This paper considers a cell-free integrated sensing and communication (ISAC) MIMO system, where distributed MIMO access points are jointly serving the communication users and sensing the targets. For this setup, we first develop two baseline approaches that separately design the sensing and communication beamforming vectors, namely communication-prioritized sensing beamforming and sensing-prioritized communication beamforming. Then, we consider the joint sensing and communication (JSC) beamforming design and derive the optimal structure of these JSC beamforming vectors based on a max-min fairness formulation. The results show that the developed JSC beamforming is capable of achieving nearly the same communication signal-to-interference-plus-noise ratio (SINR) that of the communication-prioritized sensing beamforming solutions with almost the same sensing SNR of the sensing-prioritized communication beamforming approaches, yielding a promising strategy for cell-free ISAC MIMO systems.
翻译:本文件审议了无细胞综合遥感和通信(ISAC)MIMO系统,分布式的MIMO接入点是联合为通信用户服务并感知目标的。我们首先制定两种基准方法,分别设计感波和通信波束矢量,即通信优先感应波束和遥感优先感应波束。然后,我们考虑联合感波和通信(JSC)成形设计,并根据最大公平度的配方,为这些JSC波束矢量形成最佳结构。结果显示,开发的JSC波束成型能够实现几乎与通信优先感应波比几乎相同的通信优先感应波波比,与遥感优先感应波波波波波波波波波束方法几乎相同,从而产生了无细胞无ISAC MIIMO系统的有希望的战略。