Narrowband optical filtering for background-limited photon-counting free-space optical communications

2019 ◽  
Author(s):  
Katia Shtyrkova ◽  
Igor Gaschits ◽  
David O. Caplan
Keyword(s):  
Optical Communications ◽  
Free Space ◽  
Photon Counting ◽  
Free Space Optical ◽  
Optical Filtering

scholarly journals Signal Acquisition with Photon-Counting Detector Arrays in Free-Space Optical Communications

2019 ◽  
Author(s):  
Muhammad Bashir ◽  
Mohamed-Slim Alouini
Keyword(s):  
False Alarm ◽  
Optical Communications ◽  
Upper Bound ◽  
Free Space ◽  
Photon Counting ◽  
Acquisition Time ◽  
Beam Radius ◽  
Free Space Optical ◽  
Detector Arrays ◽  
Photon Counting Detector

Pointing and acquisition are an important aspect of free-space optical communications because of the narrow beamwidth associated with the optical signal. In this paper, we have analyzed the pointing and acquisition problem in free-space optical communications for photon-counting detector arrays and Gaussian beams. In this regard, we have considered the maximum likelihood detection for detecting the location of the array, and analyzed the one-shot probabilities of missed detection and false alarm using the scaled Poisson approximation. Moreover, the upper/lower bounds on the probabilities of missed detection and false alarm for one complete scan are also derived, and these probabilities are compared with Monte Carlo approximations for a few cases. Additionally, the upper bounds on the acquisition time and the mean acquisition time are also derived. The upper bound on mean acquisition time is minimized numerically with respect to the beam radius for a constant signal-to-noise ratio scenario. Finally, the complementary distribution function of an upper bound on acquisition time is also calculated in a closed form. Our study concludes that an array of smaller detectors gives a better acquisition performance (in terms of acquisition time) as compared to one large detector of similar dimensions as the array. <br>

scholarly journals Signal Acquisition with Photon-Counting Detector Arrays in Free-Space Optical Communications

2019 ◽  
Author(s):  
Muhammad Bashir ◽  
Mohamed-Slim Alouini
Keyword(s):  
False Alarm ◽  
Optical Communications ◽  
Upper Bound ◽  
Free Space ◽  
Photon Counting ◽  
Acquisition Time ◽  
Beam Radius ◽  
Free Space Optical ◽  
Detector Arrays ◽  
Photon Counting Detector

Pointing and acquisition are an important aspect of free-space optical communications because of the narrow beamwidth associated with the optical signal. In this paper, we have analyzed the pointing and acquisition problem in free-space optical communications for photon-counting detector arrays and Gaussian beams. In this regard, we have considered the maximum likelihood detection for detecting the location of the array, and analyzed the one-shot probabilities of missed detection and false alarm using the scaled Poisson approximation. Moreover, the upper/lower bounds on the probabilities of missed detection and false alarm for one complete scan are also derived, and these probabilities are compared with Monte Carlo approximations for a few cases. Additionally, the upper bounds on the acquisition time and the mean acquisition time are also derived. The upper bound on mean acquisition time is minimized numerically with respect to the beam radius for a constant signal-to-noise ratio scenario. Finally, the complementary distribution function of an upper bound on acquisition time is also calculated in a closed form. Our study concludes that an array of smaller detectors gives a better acquisition performance (in terms of acquisition time) as compared to one large detector of similar dimensions as the array. <br>

Channel Characterization for Free-Space Optical Communications

2012 ◽  
Author(s):  
L. C. Andrews ◽  
R. L. Phillips ◽  
R. Crabbs ◽  
T. Leclerc ◽  
P. Sauer
Keyword(s):  
Optical Communications ◽  
Free Space ◽  
Free Space Optical ◽  
Channel Characterization
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