Joint Transmit and Reflective Beamforming for Multi-Active-IRS-Assisted Cooperative Sensing
Yuan Fang, Xianghao Yu, and Jie Xu

TL;DR
This paper proposes a joint transmit and reflective beamforming approach for multi-active-IRS-assisted cooperative sensing, enhancing target localization in NLoS scenarios by optimizing beamforming to minimize estimation error.
Contribution
It introduces a novel joint optimization framework for transmit and reflective beamforming in multi-active IRS systems, addressing non-convex challenges with an efficient alternating optimization algorithm.
Findings
Active IRSs significantly improve sensing accuracy over passive IRSs.
The proposed algorithm effectively minimizes the maximum CRB.
Numerical results confirm the benefits of multi-active IRS cooperation.
Abstract
This paper studies multi-active intelligent-reflecting-surface (IRS) cooperative sensing, in which multiple active IRSs are deployed in a distributed manner to help the base station (BS) provide multi-view sensing. We focus on the scenario where the sensing target is located in the non-line-of-sight (NLoS) area of the BS. Based on the received echo signal, the BS aims to estimate the target's direction-of-arrival (DoA) with respect to each IRS. In addition, we leverage active IRSs to overcome the severe path loss induced by multi-hop reflections. Under this setup, we minimize the maximum Cram\'{e}r-Rao bound (CRB) among all IRSs by jointly optimizing the transmit beamforming at the BS and the reflective beamforming at the multiple IRSs, subject to the constraints on the maximum transmit power at the BS, as well as the maximum transmit power and the maximum power amplification gain at…
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
Taxonomy
TopicsOptical Wireless Communication Technologies · Advanced Photonic Communication Systems · Advanced Fiber Optic Sensors
