Use of Digital-Television terrestrial (DTV) signals for passive radars

Purpose of this paper is the description of how to use the Digital-Television terrestrial Video (DTV) stations as a non-cooperative illuminator in bistatic radar. Based on it is shown that the original DTV signal contains random and deterministic components. Analyzing the ambiguity function of the DTV signals, it is found that the deterministic components cause unwanted peaks around the desired peak pertaining to the useful echo thus the target detections is difficult to do and/or false targets can be revealed. In this paper, a new approach to improve the ambiguity function around the useful echo will be proposed. In order to study, evaluate and elaborate the DTV signal, a simulator of the complete signal was performed This paper is organized as follows: next section 1 will describe the obtained outputs of DTV simulator; section (2) will describe the complete block diagram of passive radar using DTV signal, describing the new signal processing approach to improve the ambiguity function; section (3) will describe the obtained results from a realistic scenario; section (4) will present some preliminary results about the multipath effect on the system performance.