1. Dong Wang, Nianyu Zou, Zhe Kang, Jingjing Liu and Yinghai Zhang, Research on Next-Generation 40 Gbit/s OFDM-PON Employing OOK Modulated Upstream Signals, IET International Conference on Communication Technology and Application, Beijing, 942 (2011).
2. Aftab Hussain, Xin Xiang-jun, Abdul Latif, Ashiq Hussain, Yu Chongxiu, Abid Munir, Yousaf Khan and Muhammad Idrees Afridi, Optoelectronics Letters 8, 468 (2012).
3. Chao Gao, Xiang-jun Xin and Chong-xiu Yu, Optoelectronics Letters 8, 473 (2012).
4. Wang Zhong-peng, Xiao Jiang-nan, Li Fan and Chen Lin, Optoelectronics Letters 7, 363 (2011).
5. Chow C. W., Yeh C. H., Wang C. H., Shih F. Y. and Chi S., Demonstration of Signal Remodulation Long Reach Carrier Distributed Passive Optical Network using OFDM-QAM Signal, European Conference on Optical Communication, Vienna, 1 (2009).