Novel iteration-free blind phase noise estimation for coherent optical OFDM

Ren, Hongliang; Jiaxing, Cai; Lu, Jin; Wen, Hao; Xue, L.; Qin, Yali; Guo, Shuqin; Zhou, Shouli; Hu, Weisheng

doi:10.3788/col201412.120603

Cited by 5 publications

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“…These proposed cost functions have the simple form of a cosine function, and only two or three test phases are required to estimate the phase noise. It is different from the general dispersion minimization method [29]- [31], and the estimate is implemented on a single value rather than any kind of averaging. Subsequent averaging filter performs a suppression of AWGN.…”

Section: Discussionmentioning

confidence: 99%

“…Secondly, a coarse blind phase noise estimation is proposed when the amplitude segmentation and phase rotation are completed for the original received symbols. Inspired by the adaptive phase recovery scheme based on dispersion minimization (DM) [28]- [31], in this paper, a special class of cost functions are constructed elaborately to find the phase estimation, and one of them is represented by Eq. ( 2) or (3),…”

Section: Blind Phase Recovery Scheme For C-mqammentioning

confidence: 99%

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Low-Complexity Blind Carrier Phase Recovery for C-mQAM Coherent Systems

et al. 2019

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A novel carrier phase recovery algorithm is proposed for coherent optical systems with circular multilevel quadrature amplitude modulation (C-mQAM). After amplitude segmentation and phase rotation, the particular distribution of the constellation points in a C-mQAM signal is exploited to construct a special cost function to provide a rough estimate of phase noise. The cost function can be replaced with a simple cosine function, and only two or three test phases are required for the calculation of its parameters. The performances of different cost functions are compared and simulation results show that the cost function can be chosen with the high phase noise tolerance and low computational complexity. Maximum-likelihood phase noise estimation algorithm is combined with the proposed algorithm to mitigate residual phase noise. Compared to the single-stage blind phase search and n-phase-shift keying partitioning algorithms, the numerical results demonstrate that the proposed two-stage algorithm shares similar phase noise tolerance and offers a lower computational complexity for a 28-GBaud back-to-back coherent optical QAM transmission system.

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Section: Discussionmentioning

confidence: 99%

Section: Blind Phase Recovery Scheme For C-mqammentioning

confidence: 99%