Single subcarrier gold sequences modulated timing synchronization for upstream OFDMA-PON

We propose a symbol synchronization scheme based on Gold sequences modulated on a single pilot subcarrier for the OFDMA-PON. The IMDD real-time experimental demonstrations are carried out with two ONUs and one OLT. The results show that the accurate symbol synchronization can be achieved at received optical power of −21dBm on the condition of SFO range from 0ppm to 70ppm between two ONUs.

[1]  W. Rosenkranz,et al.  Experimental demonstration of OFDMA-PON uplink-transmission with four individual ONUs , 2013, 2013 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference (OFC/NFOEC).

[2]  Werner Rosenkranz,et al.  Asynchronous Signal Reception in OFDMA-PON-Uplink , 2013 .

[3]  Yong-Hwan Lee,et al.  Sequence acquisition of DS-CDMA systems employing Gold sequences , 2000, IEEE Trans. Veh. Technol..

[4]  Frank Schaich,et al.  An OFDMA-based optical access network architecture exhibiting ultra-high capacity and wireline-wireless convergence , 2012, IEEE Communications Magazine.

[5]  Werner Rosenkranz,et al.  37.5 km urban field trial of OFDMA-PON using colorless ONUs with dynamic bandwidth allocation and TCM [invited] , 2015, IEEE/OSA Journal of Optical Communications and Networking.

[6]  E. Hugues-Salas,et al.  First real-time experimental demonstrations of 11.25Gb/s optical OFDMA PONs with adaptive dynamic bandwidth allocation. , 2011, Optics express.

[7]  Werner Rosenkranz,et al.  Timing Advance Tracking for Coherent OFDMA-PON Upstream System , 2013 .

[8]  Werner Rosenkranz,et al.  Initial ranging scheme based on interpolated Zadoff-Chu sequences for OFDMA-PON. , 2014, Optics express.

[9]  Chen Qian,et al.  A Symbol Synchronization Method Based on Gold Sequences for Real-time Upstream OFDMA-PON , 2015 .

[10]  Qianwu Zhang,et al.  Low-complexity joint symbol synchronization and sampling frequency offset estimation scheme for optical IMDD OFDM systems. , 2016, Optics express.