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Title: Polarization-multiplexed DMT with IM-DD Using 2 x 2 MIMO processing based on SOP estimation and MPBI elimination
Authors: Zhou, X
Zhong, K
Huo, J
Yuan, J
Li, F
Wang, L
Long, K
Lau, APT 
Lu, C 
Keywords: Discrete multi-tone
Intensity modulation and direct-detection
Issue Date: 2015
Publisher: Institute of Electrical and Electronics Engineers
Source: IEEE photonics journal, 2015, v. 7, no. 6, 7802812 How to cite?
Journal: IEEE photonics journal 
Abstract: A simple polarization-multiplexed (PM) discrete multitone (DMT) system with intensity modulation and direct detection (IM-DD) is proposed for short-reach optical communications. Only four photodetectors (PDs) are required at the receiver, and no extra 90° hybrid and balanced detection is necessary. Novel digital signal processing (DSP) algorithms are proposed for state-of-polarization (SOP) estimation and subsequent mixed polarization beat interference (MPBI) elimination. These enable polarization demultiplexing and channel estimation to be implemented by a simple 2 x 2 multiple-input and multiple-output (MIMO) frequency-domain equalizer. The feasibility of the proposed PM-DMT-DD system and the effectiveness of the novel DSP algorithms are investigated via theoretical and simulation studies.
EISSN: 1943-0655
DOI: 10.1109/JPHOT.2015.2501647
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