Effects of bandwidth on joint estimation performance of direction-of-departure and direction-of-arrival in ultra-wideband MIMO radar

In direction estimation applications, several angle estimation algorithms in multiple-input multiple-output (MIMO) radars were proposed, including joint estimation of direction-of-departure (DOD) and direction-of-arrival (DOA). Nevertheless, these reports were mainly based on narrowband signal assumption. Target localization using the narrowband signal, however, was unstable due to radar cross section fluctuation. The authors proposed a joint DOD and DOA estimation in an ultra-wideband (UWB) MIMO radar system (Pasya et al., IEEE Radio Wireless Symposium 2014, to be published). The proposed scheme utilized a two-way MUSIC algorithm to estimate the respective DOD and DOA at each frequency component. Among these angle estimations, wideband DOD and DOA were then estimated by majority decisions. This report studies the effects of signal bandwidth on the performance of the proposed angle estimation scheme.