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Digital Backpropagation Based on Binary Logarithmic Step Size Distribution for Fiber Nonlinearity Compensation
  • Albert Dede,
  • Shyqyri Haxha,
  • Emmanuel Kofi Akowuah
Albert Dede
Kwame Nkrumah University of Science and Technology

Corresponding Author:[email protected]

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Shyqyri Haxha
Royal Holloway University of London
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Emmanuel Kofi Akowuah
Kwame Nkrumah University of Science and Technology
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Abstract

Capacity crunch has become critical in recent years as commercial communication systems approach their theoretical data rate limits. This work presents a low-complexity digital backpropagation (DBP) implementation approach based on step size distribution that uses a binary logarithmic step size method to achieve high data rate optical transmission. The proposed scheme shows performance improvements (∆Q) of 2.36 dB, 1.19 dB, and 0.71 dB over linear compensation, constant step size DBP, and logarithmic step size DBP techniques in a 2400 km 112 Gbit/s DP-16QAM system, respectively. At 13 dBm, a high performance (Q) of 10.9 dB (BER = 2.25×10-4) is achieved, above the 3.80×10-3 hard-decision forward error correction (HD-FEC) limit, using the proposed scheme. Also, the allowable transmission distance is extended by 960 km at the HD-FEC limit over the linear compensation technique. The optimization achieves a 38% savings in the number of DBP calculation steps compared to the constant step size DBP, which considerably reduces the computational cost since a few steps are required for effective nonlinearity compensation.
22 May 2023Submitted to The Journal of Engineering
24 May 2023Assigned to Editor
24 May 2023Submission Checks Completed
02 Jul 2023Reviewer(s) Assigned
31 Jul 2023Review(s) Completed, Editorial Evaluation Pending
02 Aug 2023Editorial Decision: Revise Minor
11 Aug 20231st Revision Received
16 Aug 2023Assigned to Editor
16 Aug 2023Submission Checks Completed
23 Aug 2023Reviewer(s) Assigned
23 Sep 2023Review(s) Completed, Editorial Evaluation Pending
23 Sep 2023Editorial Decision: Revise Minor
24 Sep 20232nd Revision Received
25 Sep 2023Submission Checks Completed
25 Sep 2023Assigned to Editor
25 Sep 2023Reviewer(s) Assigned