3+2nd-order SMASH delta-sigma modulator with noise-coupling supported 65536-QAM for digital mobile fronthaul with OPGW

Huan Zhao; Xuefeng Wang; Zibing Yu; Mingzhang Fang; Shaowei Zhang; Ran Hu; Anting Xu; Zilin You

doi:10.1117/12.3042519

5 December 2024 3+2^nd-order SMASH delta-sigma modulator with noise-coupling supported 65536-QAM for digital mobile fronthaul with OPGW

Huan Zhao, Xuefeng Wang, Zibing Yu, Mingzhang Fang, Shaowei Zhang, Ran Hu, Anting Xu, Zilin You

Author Affiliations +

Proceedings Volume 13418, Fifteenth International Conference on Information Optics and Photonics (CIOP 2024); 1341808 (2024) https://doi.org/10.1117/12.3042519
Event: 15th International Conference on Information Optics and Photonics (CIOP2024), 2024, Xi’an, China

Abstract

In this paper, 3+2^nd-order sturdy multistage noise-shaping delta-sigma modulation with noise-coupling (SMASH-NC) structure is proposed for digital mobile fronthaul (MFH) architecture. The computational complexity of the 3+2^nd-order SMASH-NC is approached to that of the traditional fourth-order single-loop delta-sigma modulation (SDSM), but with the sixth-order noise shaping capability. The MFH architectures based on 3+2^nd-order SMASH-NC and fourth-order SDSM are simulated and compared. 10-Gbaud PAM-4 signal is transmitted through the 20-km IM-DD link. With an SNR of 54.3 dB, the SMASH-NC scheme can support 65536-QAM transmission. Compared to traditional SDSM, SMASH-NC scheme balances performance and computational complexity, providing a cost-competitive solution for MFH with ultra-high-order QAM.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Huan Zhao, Xuefeng Wang, Zibing Yu, Mingzhang Fang, Shaowei Zhang, Ran Hu, Anting Xu, and Zilin You "3+2^nd-order SMASH delta-sigma modulator with noise-coupling supported 65536-QAM for digital mobile fronthaul with OPGW", Proc. SPIE 13418, Fifteenth International Conference on Information Optics and Photonics (CIOP 2024), 1341808 (5 December 2024); https://doi.org/10.1117/12.3042519

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