Abstract
Recently, passive bistatic radar (PBR) has become an emerging technology because it allows target detection and localization with advantages of low cost, covert detection, low vulnerability to electronic jamming and high valuable counter to stealth technology. However, these researchers mainly focus on the illuminators of opportunity such as FM radio, television broadcast, mobile network basestation, wireless fidelity, long term evolution, global navigation satellite, etc. Different from the aforementioned illuminators, this paper introduces a new PBR using a non-cooperative frequency agile phased array radar illuminator. The types of illuminator of opportunity are enriched, whereas the difficulties in PBR signal processing also come along. On one hand, since PBR works in a non-cooperative mode, there is a problem that the instantaneous parameters of transmitting signal are unknown at the receiver. On the other hand, the frequency agility technology destroys the coherency between pulses and the ability of rapidly changing beam scanning makes it difficult for PBR to realize space synchronization. Under such scenarios, conventional radar signal processing methods cannot be conducted effectively. To address these problems, this paper then proposes a feasible target detection and localization method, which is tested by field experiments. Preliminary results validate the proposed method can be applied to PBR system successfully.
Highlights
Passive bistatic radar (PBR) is a bistatic radar application where the system has no own transmitters but needs to exploit illuminators of opportunity for target detection and location
Many researchers have been working on this topic for developing algorithms and applications with different illuminators of opportunity, such as FM radio broadcasting [3], television broadcast [4]–[8], mobile network basestation [9], wireless fidelity (WIFI) [10], global navigation satellites [11], [12], long term evolution (LTE) [13], and so on
EXPERIMENTAL RESULTS AND ANALYSIS In order to investigate the performance of the presented PBR system and the associated signal processing method, filed experiments have been carried out to detect and locate aircrafts near an international airport, in which a UHF band frequency agile phased array air surveillance radar illuminator is exploited as non-cooperative transmitter
Summary
Passive bistatic radar (PBR) is a bistatic radar application where the system has no own transmitters but needs to exploit illuminators of opportunity for target detection and location. Frequency agility and phased array antenna technology are widely used in radar system design for air surveillance purpose because it can provide flexible beam scanning and improved detection probability [14]–[16]. P. Hu et al.: Target Detection and Localization Using Non-Cooperative Frequency Agile Phased Array Radar Illuminator needs to be used for time and frequency synchronization. Motivated by the previous works, we present a new PBR system using non-cooperative frequency agile phased array radar illuminator as the transmitter, and propose a simple and efficient signal processing method for target detection and localization. PROBLEMS USING NON-COOPERATIVE FREQUENCY AGILE PHASED ARRAY RADAR ILLUMINATOR The presented PBR is consist of a surveillance antenna, a reference antenna and a receiver. In order to achieve target detection and localization with the PBR system, it is necessary to propose a feasible method to solve the previous signal processing problems
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