A Survey on Fundamental limits of Integrated Sensing and Communication

公告

文21和文22分别介绍了雷达传感和无线定位技术的fundamental limits

主要贡献：

①提出系统性的分类算法，为雷达传感技术和ISAC技术，为了让他们能融合进一个统一的框架

②pay attention to融合系统的基本极限

③总结各种ISAC系统的信道模型拓扑结构，抽象出几种典型的ISAC模型。（ISAC的基本极限不能通过简单的组合单独传感和通信系统的性能边界来获得）

④列出ISAC面临的重要挑战和潜在研究方向，其中很多在以前的工作中没有提到。

第二部分：介绍了联合感知通信的分类

第三部分：基本的性能评价标准对于雷达感知和ISAC

第四部分：现有的研究进展：关于device-free sensing、device-based sensing、device -free ISAC和device-based ISAC的基本极限。

最后：讨论了开放的问题和未来的研究方向

A. Device-free Sensing
主要是雷达感知：the probing signal is reflected by the target and the radar echo is received by radar.

①phased-array radar: whether the transmit and receive arrays are placed together, mono-static phased-array radar and bi-static phased-array radar.
②MIMO radar: transmit decorrelated probing signals, MIMO can overcome target RCS scintillations, divided into colocated MIMO radar and distributed MIMO radar
③phased-MIMO radar: transmit array of phased-MIMO radar is divided into different sub-arrays which are allowed to have overlapping.each subarray can be regarded as a phased-array radar and all subarray can be jointly regarded as a MIMO radar.

④无源雷达：exploits the echoes from the targets that are illuminated by pre-existing transmitters（what are these pre-existing transmitters?）.

如何理解其性能很大程度上受到通信信号和信道特点的影响？其如何从纷杂的电磁波中分理出目标的电磁波？

B. DEVICE-BASED Sensing

基于无线方式的定位：wireless-based localization : a set of wireless reference signals propagated between the reference nodes and the targeting object.

focused on the case when the target want to localize itself based on the signals received from multiple anchors.

classification: cooperative localization and non-cooperative localization.

C. Device-free ISAC

①Multiple Access Channel with Mono-static sensing;

②Multiple Access Channel with bi-static sensing;

③Broadcast Channel with Mono-static sensing;

④Broadcast Channel with Mono-static sensing;

D. Device-based ISAC

①Multiple Access Channel with Non-Cooperative Localization;

②Broadcast Channel with Non-Cooperative Localization;

③Relay Channel with Cooperative Localization;

④D2D Channel with Cooperative Localization;

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