Title :
Adaptively Modulated OFDM RoF Signals at 60 GHz Over Long-Reach 100-km Transmission Systems Employing Phase Noise Suppression
Author :
Wei, Chia-Chien ; Lin, Chun-Ting ; Chao, Ming-I ; Jiang, Wen-Jr
Author_Institution :
Dept. of Photonics, Nat. Sun Yat-sen Univ., Kaohsiung, Taiwan
Abstract :
We experimentally demonstrated the transmission performance of orthogonal frequency-division-multiplexing (OFDM) signals in a 60-GHz radio-over-fiber system over up to 100-km standard single-mode fiber employing an adaptive bit-loading algorithm. Considering dispersion-induced phase noise, the maximum capacities after different fiber distances are investigated with and without a phase noise suppression (PNS) algorithm for the first time. When a distributed-feedback (DFB) laser with the linewidth of 1.3~4.1 MHz is modulated to carry the radio signals, the PN will result in more than 21.5% capacity decrease after 100-km fiber and 3-m wireless link, and the PNS algorithm which needs no bandwidth-consuming pilot tones can accomplish more than 15.3% capacity increase.
Keywords :
OFDM modulation; adaptive modulation; distributed feedback lasers; interference suppression; phase noise; radio-over-fibre; OFDM; RoF signals; adaptive bit-loading algorithm; adaptive modulation; distance 100 km; distributed feedback laser; frequency 60 GHz; orthogonal frequency division multiplexing; phase noise suppression; radio-over-fiber system; transmission system; wireless link; Bit error rate; Fiber lasers; Modulation; OFDM; Optical fiber communication; Optical fiber dispersion; Optical fibers; Orthogonal frequency-division multiplexing (OFDM); phase noise (PN); radio-over-fiber (RoF);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2011.2172594
