Chinese Optics Letters, 2013, 11 (6): 060602, Published Online: May. 31, 2013
Enhanced fourth-power algorithm for phase estimation with frequency separation in direct-detection optical OFDM systems Download: 668次
060.0060 Fiber optics and optical communications 060.2330 Fiber optics communications 060.5060 Phase modulation
Abstract
The optical orthogonal frequency division multiplexing (OFDM) signal is affected by impairments introduced by electrical filters and optical chromatic dispersion. An enhanced fourth-power algorithm for phase estimation with frequency separation is used to estimate and compensate the phase rotation of OFDM subcarriers. The performance of the proposed phase estimation algorithm is evaluated on a 4-Gb/s OFDM signal at different frequencies. Experimental results using the proposed algorithm show a 1.8-dB received power sensitivity improvement at a bit error rate of 1×10-4 after a 100-km standard single-mode fiber transmission, compared with the conventional technique.
Min Kong, Jiangnan Xiao, Ze Dong, Liuqingqing Yang, Lin Chen, Jianjun Yu. Enhanced fourth-power algorithm for phase estimation with frequency separation in direct-detection optical OFDM systems[J]. Chinese Optics Letters, 2013, 11(6): 060602.