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Optical Engineering

Channel estimation method using orthogonal sequences in frequency domain for 100-Gb/s polarization-division multiplexing single-carrier frequency domain equalization coherent optical communication systems
Author(s): Liu Liu; Jing He; Jin Tang; Yun Cheng; Lin Chen
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Paper Abstract

A channel estimation method is proposed in polarization-division multiplexing single-carrier frequency domain equalization (PDM-SCFDE) optical coherent communications systems. The method utilizes a pair of orthogonal training sequences (TSs) in frequency domain and combines them with a provided reconstructive algorithm. Consequently, it can estimate full PDM channel state information accurately. Meanwhile, only one block of training overhead is required in the method. In this way, it is extremely bandwidth efficient. Two blocks training overhead are needed for the other literature. Based on a 100-Gb/s PDM-SCFDE coherent optical communications system, numerical simulation results show that the bit error rate performance of the proposed method is better than that of other methods with different TSs. Moreover, the proposed method is robust against amplified spontaneous emission noise.

Paper Details

Date Published: 26 May 2014
PDF: 6 pages
Opt. Eng. 53(5) 056116 doi: 10.1117/1.OE.53.5.056116
Published in: Optical Engineering Volume 53, Issue 5
Show Author Affiliations
Liu Liu, Hunan Univ. (China)
Jing He, Hunan Univ. (China)
Jin Tang, Hunan Univ. (China)
Yun Cheng, Hunan Univ. of Humanities (China)
Lin Chen, Hunan Univ. (China)


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