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In this paper, we consider the channel modeling of a heterogeneous vehicularintegrated sensing and communication (ISAC) system, where a dual-functionalmulti-antenna base station (BS) intends to communicate with a multi-antennavehicular receiver (MR) and sense the surrounding environments simultaneously.The time-varying complex channel impulse responses (CIRs) of the sensing andcommunication channels are derived, respectively, in which the sensing andcommunication channels are correlated with shared clusters. The proposed modelsshow great generality for the capability in covering both monostatic andbistatic sensing scenarios, and as well for considering both staticclusters/targets and mobile clusters/targets. Important channel statisticalcharacteristics, including time-varying spatial cross-correlation function(CCF) and temporal auto-correlation function (ACF), are derived and analyzed.Numerically results are provided to show the propagation characteristics of theproposed ISAC channel model. Finally, the proposed model is validated via theagreement between theoretical and simulated as well as measurement results.

Channel Modeling for Heterogeneous Vehicular ISAC System with Shared Clusters