Abstract
Indoor wireless infrared transmission is severely impaired by noise and interference produced by artificial ambient light as well as multipath dispersion. In particular, the interference produced by fluorescent lamps driven by electronic ballasts causes very large power penalties. In this paper spread spectrum techniques are proposed to combat the penalties caused by artificial light interference and multipath dispersion. Analytical, simulation and experimental results of bit error rate versus signal-to-noise ratio are presented for a 1 Mb/s spread spectrum wireless infrared transmission system. The results show that spread spectrum techniques help to ameliorate degradation caused by artificial light interference and multipath dispersion.
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