Öz In this paper, theoretical analysis of UMTS signals have been performed from the standpoint of passive radar application and a receiver with circular array antenna has been modeled in order to simulate a UMTS passive radar. It is assumed that the radar system consisting of single transmitter and single receiver that is capable of measuring bistatic range, range-rate, and azimuth followed by a two stage target tracking algorithm is utilized. Performance of the system has been analyzed through Monte Carlo simulations