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

作　　者：Tiago M.F.Alves Adolfo V.T.Cartaxo 

机构地区：[1]Instituto de Telecomunicacoes,Department of Electrical and Computer Engineering,Instituto Superior T'ecnico,Technical University of Lisbon

出　　处：《Chinese Optics Letters》2013年第8期18-23,共6页中国光学快报（英文版）

基　　金：supported by Fundacao para a Cienciae a Tecnologia from Portugal under contract SFRH/BD/29871/2006; the project TURBO-PTDC/EEA-TEL/104358/2008;supported in part by the European FIVER-FP7-ICT-2009-4-249142 project

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 ar- chitectures, 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 dis- persion compensation technique.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 ar- chitectures, 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 dis- persion compensation technique.

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

分 类 号：TN919.3[电子电信—通信与信息系统]