A Bi-static ISAC Channel Measurement and Its Digital Twin

Identifying the target from the environment is one of the important functions of the integrated sensing and communication (ISAC) system. An effective method to extract the target from the environment is to establish digital twins (DTs) of the background channel and the target channel and use the twin environment information for identification. In this article, we complete a 28 GHz channel measurement for three locations in the hall and extract the multipath components (MPCs) information through the CLEAN algorithm. Then we use a two-layer reverse deduction algorithm for these MPCs to build the DT of the measurement channel. The DT is composed of the first- and second-order reflection paths, and they occupy more than 90% power of all MPCs.