Measurement-based Characterization of ISAC Channels with Distributed Beamforming at Dual mmWave Bands and with Human Body Scattering and Blockage

TL;DR

This study presents millimeter-wave channel measurements for integrated sensing and communication with distributed dual-band links in indoor environments, highlighting the impact of human presence and orientation on channel characteristics.

Contribution

It introduces a novel measurement setup for dual-band ISAC channels with human scattering and blockage, providing detailed delay and angular domain characterizations.

Findings

Human location affects channel properties.

Human facing orientation influences channel modeling.

Dual-band measurements reveal complex scattering effects.

Abstract

In this paper, we introduce our millimeter-wave (mmWave) radio channel measurement for integrated sensing and communication (ISAC) scenarios with distributed links at dual bands in an indoor cavity; we also characterize the channel in delay and azimuth-angular domains for the scenarios with the presence of 1 person with varying locations and facing orientations. In our setting of distributed links with two transmitters and two receivers where each transceiver operates at two bands, we can measure two links whose each transmitter faces to one receiver and thus capable of line-of-sight (LOS) communication; these two links have crossing Fresnel zones. We have another two links capable of capturing the reflectivity from the target presenting in the test area (as well as the background). The numerical results in this paper focus on analyzing the channel with the presence of one person. It is evident that not only the human location, but also the human facing orientation, shall be taken into account when modeling the ISAC channel.