An Analysis on the Coverage Distance of LDPC-Coded Free-Space Optical Links
AdvisorBorah, Deva K.
AffiliationNew Mexico State University
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AbstractWe design irregular Low-Density Parity-Check (LDPC) codes for free-space optical (FSO) channels for different transmitter-receiver link distances and analyze the error performance for different atmospheric conditions. The design considers atmospheric absorption, laser beam divergence, and random intensity fluctuations due to atmospheric turbulence. It is found that, for the same transmit power, a system using the designed codes works over much longer link distances than a system that employs regular LDPC codes. Our analysis is particularly useful for portable optical transceivers and mobile links.
SponsorsInternational Foundation for Telemetering