A Unified Performance Framework for Integrated Sensing-Communications Based on KL-Divergence
A Unified Performance Framework for Integrated Sensing-Communications Based on KL-Divergence
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DOI：
10.1109/twc.2023.3270390
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发表时间：
2023-12
影响因子：
10.4
通讯作者：
M. Al-jarrah;E. Alsusa;C. Masouros
中科院分区：
文献类型：
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作者：
M. Al-jarrah;E. Alsusa;C. Masouros
过去几年，对集成传感和通信 (ISAC) 服务的需求显着增加。这种集成带来了联合系统设计、资源分配、优化和分析等严峻挑战。由于传感和电信系统有不同的性能评估方法，因此引入统一的性能测量来提供对传感和电信质量的感知是非常有益的。为此，本文基于 Kullback-Leibler 散度（KLD）的信息理论框架对 ISAC 系统进行性能分析。所考虑的系统模型由多输入多输出 (MIMO) 基站 (BS) 组成，该基站向多个通信用户设备 (CUE) 和目标（或传感服务用户）提供 ISAC 服务。 KLD框架允许对CUE的错误率性能和目标的检测性能进行统一评估。一方面分析了目标检测能力和 CUE 错误率之间的关系，另一方面分析了所提出的 KLD。仿真验证的理论结果表明，推导的KLD非常准确，可以完美地表征两个子系统，即通信子系统和雷达子系统。
The need for integrated sensing and communication (ISAC) services has significantly increased in the last few years. This integration imposes serious challenges such as joint system design, resource allocation, optimization, and analysis. Since sensing and telecommunication systems have different approaches for performance evaluation, introducing a unified performance measure which provides a perception about the quality of sensing and telecommunication is very beneficial. To this end, this paper provides performance analysis for ISAC systems based on the information theoretical framework of the Kullback-Leibler divergence (KLD). The considered system model consists of a multiple-input-multiple-output (MIMO) base-station (BS) providing ISAC services to multiple communication user equipments (CUEs) and targets (or sensing-served users). The KLD framework allows for a unified evaluation of the error rate performance of CUEs, and the detection performance of the targets. The relation between the detection capability for the targets and error rate of CUEs on one hand, and the proposed KLD on the other hand is illustrated analytically. Theoretical results corroborated by simulations show that the derived KLD is very accurate and can perfectly characterize both subsystems, namely the communication and radar subsystems.