Ambiguity Function Analysis and Side Peaks Suppression of Link16 Signal Based Passive Radar

Abstract

Link16 data link is the communication standard of the joint tactical information distribution system (JTIDS) used by the U.S. military and North Atlantic Treaty Organization, which is applied as the opportunistic illuminator for passive radar in this paper. The time-domain expression of the Link16 signal is established, and its ambiguity function expression is derived. The timedelay dimension and Doppler dimension side peaks of which lead to the appearance of the false target during target detection. To solve the problem, the time-delay dimension and Doppler dimension side peaks suppression methods are proposed. For the problem that the conventional mismatched filter (MMF) cannot suppress the time-delay dimension side peaks, a neighborhood MMF (NMMF) is proposed. Experimental results demonstrate the effectiveness of the proposed methods.

A Coherent Integration Method for Moving Target Detection in Frequency Agile Signal-Based Passive Bistatic Radar

“…To fully exploit the detection potential of the PBR system, an effective solution is to "make use of local resources", which means utilizing the military navigation and communication signals, such as the Joint Tactical Information Distribution System (JTIDS) [19][20][21] for target sensing. In particular, for the sake of obtaining excellent electronic countercountermeasure (ECCM) performance, these signals always have the characteristics of frequency agility (FA) and a high pulse repetition frequency (HPRF) [22].…”