Abstract
In this paper, we comprehensively review our research work on system
wide implementation of photonically generated IR-UWB signals based on relaxation
oscillations of a semiconductor laser. Firstly, we present our novel approach
as a flexible method for photonic generation of high speed impulse radio ultra-wideband
(IR-UWB) signals at 781.25 Mbps with on-off keying (OOK) and binary phase
shift keying (BPSK) modulation formats. We further advance the state-of-the-art
to include multi-Gigabit IR-UWB signal generation. Both OOK and BPSK signals
comply with the Federal Communications Commission (FCC) regulation. Secondly,
we implement UWB fiber transmission systems and study hybrid fiber-wireless
transmission performance at a system level. This is accomplished by employing
our digital signal processing (DSP) assisted receiver. The photonic generation
method is superior to the state-of-the-art electronic generation method in
terms of transmission bit-error rate performance. Moreover, photonic IR-UWB
generation is shown to be capable of longer wireless reach due to its lower
bandwidth limitation. Finally, we experimentally demonstrate the integration
of a relaxation oscillations-based UWB photonic generation system into existing
wavelength division multiplexing passive optical networks (WDM-PON) infrastructure.
This provides converged Gigabit indoor wireless and wireline access services.
© 2012 IEEE
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