Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/27661
Title: Enhanced Channel Equalizers for Adaptive Zero-Guard-Interval CO-OFDM Systems
Authors: Wang, W
Zhuge, Q
Gao, Y
Qiu, M
Chagnon, M
Sowailem, MY
Zhang, F
Plant, DV
Keywords: Adaptive equalizer
Coherent detection
Orthogonal frequency division multiplexing
Training symbol
Issue Date: 2015
Publisher: Institute of Electrical and Electronics Engineers Inc.
Source: IEEE photonics technology letters, 2015, v. 27, no. 16, p. 1721-1724 How to cite?
Journal: IEEE Photonics Technology Letters 
Abstract: We propose the design and implementation of frequency domain block least mean square and block recursive least square equalizers for adaptive zero-guard-interval (ZGI) coherent optical (CO) orthogonal frequency division multiplexing (OFDM) systems. We experimentally demonstrate the improvements in fiber nonlinear tolerance and channel estimation accuracy over conventional training symbol (TS)-based equalizers and data aided zero-forcing (ZF) equalizers, in single channel 112-Gb/s quadrature phase shift keying (QPSK), and 250-Gb/s 16 quadrature amplitude modulation (QAM) ZGI CO-OFDM systems. The transmission distance is increased by 20% and 7% for QPSK, and 53% and 35% for 16-QAM systems, compared with the TS-based and decision aided ZF adaptive equalizers, respectively. In addition, simulation results demonstrate the improved temporal tracking ability of the proposed algorithms over the previous ZF equalizer.
URI: http://hdl.handle.net/10397/27661
ISSN: 1041-1135
DOI: 10.1109/LPT.2015.2438256
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