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UWB (Ultra Wide-Band) radar systems are promising imaging tools covering a variety of application fields including surveillance systems. UWB radar technology can provide advanced capabilities for current surveillance systems. An imaging algorithm for UWB radars, the TR (Time-Reversal) method enables high-resolution imaging in a multipath environment. Conventional TR methods have been applied to antenna array systems while our previous work proposed a TR method with a low-cost single antenna-based system. In this study, we propose a radar system with a single antenna on a vehicle in a multipath environment. This vehicle is assumed to get close to a moving target by adaptively tracking the target location. Some numerical simulation results show that the proposed low-cost system works well in a multi-path environment.