25 September 2013 Prototyping FM data demodulation in free-space optical communication systems using discrete wavelet transformation
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Abstract
Free-Space Optical (FSO) communications is a vital area of research due to its important advantages of providing a very large bandwidth and relatively low cost of implementation. One of the inherent limitations on the quality of an FSO communication link is the degradation of the received beam due to atmospheric turbulence. This paper is concerned with prototyping a wavelet-based algorithm to remove or reduce the effect of the scintillation noise and other unwanted signal on an FSO link that uses analog frequency modulation. The applicability of these concepts will be demonstrated by providing a real-time prototype using reconfigurable hardware, namely Field Programmable Gate Arrays (FPGA), and high-level design tools such as System Generator for DSP from Xilinx. Our proposed prototype was realized on the Virtex-6 FPGA ML605 board using the XC6VLX240T-1FFG1156 device.
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Lan Tran, Esam El-Araby, Nader Namazi, "Prototyping FM data demodulation in free-space optical communication systems using discrete wavelet transformation", Proc. SPIE 8874, Laser Communication and Propagation through the Atmosphere and Oceans II, 887412 (25 September 2013); doi: 10.1117/12.2025201; https://doi.org/10.1117/12.2025201
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