Digital mobile fronthaul scheme based on diff-delta-sigma modulation and OCT precoding

被引：1

作者：

Yang, Xiongwei ^{[1
,2
]}

Yu, Jianjun ^{[1
,2
]}

Long, Jianyu ^{[1
,2
]}

Wang, Chen ^{[1
,2
]}

Wei, Yi ^{[1
,2
]}

Zhao, Feng ^{[3
]}

Zhou, Wen ^{[1
,2
]}

Wang, Kaihui ^{[1
,2
]}

机构：

[1] Fudan Univ, State Key Lab ASIC & Syst, Key Lab Informat Sci Electromagnet Waves MoE, Shanghai 200433, Peoples R China

[2] Fudan Univ, Sch Informat Sci & Technol, Shanghai 200433, Peoples R China

[3] Xian Univ Posts & Telecommun, Sch Automat, Xian 710121, Peoples R China

来源：

OPTICS LETTERS | 2024年 / 49卷 / 16期

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

OVER-FIBER; TRANSMISSION; TRANSMITTER;

D O I：

10.1364/OL.534068

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this Letter, we experimentally demonstrate digital mobile fronthaul (MFH) for 65536 quadrature amplitude modulation (65536-QAM) signals based on a diff-delta-sigma modulation (D-DSM) scheme with orthogonal circulant matrix transform (OCT) precoding. By combining the DDSM scheme with OCT precoding, we successfully solved the problem of uneven distribution of in-band quantization noise (IBN) while bringing about a quantization SNR gain of about 1.5 dB. In addition, we compare two signal combination schemes, Gray coding and power superposition, in the D-DSM scheme. The results show that the power superposition scheme can achieve similar performance to Gray coding with lower computational complexity. At the same time, the power superposition scheme is less affected by the saturation effect. Therefore, the D-DSM solution combined with OCT precoding and power superposition provides an effective solution for future 6 G digital mobile fronthaul. (c) 2024 Optica Publishing Group. All rights, including for text and data nologies, are reserved.

引用

页码：4617 / 4620

页数：4

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