Optical fiber based on wireless scheme for wideband multimedia access
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United States of America Patent
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-
May 3, 2005
Grant Date -
Apr 24, 2003
app pub date -
Apr 29, 2002
filing date -
Jun 28, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A Fiber-wireless uplink consists of a wireless channel followed by a radio-over-fiber (ROF) link. Typically, nonlinear distortion of the ROF link is the major concern when the radio frequency is only a few GHz. This especially severe in the uplink, because of the multipath fading of the wireless channel. A Hammerstein type decision feedback equalizer is described for the fiber wireless uplink, that compensates for nonlinear distortion of the ROF link as well as linear dispersion of the wireless channel. Since the linear and nonlinear parts of the receiver are separated, tracking the fast changing wireless channel is virtually independent of compensating for the relatively static nonlinearity. Analytical results show that the receiver provides excellent compensation with notably less complexity.
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