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arXiv · 2508.08796

Iterative Distortion Cancellation Algorithms for Single-Sideband Systems

Jun Dong·Tianwai Bo·Zhuo Wang·Haolei Gao·Zhongwei Tan·Yi Dong
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Abstract

We propose an iterative distortion cancellation algorithm to digitally mitigate the impact of double-sideband dither signal amplitude from the automatic bias control module on Kramers-Kronig receivers without modifying physical layer structures. The algorithm utilizes the KK relation for initial signal decisions and reconstructs the distortion caused by dither signals. Experimental tests in back-to-back showed it improved tolerance to dither amplitudes up to 10% V{\pi}. For 80-km fiber transmission, the algorithm increased the receiver sensitivity by more than 1 dB, confirming the effectiveness of the proposed distortion cancellation method.

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Jun Dong, Tianwai Bo, Zhuo Wang, Haolei Gao, Zhongwei Tan, Yi Dong. 2025-08-12. Iterative Distortion Cancellation Algorithms for Single-Sideband Systems. https://arxiv.org/abs/2508.08796

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