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- W2091087886 abstract "In some applications of optical communication systems, such as satellite optical communication and atmospheric opticalcommunication, the optical beam wanders on the detector surface due to vibration and turbulence effects, respectively. Thewandering of the beam degrades the communication system performance. In this research, we derive a mathematical modelof an optical communication system with a detection matrix to improve the system performance for direct detection pulseposition modulation (PPM) We include a centroid tracker in the communication system model. The centroid tracker tracksthe center of the beam. Using the position of beam center and an apriori model of beam spreading we estimate the opticalpower on each pixel (element) in the detection matrix. Based on knowledge of the amplitudes of signal and noise in eachpixel, we tune adaptively and separately the gain of each individual pixel in the detection matrix for communication signals.Tuning the gain is based on the mathematical model derived in this research. This model is defined as suboptimal due tosome approximations in the development and is a suboptimum solution to the optimization problem of n multiplied by mfree variables, where U,mare the dimensions of the detection matrix. Comparison is made between the adaptive suboptimummodel and the standard model. From the mathematical analysis and the results of the comparison it is clear that this modelimproves significantly communication system performance." @default.
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- W2091087886 date "1997-10-17" @default.
- W2091087886 modified "2023-09-23" @default.
- W2091087886 title "Adaptive suboptimum detection of optical PPM signal with detection matrix and centroid tracking" @default.
- W2091087886 doi "https://doi.org/10.1117/12.283876" @default.
- W2091087886 hasPublicationYear "1997" @default.
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