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Simulation Of Direction Finding Algorithm And Estimation Of Losses In An RWR System

Journal: International Journal of Scientific & Technology Research (Vol.3, No. 8)

Publication Date:

Authors : ; ;

Page : 29-32

Keywords : Index Terms RWR; direction finding; Gaussian noise; amplitude comparison; phase loss; cable loss; radar; AOA.;

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Abstract Radar warning receiver RWR systems are used to detect radio emissions of radar systems. Its primary purpose is to issue a warning when a radar signal that might be a threat is detected and subsequently evade it. RWR systems can be installed in all kind of airborne sea-based and ground-based assets and is used for identifying avoiding evading or engaging threats. This paper focuses mainly on airborne military RWR systems. The RWR usually has a visual display somewhere prominent in the cockpit to provide visual cues to the pilot regarding the position of the incoming threat. A suitable method of direction finding is required to detect the position of the threat. In this paper the design of the radio direction finder is based on amplitude comparison to find the angle of arrival AOA of the received signal by four antennas circularly distributed. The characteristics of the signal maximum amplitude and frequency are specified to provide the identification of the source in addition to the direction. The AOA is determined by taking the ratio of the signal amplitudes between two adjacent antennas due to their associated AOA over 360 degrees direction. This system operates in a wide band of frequency over 2-18GHz. Software simulations are carried out to validate and find the DF accuracies of the algorithms under various conditions. The effect of external Gaussian white noise cable losses and phase losses are simulated and studied.

Last modified: 2015-06-28 03:59:43