Target Localization and Performance Trade-Offs in Cooperative ISAC Systems: A Scheme Based on 5G NR OFDM Signals
arxiv(2024)
摘要
The integration of sensing capabilities into communication systems, by
sharing physical resources, has a significant potential for reducing spectrum,
hardware, and energy costs while inspiring innovative applications. Cooperative
networks, in particular, are expected to enhance sensing services by enlarging
the coverage area and enriching sensing measurements, thus improving the
service availability and accuracy. This paper proposes a cooperative integrated
sensing and communication (ISAC) framework by leveraging information-carrying
orthogonal frequency division multiplexing (OFDM) signals transmitted by access
points (APs). Specifically, we propose a two-stage scheme for target
localization, where communication signals are reused as sensing reference
signals based on the system information shared at the central processing unit
(CPU). In Stage I, we measure the ranges of scattered paths induced by targets,
through the extraction of time-delay information from the received signals at
APs. Then, the target locations are estimated in Stage II based on these range
measurements. Considering that the scattered paths corresponding to some
targets may not be detectable by all APs, we propose an effective algorithm to
match the range measurements with the targets and achieve the target location
estimation. Notably, by analyzing the OFDM numerologies defined in fifth
generation (5G) standards, we elucidate the flexibility and consistency of
performance trade-offs in both communication and sensing aspects. Finally,
numerical results confirm the effectiveness of our sensing scheme and the
cooperative gain of the ISAC framework.
更多查看译文
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要