation shows that the advantage increases with the number of aperture. All the numerical results are verified by Monte-Carlo simulations.

[1]  W. Leeb,et al.  Fiber coupling efficiency for random light and its applications to lidar. , 1998, Optics letters.

[2]  Vincent W. S. Chan,et al.  Coherent Optical Communication over the Turbulent Atmosphere with Spatial Diversity and Wavefront Predistortion , 2009, GLOBECOM 2009 - 2009 IEEE Global Telecommunications Conference.

[3]  L. Andrews,et al.  Laser Beam Propagation Through Random Media , 1998 .

[4]  Xiang Liu,et al.  Differential phase-shift keying for high spectral efficiency optical transmissions , 2004, IEEE Journal of Selected Topics in Quantum Electronics.

[5]  Julian Cheng,et al.  Coherent free-space optical transmission with diversity combining for Gamma-Gamma atmospheric turbulence , 2010, 2010 25th Biennial Symposium on Communications.

[6]  Jeffrey H. Shapiro,et al.  Wireless optical communications via diversity reception and optical preamplification , 2005, IEEE Transactions on Wireless Communications.

[7]  V. Carrozzo,et al.  Optical Intersatellite System Based on DPSK Modulation , 2005, 2005 2nd International Symposium on Wireless Communication Systems.

[8]  Walter R. Leeb,et al.  Experimental demonstration of a self-tracking 16-aperture receiver telescope array for laser intersatellite communications , 1998, Photonics West.

[9]  Jing Ma,et al.  Performance analysis of satellite-to-ground downlink coherent optical communications with spatial diversity over Gamma-Gamma atmospheric turbulence. , 2015, Applied optics.

[10]  Etty J. Lee,et al.  Part 1: optical communication over the clear turbulent atmospheric channel using diversity , 2004, IEEE Journal on Selected Areas in Communications.

[11]  Mohsen Kavehrad,et al.  BER Performance of Free-Space Optical Transmission with Spatial Diversity , 2007, IEEE Transactions on Wireless Communications.

[12]  Zabih Ghassemlooy,et al.  BPSK Subcarrier Intensity Modulated Free-Space Optical Communications in Atmospheric Turbulence , 2009, Journal of Lightwave Technology.