Real-Time 10.4-Gb/s Single-Band Optical 256/64/16QAM Receiver for OFDM-PON

In this letter, a 10.4-Gb/s real-time baseband orthogonal frequency division multiplexing (OFDM) receiver utilizing 256/64/16-quadrature amplitude modulation (QAM) adaptive modulation format, incorporating several key functionalities, including symbol synchronization, channel equalization, as well as sampling clock frequency synchronization is successfully implemented using a commercial field programmable gate array chip and a sample rate of 5-GS/s analog-to-digital converter. The performance of the real-time baseband OFDM receiver is experimentally investigated in an intensity-modulation and direct-detection optical communication system. The offline generated 10.4-Gb/s adaptively modulated 256/64/16QAM encoded optical OFDM signal with a high spectral efficiency of 4.84 bit/s/Hz can be successful transmitted over 20-km standard single mode fiber with a bit error rate <;3.8 × 10-3. In addition, the frame miss probability is real-time measured in the receiver to obtain an optimal threshold value for the symbol synchronization.

[1]  Junqiang Hu,et al.  41.25 Gb/s real-time OFDM receiver for variable rate WDM-OFDMA-PON transmission , 2010, 2010 Conference on Optical Fiber Communication (OFC/NFOEC), collocated National Fiber Optic Engineers Conference.

[2]  Lin Chen,et al.  Symbol synchronization and sampling frequency synchronization techniques in real-time DDO-OFDM systems , 2014 .

[3]  R P Giddings,et al.  Real-time demonstration of 128-QAM-encoded optical OFDM transmission with a 5.25bit/s/Hz spectral efficiency in simple IMDD systems utilizing directly modulated DFB lasers. , 2009, Optics express.

[4]  R P Giddings,et al.  Record-high and robust 17.125 Gb/s gross-rate over 25 km SSMF transmissions of real-time dual-band optical OFDM signals directly modulated by 1 GHz RSOAs. , 2014, Optics express.

[5]  Xinying Li,et al.  Real-time Demonstration of DMT-based DDO-OFDM Transmission and Reception at 50Gb/s , 2013 .

[6]  Po L. Tien,et al.  Next-generation OFDMA-based passive optical network architecture supporting radio-over-fiber , 2010, IEEE Journal on Selected Areas in Communications.

[7]  Jing He,et al.  Real-time optical OFDM long-reach PON system over 100 km SSMF using a directly modulated DFB laser , 2014, IEEE/OSA Journal of Optical Communications and Networking.

[8]  Seung Il Myong,et al.  Demonstration of a real-time 16 QAM encoded 11.52 Gb/s OFDM transceiver for IM/DD OFDMA-PON systems , 2013, 2013 18th OptoElectronics and Communications Conference held jointly with 2013 International Conference on Photonics in Switching (OECC/PS).

[9]  Lin Chen,et al.  Demonstration of DFT-spread 256QAM-OFDM signal transmission with cost-effective directly modulated laser. , 2014, Optics express.

[10]  R Bouziane,et al.  Experimental demonstration of 30 Gb/s direct-detection optical OFDM transmission with blind symbol synchronisation using virtual subcarriers. , 2014, Optics express.

[11]  Jianxin Ma,et al.  Simple signal-to-signal beat interference cancellation receiver based on balanced detection for a single-sideband optical OFDM signal with a reduced guard band. , 2013, Optics letters.