Chinese Optics Letters, Volume. 11, Issue 8, 080602(2013)
Performance comparison of power fading mitigation techniques in multiband OFDM-UWB signals transmission along LR-PONs
The single sideband (SSB) modulation is assessed as a means to mitigate the dispersion-induced power fading on the distribution of ortogonal frequency division multiplexing (OFDM) ultra wideband (UWB) radio signals along long-reach passive optical networks (LR-PONs). Particularly, two different SSB architectures, namely, Sieben's architecture and four phase modulator (FPM) architecture are optimized to provide maximum sideband suppression. The minimum optical signal-to-noise ratio (OSNR) required to simultaneously distribute all the 14 OFDM-UWB sub-bands along the LR-PON distances ranging between 80 and 100 km is also evaluated through numerical simulation. FPM architecture is preferable over Sieben's architecture because the latter SSB architecture generates carriers-carriers beat term at the photodetector output with high power, thereby causing significant degradation in the OFDM-UWB sub-bands with lower central frequencies. The simultaneous distribution of the 14 SSB OFDM-UWB sub-bands in the LR-PON using the FPM architecture shows a minimum OSNR penalty of 3 dB compared with the centralized dispersion compensation technique.
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Tiago M., Adolfo V.. Performance comparison of power fading mitigation techniques in multiband OFDM-UWB signals transmission along LR-PONs[J]. Chinese Optics Letters, 2013, 11(8): 080602
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Received: Feb. 15, 2013
Accepted: Apr. 12, 2013
Published Online: Aug. 6, 2013
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