Vertical blind phase search for low-complexity carrier phase recovery of offset-QAM Nyquist WDM transmission

被引：10

作者：

Lu, Jianing ^{[1
]}

Fu, Songnian ^{[1
]}

Tang, Haoyuan ^{[1
]}

Xiang, Meng ^{[1
]}

Tang, Ming ^{[1
]}

Liu, Deming ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Sch Opt & Elect Informat, Natl Engn Lab Next Generat Internet Access Syst, Wuhan 430074, Peoples R China

来源：

OPTICS COMMUNICATIONS | 2017年 / 382卷

基金：

中国国家自然科学基金;

关键词：

Carrier phase recovery (CPR); Offset quadrature amplitude modulation (OQAM); Phase noise; Coherent communication;

D O I：

10.1016/j.optcom.2016.07.083

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Low complexity carrier phase recovery (CPR) scheme based on vertical blind phase search (V-BPS) for M-ary offset quadrature amplitude modulation (OQAM) is proposed and numerically verified. After investigating the constellations of both even and odd samples with respect to the phase noise, we identify that the CPR can be realized by measuring the verticality of constellation with respect to different test phase angles. Then measurement without multiplication in the complex plane is found with low complexity. Furthermore, a two-stage configuration is put forward to further reduce the computational complexity (CC). Compared with our recently proposed modified blind phase search (M-BPS) algorithm, the proposed algorithm shows comparable tolerance of phase noise, but reduces the CC by a factor of 3.81 (or 3.05) in the form of multipliers (or adders), taking the CPR of 16-OQAM into account. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：212 / 218

页数：7

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