Fade statistics associated with a space/ground coherent receiver array

Larry C. Andrews; Ronald L. Phillips

doi:10.1117/12.330239

3 November 1998 Fade statistics associated with a space/ground coherent receiver array

Larry C. Andrews, Ronald L. Phillips

Author Affiliations +

Proceedings Volume 3433, Propagation and Imaging through the Atmosphere II; (1998) https://doi.org/10.1117/12.330239
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

Abstract

Laser-satellite communication system are subject to signal fading below a prescribed threshold value owing primarily to optical scintillations associated with the received signal, regardless of pointing in errors. The probability of fade associated with a downlink laser-satellite communication system is calculated here as a function of threshold intensity below the mean intensity of a Gaussian-beam wave incident on a coherent equal-gain (EG) receiver array. Previous theoretical studies and experimental data reveal that the mean carrier-to-noise ratio for an EG array receiver system improves greatly over that of a conventional single aperture monolithic coherent detection system. The present theoretical analysis illustrates there is also a significant decrease in the fractional fade time for an EG optical array receiver system with two or more receivers spatially separated by more than the intensity correlation length of the received optical signal.

Citation Download Citation

Larry C. Andrews and Ronald L. Phillips "Fade statistics associated with a space/ground coherent receiver array", Proc. SPIE 3433, Propagation and Imaging through the Atmosphere II, (3 November 1998); https://doi.org/10.1117/12.330239

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