Xinying Li Li Tao Junwen Zhang 0001 Yuanquan Wang 0002 Yuan Fang Jiangbo Zhu Yiguang Wang Yufeng Shao Nan Chi Companding transform for PAPR reduction in coherent optical OFDM system. 46-47 2012 WOCC https://doi.org/10.1109/WOCC.2012.6198145 conf/wocc/2012 db/conf/wocc/wocc2012.html#LiTZWFZWSC12