Passive Location Technology Based on Helicopter-borne Radar Warning Equipment
The helicopter-borne radar warning equipment only has the function of rough direction finding without the capability of target positioning.In order to improve electromagnetic situational awareness,it is necessary to achieve the passive,high-precision and fast positioning of airborne single station.A correlation curve fitting interpolation method is proposed to improve the measurement accuracy of phase difference and time difference.Through the design of the rotating Doppler positioning method applicable to different scenarios and the positioning method based on phase difference change rate,the adaptable upgrade and improvement of the software and hardware is conducted in the antenna components,the microwave processing units and the signal processing units of the existing four-channel digital radar warning equipment,enabling the passive,high-precision and fast positioning of the airborne radar warning equipment when it is confronted with the radiation source.
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