Beamforming and Reflection Design for Short Packet ISAC With Non-Ideal RIS: An A3C-Based Approach

IF 7.1 2区计算机科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Vehicular Technology Pub Date : 2025-01-03 DOI:10.1109/TVT.2025.3525525

Behrad Mahmoudi;Ahmad Khonsari;Farshad Zeinali;Mohammad Robat Mili;Mahdi Boloursaz Mashhadi;Pei Xiao

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引用次数: 0

Abstract

Integrated sensing and communication (ISAC) is a promising solution to mitigate the increasing congestion of the wireless spectrum. In this paper, we investigate the short packet communication regime within an ISAC system assisted by a reconfigurable intelligent surface (RIS) to meet the low latency ultra-reliable requirements in the next-generation wireless networks. We consider a non-ideal RIS model that captures effects of the phase-dependent amplitude variations in the reflection coefficients, and we have incorporated the near-field model into the channels between the RIS and the users or targets. In this setup, we jointly design the transmit beamforming and the RIS phase shifts to maximize the sum rate while satisfying the sensing signal-to-noise ratio (SNR) requirement. The system simultaneously carries out multitarget sensing and multi-user short packet communications with the help of the RIS. Considering the non-convex and dynamic nature of the resulting optimization problem, we propose an asynchronous advantage actor-critic (A3C) based method for beamforming and reflection design in this setup. Numerical results demonstrate the superiority of the proposed scheme over the benchmarks.

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非理想RIS短包ISAC的波束形成与反射设计：一种基于a3c的方法

集成传感与通信（ISAC）是一种很有前途的解决方案，以缓解日益严重的无线频谱拥塞。在本文中，我们研究了在可重构智能表面（RIS）辅助下的ISAC系统中的短包通信机制，以满足下一代无线网络中的低延迟超可靠要求。我们考虑了一个非理想的RIS模型，该模型捕获了反射系数中相位相关振幅变化的影响，并且我们将近场模型纳入了RIS与用户或目标之间的通道中。在这种设置中，我们共同设计了发射波束形成和RIS相移，以最大限度地提高和速率，同时满足传感信噪比（SNR）要求。该系统借助RIS同时实现多目标传感和多用户短包通信。考虑到所产生的优化问题的非凸性和动态特性，我们提出了一种基于异步优势actor-critic （A3C）的波束形成和反射设计方法。数值结果表明，该方案优于基准方案。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Transactions on Vehicular Technology 工程技术-电信学

CiteScore

6.00

自引率

8.80%

发文量

1245

审稿时长

6.3 months

期刊介绍： The scope of the Transactions is threefold (which was approved by the IEEE Periodicals Committee in 1967) and is published on the journal website as follows: Communications: The use of mobile radio on land, sea, and air, including cellular radio, two-way radio, and one-way radio, with applications to dispatch and control vehicles, mobile radiotelephone, radio paging, and status monitoring and reporting. Related areas include spectrum usage, component radio equipment such as cavities and antennas, compute control for radio systems, digital modulation and transmission techniques, mobile radio circuit design, radio propagation for vehicular communications, effects of ignition noise and radio frequency interference, and consideration of the vehicle as part of the radio operating environment. Transportation Systems: The use of electronic technology for the control of ground transportation systems including, but not limited to, traffic aid systems; traffic control systems; automatic vehicle identification, location, and monitoring systems; automated transport systems, with single and multiple vehicle control; and moving walkways or people-movers. Vehicular Electronics: The use of electronic or electrical components and systems for control, propulsion, or auxiliary functions, including but not limited to, electronic controls for engineer, drive train, convenience, safety, and other vehicle systems; sensors, actuators, and microprocessors for onboard use; electronic fuel control systems; vehicle electrical components and systems collision avoidance systems; electromagnetic compatibility in the vehicle environment; and electric vehicles and controls.