Performance of Multibeam Very High Throughput Satellite Systems Based on FSO Feeder Links With HPA Nonlinearity

Due to recent advances in laser satellite communications technology, free-space optical (FSO) links are presented as an ideal alternative to the conventional radio frequency (RF) feeder links of the geostationary satellite for next generation very high throughput satellite (VHTS) systems. In this pa...

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Bibliographic Details
Published in:IEEE transactions on wireless communications Vol. 19; no. 9; pp. 5908 - 5923
Main Authors: Zedini, Emna, Kammoun, Abla, Alouini, Mohamed-Slim
Format: Journal Article
Language:English
Published: New York IEEE 01.09.2020
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
atmospheric turbulence
beam wander
Bit error rate
Bivariate analysis
free-space optical (FSO) feeder links
Free-space optical communication
Frequency reuse
high-power amplifier (HPA)
Laser beams
Links
Nonlinear systems
Nonlinearity
Optical beams
Optical fiber communication
pointing errors
Power amplifiers
Probability distribution functions
Radio frequency
Satellite broadcasting
Satellite communications
Satellites
Signal to noise ratio
solid state power amplifier (SSPA)
Statistical analysis
Synchronous satellites
Throughput
traveling wave tube amplifier (TWTA)
Very high throughput satellite (VHTS) systems
ISSN:1536-1276, 1558-2248
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Summary:Due to recent advances in laser satellite communications technology, free-space optical (FSO) links are presented as an ideal alternative to the conventional radio frequency (RF) feeder links of the geostationary satellite for next generation very high throughput satellite (VHTS) systems. In this paper, we investigate the performance of multibeam VHTS systems that account for nonlinear high power amplifiers at the transparent fixed gain satellite transponder. Specifically, we consider the forward link of such systems, where the RF user link is assumed to follow the shadowed Rician model and the FSO feeder link is modeled by the Gamma-Gamma distribution in the presence of beam wander and pointing errors where it operates under either the intensity modulation with direct detection or the heterodyne detection. Moreover, zero-forcing precoder is employed to mitigate the effect of inter-beam interference caused by the aggressive frequency reuse in the user link. The performance of the system under study is evaluated in terms of the outage probability, the average bit-error rate (BER), and the ergodic capacity that are derived in exact closed-forms in terms of the bivariate Meijer's G function. Simple asymptotic results for the outage probability and the average BER are also obtained at high signal-to-noise ratio.
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ISSN:1536-1276
1558-2248
DOI:10.1109/TWC.2020.2998139