Performance comparison of power fading mitigation techniques in multiband OFDM-UWB signals transmission along LR-PONs

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2013,（8）
• 页码范围: 18-23
• 页数: 6页
• 语种: 英文
• DOI: 10.3788/COL201311.080602

摘要

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.