TY - JOUR
T1 - Free-Space Optical MISO Communications with an Array of Detectors
AU - Bashir, Muhammad Salman
AU - Alouini, Mohamed Slim
N1 - Funding Information:
This work was supported by the Office of Sponsored Research (OSR) at King Abdullah University of Science and Technology (KAUST).
Publisher Copyright:
© 2020 IEEE.
PY - 2020/12/1
Y1 - 2020/12/1
N2 - Multiple-input multiple-output (MIMO) and multiple-input single-output (MISO) schemes have yielded promising results in free space optical (FSO) communications by providing diversity against fading of the received signal intensity. In this article, we have analyzed the probability of error performance of a muliple-input single-output (MISO) free-space optical channel that employs array(s) of detectors at the receiver. In this regard, we have considered the maximal ratio combiner (MRC) and equal gain combiner (EGC) fusion algorithms for the array of detectors, and we have examined the performance of these algorithms subject to phase and pointing errors for strong atmospheric turbulence conditions. It is concluded that when the variance of the phase and pointing errors are below certain thresholds, signal combining with a single array of detectors yields significantly better performance than a multiple arrays receiver. In the final part of the paper, we examine the probability of error of the single detector array receiver as a function of the beam radius, and the probability of error is minimized by (numerically) optimizing the beam radius of the received signal beams.
AB - Multiple-input multiple-output (MIMO) and multiple-input single-output (MISO) schemes have yielded promising results in free space optical (FSO) communications by providing diversity against fading of the received signal intensity. In this article, we have analyzed the probability of error performance of a muliple-input single-output (MISO) free-space optical channel that employs array(s) of detectors at the receiver. In this regard, we have considered the maximal ratio combiner (MRC) and equal gain combiner (EGC) fusion algorithms for the array of detectors, and we have examined the performance of these algorithms subject to phase and pointing errors for strong atmospheric turbulence conditions. It is concluded that when the variance of the phase and pointing errors are below certain thresholds, signal combining with a single array of detectors yields significantly better performance than a multiple arrays receiver. In the final part of the paper, we examine the probability of error of the single detector array receiver as a function of the beam radius, and the probability of error is minimized by (numerically) optimizing the beam radius of the received signal beams.
KW - Array of detectors
KW - beam radius
KW - equal gain combiner
KW - maximal ratio combiner
KW - multiple-input single-output
KW - pointing error
KW - strong atmospheric turbulence
UR - http://www.scopus.com/inward/record.url?scp=85120486246&partnerID=8YFLogxK
U2 - 10.1109/OJCOMS.2020.3035600
DO - 10.1109/OJCOMS.2020.3035600
M3 - Article
AN - SCOPUS:85120486246
VL - 1
SP - 1765
EP - 1780
JO - IEEE Open Journal of the Communications Society
JF - IEEE Open Journal of the Communications Society
SN - 2644-125X
M1 - 9247124
ER -