Title :
Polarization-Multiplexed DMT With IM-DD Using 2 × 2 MIMO Processing Based on SOP Estimation and MPBI Elimination
Author :
Xian Zhou ; Kangping Zhong ; Jiahao Huo ; Jinhui Yuan ; Feng Li ; Liang Wang ; Keping Long ; Lau, Alan Pak Tao ; Chao Lu
Author_Institution :
Sch. of Comput. & Commun. Eng., Univ. of Sci. & Technol. Beijing, Beijing, China
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 × 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.
Keywords :
MIMO communication; demultiplexing; intensity modulation; multiplexing; optical information processing; optical receivers; photodetectors; 2 × 2 MIMO processing; IM-DD; MPBI elimination; SOP estimation; balanced detection; channel estimation; digital signal processing algorithms; direct detection; intensity modulation; mixed polarization beat interference elimination; multiple-input and multiple-output frequency-domain equalizer; photodetectors; polarization demultiplexing; polarization-multiplexed DMT; polarization-multiplexed discrete multitone system; receiver; short-reach optical communications; state-of-polarization estimation; Digital signal processing; Estimation; MIMO; OFDM; Optical polarization; Optical transmitters; Receivers; Polarization-multiplexing; discrete multi-tone; intensity modulation and direct-detection; polarization-multiplexing;
Journal_Title :
Photonics Journal, IEEE
DOI :
10.1109/JPHOT.2015.2501647
