Full Text:   <532>

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CLC number: TN926

On-line Access: 2024-01-26

Received: 2023-02-28

Revision Accepted: 2024-01-26

Crosschecked: 2023-08-20

Cited: 0

Clicked: 821

Citations:  Bibtex RefMan EndNote GB/T7714

 ORCID:

Miaoran PENG

https://orcid.org/0009-0005-4039-1637

Lixia XIAO

https://orcid.org/0000-0001-7959-8356

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Frontiers of Information Technology & Electronic Engineering  2023 Vol.24 No.12 P.1752-1762

http://doi.org/10.1631/FITEE.2300133


Digital-to-analog converter free architecture for digital reconfigurable intelligent surface


Author(s):  Miaoran PENG, Jinhao KAN, Lixia XIAO, Guanghua LIU, Tao JIANG

Affiliation(s):  Research Center of 6G Mobile Communications, Huazhong University of Science and Technology, Wuhan 430074, China; more

Corresponding email(s):   pengmiaoran@hust.edu.cn, lixiaxiao@hust.edu.cn

Key Words:  Reconfigurable intelligent surface, Hardware implementation, High-order modulation


Miaoran PENG, Jinhao KAN, Lixia XIAO, Guanghua LIU, Tao JIANG. Digital-to-analog converter free architecture for digital reconfigurable intelligent surface[J]. Frontiers of Information Technology & Electronic Engineering, 2023, 24(12): 1752-1762.

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author="Miaoran PENG, Jinhao KAN, Lixia XIAO, Guanghua LIU, Tao JIANG",
journal="Frontiers of Information Technology & Electronic Engineering",
volume="24",
number="12",
pages="1752-1762",
year="2023",
publisher="Zhejiang University Press & Springer",
doi="10.1631/FITEE.2300133"
}

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%T Digital-to-analog converter free architecture for digital reconfigurable intelligent surface
%A Miaoran PENG
%A Jinhao KAN
%A Lixia XIAO
%A Guanghua LIU
%A Tao JIANG
%J Frontiers of Information Technology & Electronic Engineering
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%@ 2095-9184
%D 2023
%I Zhejiang University Press & Springer
%DOI 10.1631/FITEE.2300133

TY - JOUR
T1 - Digital-to-analog converter free architecture for digital reconfigurable intelligent surface
A1 - Miaoran PENG
A1 - Jinhao KAN
A1 - Lixia XIAO
A1 - Guanghua LIU
A1 - Tao JIANG
J0 - Frontiers of Information Technology & Electronic Engineering
VL - 24
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EP - 1762
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/FITEE.2300133


Abstract: 
This research investigates the digital-to-analog converter (DAC) free architecture for the digital reconfigurable intelligent surface (RIS) system, where the transmission lines are implemented for reflection coefficient (RC) control to reduce power consumption. In the proposed architecture, the radio frequency (RF) switch based phase shifter is considered. By using a single-pole four-throw (SP4T) switch to simultaneously control the RCs of a group of elements, a 2-bit phase shifter is realized for passive beam steering. A novel modulation scheme is developed to explore the cost effectiveness, which approaches the performance of traditional quadrature amplitude modulation (QAM). Specifically, to overcome the limitation of the phase shift bits, joint frequency-shift and phase-rotation operations are applied to the constellation points. The simulation and experimental results demonstrate that the proposed architecture is capable of providing an ideal transmission performance. Moreover, 64- and 256-QAM modulation schemes could be implemented by expanding the elements and phase bits.

免数模转换的数字可重构智能超表面架构

彭淼然1,2,3,阚锦昊1,2,3,肖丽霞1,2,3,刘光华1,2,3,江涛1,2,3
1华中科技大学6G移动通信研究中心,中国武汉市,430071
2华中科技大学网络科学与工程学院,中国武汉市,430071
3华中科技大学电子信息与通信学院,中国武汉市,430071
摘要:本文研究用于数字可重构智能超表面系统的新型免数模转换架构。其中,微带传输线被用于反射系数控制,从而降低系统功耗。在所提架构中,每个单刀4掷开关同时控制一组元件的反射系数以实现2位移相器。为进一步降低成本,提出一种新型调制方案,该方案能获得接近传统正交幅度调制方案的性能。为了突破相移位数的限制,联合使用频移与相位旋转获得更多的星座点。仿真结果和实验结果表明,所提架构能够获得理想的传输性能。进一步地,可通过扩展智能超表面单元数量以及相移比特,可实现64-QAM和256-QAM等高阶调制方案。

关键词:可重构智能超表面;硬件实现;高阶调制

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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