Title :
Channel estimation and iterative equalization for long-haul coherent optical OFDM communication systems
Author :
Shoreh, Morteza H. ; Ghanaatian, Reza ; Salehi, Jawad A.
Author_Institution :
Opt. Networks Res. Lab. (ONRL), Sharif Univ. of Technol., Tehran, Iran
Abstract :
In this paper, we propose an iterative block equalizer for long-haul Coherent Optical Orthogonal Frequency Division Multiplexing (CO-OFDM) communication systems. The proposed scheme is based on a soft Minimum Mean-Squared Error (MMSE) iterative block equalizer. Two different channel estimation methods are also discussed. The performance and computational complexity of the proposed iterative equalization and channel estimation techniques are evaluated as well. The obtained Bit Error Rate (BER) performance reveal that the iterative equalizer outperforms the linear equalizers by almost two orders of magnitude.
Keywords :
OFDM modulation; channel estimation; computational complexity; error statistics; iterative methods; least mean squares methods; optical modulation; BER; CO-OFDM communication system; MMSE iterative block equalizer; bit error rate; channel estimation method; computational complexity; iterative equalization; long-haul coherent optical OFDM communication system; long-haul coherent optical orthogonal frequency division multiplexing communication system; minimum mean squared error iterative block equalizer; Channel estimation; Equalizers; Fiber nonlinear optics; OFDM; Optical fibers; Coherent Optical Orthogonal Frequency Devision Multiplexing (CO-OFDM); channel estimation; iterative equalizer; long-haul fiber optic channels;
Conference_Titel :
Telecommunications (ConTEL), 2015 13th International Conference on
Conference_Location :
Graz
DOI :
10.1109/ConTEL.2015.7231185
