An improved multiplier-free feed-forward carrier phase estimation for dual-polarization QPSK modulation format

Kang-ping Zhong; Tang-jun Li; Nan Jia; Jian Sun; Mu-guang Wang

doi:10.1007/s11801-013-3036-0

Optoelectronics Letters ›› 2013, Vol. 9 ›› Issue (4) : 305-308. DOI: 10.1007/s11801-013-3036-0

Article

An improved multiplier-free feed-forward carrier phase estimation for dual-polarization QPSK modulation format

Kang-ping Zhong13036^,23036^,^a ,
Tang-jun Li13036^,23036 ,
Nan Jia13036^,23036 ,
Jian Sun13036^,23036 ,
Mu-guang Wang13036^,23036

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Abstract

An improved multiplier-free feed-forward carrier phase estimation algorithm is proposed for dual-polarization quadrature-phase-shift-keying (DP-QPSK) with coherent detection. The bit error rate (BER) performance, block length effect and linewidth tolerance of the proposed algorithm are evaluated for a 112 Gbit/s DP-QPSK system. A linewidth symbol duration product of 2.9×10⁻⁴ is demonstrated for 1 dB optical signal-to-noise-ratio (OSNR) penalty at BER of 10⁻³ for the proposed algorithm. The hardware complexity of the proposed multiplier-free algorithm is demonstrated to be much lower than that of the 4th power algorithm.

Keywords

Phase Noise / Carrier Phase / Block Length / Amplify Spontaneous Emission / Hardware Complexity

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Kang-ping Zhong, Tang-jun Li, Nan Jia, Jian Sun, Mu-guang Wang. An improved multiplier-free feed-forward carrier phase estimation for dual-polarization QPSK modulation format. Optoelectronics Letters, 2013, 9(4): 305‒308 https://doi.org/10.1007/s11801-013-3036-0

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This work has been supported by the National Natural Science Foundation of China (No.61275052), the National High-Tech Research and Development Program of China (No.2007AA01Z258), the Fundamental Research Funds for the Central Universities (No.2009YJS005), the Major State Basic Research Development Program of China (No.2010CB328206), and the Beijing Nova Program (No.2008A026).