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

Liu Liu; Jing He; Jin Tang; Yun Cheng; Lin Chen

doi:10.1117/1.OE.53.5.056116

26 May 2014 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

Liu Liu, Jing He, Jin Tang, Yun Cheng, Lin Chen

Author Affiliations +

Optical Engineering, Vol. 53, Issue 5, 056116 (May 2014). https://doi.org/10.1117/1.OE.53.5.056116

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.

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Liu Liu, Jing He, Jin Tang, Yun Cheng, and Lin Chen "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," Optical Engineering 53(5), 056116 (26 May 2014). https://doi.org/10.1117/1.OE.53.5.056116

Published: 26 May 2014

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KEYWORDS

Polarization

Telecommunications

Multiplexing

Optical communications

Reconstruction algorithms

Receivers

Transmitters

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