Efficient and Secure Spectrum Utilization for Communication & Sensing in UDN by Beamspace Processing
Efficient and Secure Spectrum Utilization for Communication & Sensing in UDN by Beamspace Processing
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DOI：
10.1109/gcwkshps56602.2022.10008570
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发表时间：
2022-12
期刊：
影响因子：
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通讯作者：
T. Guo;Husheng Li;A. B. Mackenzie
中科院分区：
文献类型：
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作者：
T. Guo;Husheng Li;A. B. Mackenzie
受一些潜在用例的启发，本文关注如何进一步提高已经拥挤的电磁频谱的利用率，以实现联合通信和传感。尽管在过去几十年中已经朝着频谱效率做出了巨大的努力，但是仍然存在通过利用无线电资源的多个域并且考虑诸如通信和感测的多个功能的协同来提高频谱利用率的空间。可探测性或灵敏度是一个令人关注的问题，特别是对于无线电污染监测和基于机会通信信号的无源雷达。我们试图通过利用波束空间处理来提高灵敏度，而不牺牲覆盖范围。具体地，提出了基于联合发射机-接收机（Tx-Rx）多波束扫描（或跳变）的集成感测和通信（ISAC）的概念，利用具有波束成形能力的密集部署的基站（BS）。具有云无线电接入网络（CRAN）配置的超密集网络（UDN）基础设施有利于集中式协调和数据处理（例如，基于多接收机的定位）。我们提出了一个资源分区技术与波束扫描，并使用模拟来检查它。研究了一种适用于UDN中Tx-Rx多波束联合扫描的无源多目标定位框架，通过分组算法将传统的基于距离差（RD）的定位技术从单目标扩展到多目标。此外，从非密码学的角度考虑了与窄波束扫描相关的安全问题。在支持波束扫描的UDN中，我们提出了一种时空解耦方法和一种对抗欺骗攻击的挑战-响应验证方案。
Motivated by a few potential use cases, this paper concerns how to further improve the utilization of the already-crowded electromagnetic spectrum for joint communication and sensing. Although tremendous efforts have been made in the last few decades towards spectrum efficiency, there is still room for improving spectrum utilization by exploiting multiple domains of the radio resources and considering synergy of multiple functions, such as communication and sensing. Detectability or sensitivity is a concerning issue especially for radio pollution monitoring and passive radar based on communication signals of opportunity. We try to improve the sensitivity without sacrificing coverage by exploiting beamspace processing. Specifically, a concept of joint transmitter-receiver (Tx-Rx) multi-beam sweeping (or hopping) based Integrated Sensing and Communication (ISAC) is proposed, taking advantage of densely deployed base stations (BSs) with beamforming capability. The Ultra-Dense Network (UDN) infrastructure with Cloud Radio Access Network (CRAN) configuration favors centralized coordination and data processing (e.g., multi-receiver-based localization). We propose a resource partition technique to work with beam sweeping, and examine it using simulation. A passive multi-target localization framework suitable for the joint Tx-Rx multi-beam sweeping in UDN is studied, where the traditional Range-Difference (RD)-based locating technique is extended from single target to multiple targets by using a grouping algorithm. Furthermore, security issues related to narrow beam sweeping are considered from a non-cryptography perspective. We propose a space-time decoupling method and a challenge-response verification scheme against spoofing attacks in the UDN that supports beam sweeping.