Title :
Green, elastic coherent IFDMA-PON for next-generation access network
Author :
Kitayama, Ken-ichi ; Yoshida, Yuki ; Maruta, Akihiro
Author_Institution :
Dept. of Electr., Electron. & Inf. Eng., Osaka Univ., Suita, Japan
Abstract :
In this talk, our recent R&D activities a green, elastic next-generation (NG) access network based upon coherent interleaved-frequency division multiple access (IFDMA), a special class of OFDMA will be presented. Conventional OFDMA systems require power-consuming IFFT in the transmitter. It will be shown that “Green” can be realized in the generation of IFDMA signals by replacing the IFFT circuit with a simplified subcarrier mapping circuit. “Elastic” bandwidth provisioning will be demonstrated by the uplink experiment of dynamic allocation on-demand of 20 Gbps-QPSK and 30 Gbps-8 PSK signals to two ONUs. In addition, the carrier synchronization technique of the uplink between multiple ONUs by using DSP-based low-complexity carrier frequency offset (CFO) pre-compensation will be discussed.
Keywords :
OFDM modulation; fast Fourier transforms; frequency division multiple access; next generation networks; passive optical networks; quadrature phase shift keying; radio transmitters; subscriber loops; synchronisation; DSP-based low-complexity carrier frequency offset; OFDMA systems; QPSK signals; bit rate 20 Gbit/s; bit rate 30 Gbit/s; carrier synchronization; dynamic allocation; elastic bandwidth provisioning; elastic coherent IFDMA-PON; elastic next-generation access network; green access network; interleaved-frequency division multiple access; power-consuming IFFT; pre-compensation; subcarrier mapping circuit; transmitter; two ONU; Bandwidth; Next generation networking; OFDM; Optical network units; Optical transmitters; Passive optical networks; communications; digital coherent communications; elastic bandwidth provisioning; fiber optics; interleaved-frequency division multiple access (IFDMA); next-generation passive optical network (PON);
Conference_Titel :
Transparent Optical Networks (ICTON), 2012 14th International Conference on
Conference_Location :
Coventry
Print_ISBN :
978-1-4673-2228-7
Electronic_ISBN :
2161-2056
DOI :
10.1109/ICTON.2012.6253711
