Jia Ye An Li Xi Chen 0018 Lianshan Yan William Shieh Performance improvement in radio-over-fiber transmission using pre-distorted double-sideband signals. 1-3 2013 OFC/NFOEC https://ieeexplore.ieee.org/document/6533094 conf/ofc/2013 db/conf/ofc/ofc2013.html#YeLCYS13