Multiple target localization for wideband massive MIMO Bi-static ISAC system

In this paper, we investigate the localization of multiple non-cooperative targets in a wideband massive multiple-input multiple-output (MIMO) bi-static integrated sensing and communications (ISAC) system. Firstly, we analyze the three-dimensional controllable beam squint effect in wideband massive MIMO bi-static system. Subsequently, the effective angles of departure (AoDs) from the main base station (BS) and auxiliary BS to the multiple non-cooperative targets are estimated based on the controllable beam squint strategy. Finally, an AoDs matching method is proposed by utilizing the estimated AoDs and the estimated path losses to obtain the locations of the multiple non-cooperative targets. The numerical simulations demonstrate the effectiveness of the proposed localization method.