Sensing Rate Optimization for Multi-Band Cooperative ISAC Systems

IF 4.4 3区计算机科学 Q2 TELECOMMUNICATIONS

IEEE Communications Letters Pub Date : 2025-07-14 DOI:10.1109/LCOMM.2025.3588676

Nemanja Stefan Perović;Mark F. Flanagan;Le-Nam Tran

引用次数: 0

Abstract

Integrated sensing and communication (ISAC) has been recognized as one of the key technologies for future wireless networks, which potentially need to operate in multiple frequency bands to satisfy ever-increasing demands for both communication and sensing services. Motivated by this, we consider the sum sensing rate (SR) optimization for a cooperative ISAC system with linear precoding, where each base station (BS) works in a different frequency band. With this aim, we propose an optimization algorithm based on the semi-definite rank relaxation that introduces covariance matrices as optimization variables, and we apply the inner approximation (IA) method to deal with the nonconvexity of the resulting problem. Simulation results show that the proposed algorithm increases the SR by approximately 25% and 40% compared to the case of equal power distribution in a cooperative ISAC system with two and three BSs, respectively. Additionally, the algorithm converges in only a few iterations, while its most beneficial implementation scenario is in the low power regime.

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多波段协同ISAC系统传感速率优化

集成传感和通信（ISAC）已被认为是未来无线网络的关键技术之一，它可能需要在多个频段上运行，以满足对通信和传感业务不断增长的需求。基于此，我们考虑了一个具有线性预编码的ISAC系统的和感知速率优化问题，其中每个基站工作在不同的频段。为此，我们提出了一种基于半定秩松弛的优化算法，引入协方差矩阵作为优化变量，并应用内逼近（IA）方法来处理所得到问题的非凸性。仿真结果表明，与具有2个和3个BSs的ISAC系统的等功率分配情况相比，该算法分别提高了约25%和40%的SR。此外，该算法只需几次迭代即可收敛，而其最有利的实现场景是在低功耗状态下。

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 Communications Letters 工程技术-电信学

CiteScore

8.10

自引率

7.30%

发文量

590

审稿时长

2.8 months

期刊介绍： The IEEE Communications Letters publishes short papers in a rapid publication cycle on advances in the state-of-the-art of communication over different media and channels including wire, underground, waveguide, optical fiber, and storage channels. Both theoretical contributions (including new techniques, concepts, and analyses) and practical contributions (including system experiments and prototypes, and new applications) are encouraged. This journal focuses on the physical layer and the link layer of communication systems.