Abstract
We propose and experimentally demonstrate a simple, low-cost optical
ultra-wide band (UWB) pulse generation method. A gain-switched laser pulse
is dispersed by optical fiber propagation and upconverted to the center of
the US Federal Communications Commission (FCC) mask using an optical
intensity modulator. The generated UWB pulses comply with the FCC mask with
relatively high power efficiencies. We also show that the optical fiber can
be replaced with a fiber Bragg grating filter to make the transmitter
compact. Wireless propagation of the UWB impulses is investigated by offline
signal processing. A linear receiver and an energy detector are implemented.
The linear filter shows a better BER performance, particularly in worse
channel conditions. We reach the FEC limit of 10<sup>-3</sup> after 3.5 m of wireless propagation at 856 Mb/s.
© 2011 IEEE
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