Enhanced fourth-power algorithm for phase estimation with frequency separation in direct-detection optical OFDM systems

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2013,（6）
• 页码范围: 10-15
• 页数: 6页
• 语种: 英文
• DOI: 10.3788/COL201311.060602

摘要

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.