Abstract
Distribution of wireless communication signals over implemented optical networks is a challenged task since the presence of wireless services may affect the performance of the existing wired ones. This paper addresses the possibility of integrating impulse radio-ultrawideband (IR-UWB) wireless services into implemented coherent optical orthogonal frequency division multiplexing (CO-OFDM) network. Simulation results are presented for the transmission of a 625Mb/s UWB  signal with either 50Gb/s single-channel or three-channel OFDM system. Both Gaussian monocycle and 5th-order derivative Gaussian pulses are used to implement  the UWB system with two modulation formats, namely ON-OFF keying (OOK) and biphase modulation (BPM). The simulation results reveal that the performance of the CO-OFDM channels is not affected in the presence of UWB signals.
Highlights
Impulse radio-ultrawideband (IR-UWB) signals are considered the most promising schemes for generation short-rang broadband wireless communication and sensor networks [1,2]
Several proposals have been reported in the literature to integrate UWB services into wavelength division multiplexing-passive optical network (WDM-PON) to provide high order data-rate and flexible wired and wireless services with a favorable cost [6,7,8]
Advanced signal processing and high-order modulation formats are the key technology to increase the spectral efficiency in these advanced optical communication systems [10,11]
Summary
Impulse radio-ultrawideband (IR-UWB) signals are considered the most promising schemes for generation short-rang broadband wireless communication and sensor networks [1,2]. The simulation results reveal that CO-OFDM system under investigation can offer a received a BER less than 10-9 when the length of the transmission link is less than 1344 km. Investigating this figure reveals that there is a frequency guard between the UWB and OFDM spectrum. Results related to BERs corresponding to the transmission of UWB signals alone over the fiber are given in the table. These results are used to calculate Figure of Degradation (FoD). BERn >1 (i.e., FoD > 0) indicates that the performance of the received channel in WDM system is degraded compared with the single-channel system
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