Abstract
This research studies the effects of three noise jamming techniques on the performance of a hybrid multistatic radar network in a selection of different electronic warfare (EW) situations. The performance metrics investigated are the range and velocity estimation errors found using the Cramér-Rao lower bounds (CRLBs). The hybrid multistatic network simulated is comprised of a single active radar transmitter, three illuminators of opportunity (IO), a receiver co-located at the active transmitter site, and two separately located silent receivers. Each IO transmits at a unique frequency band commonly used for civilian applications, including Digital Video Broadcasting-Terrestrial (DVB-T), Digital Audio Broadcasting (DAB), and FM radio. Each receiver is capable of receiving signals at all three IO frequency bands as well as the operating frequency band of the active radar transmitter. The investigations included compare the performance of the network at detecting a single airborne target under conditions where different combinations of jammer type, operating mode, directivity, and number of operating jammers are used. The performance degradation of the system compared to operation in a non-contested environment is determined and a comparison between the performance of the hybrid multistatic radar with that achievable by a monostatic radar and an active-only multistatic radar network within a selection of contested scenarios is made. Results show that the use of spatially distributed nodes and frequency diversity within the system enable greater theoretical functionality in the presence of jamming over conventional radar systems.
Highlights
M ULTISTATIC hybrid radar networks combine the use of multiple transmitter and receiver nodes within a spatially distributed system capable of operating in both active and passive modes in a cooperative way
The average Root Cramér-Rao lower bounds (RCRLB) for range and velocity estimations across the entirety of each simulation for each Tx-Rx pair are presented for every scenario investigated
The theoretical improvements achievable in RCRLB for both range and velocity by the hybrid multistatic radar network over an active monostatic radar (Tx1-Rx1 pairing) and an active-only multistatic radar (Tx1 paired with any receiver) are shown
Summary
M ULTISTATIC hybrid radar networks combine the use of multiple transmitter and receiver nodes within a spatially distributed system capable of operating in both active and passive modes in a cooperative way. Such systems offer greater area coverage, multiple observation perspectives, frequency diversity and simultaneous multiple role functionality. They are of particular interest within military contexts as they offer a number of key advantages over conventional systems, including graceful degradation, covertness due to silent receivers located separately from active transmitters and the capability to perform passive sensing using signals from illuminators of opportunity (IO), thereby creating a radar system which is more resilient to adversarial jamming while maintaining the ability to use active monostatic modes when necessary [1]. The ambiguity function (AF) and the Cramér-Rao lower bounds (CRLB) on radar measurement parameters are highly effective performance metrics
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