Direction-finding method and device for single-transmission double-receiving passive radar

Abstract

The invention provides a direction-finding method and device for single-transmission double-receiving passive radar, belongs to the technical field of radar, and is tended to solve the problem that fixed object direct-finding technique has high cost with safety easily threatened. The method comprises: setting a first receiver, a second receiver and a transmitter in a two-dimensional plane, and cycling the first receiver and the second receiver respectively around an origin; through equation (1), determining a transmitter, a direction-finding model of a first single-transmission single-receiving observation passage formed by the first receiver and a fixed target, and a direction-finding model of a second single-transmission single-receiving observation passage; normalizing first and second direction-finding results of the direction-finding model of the first single-transmission single-receiving observing passage respectively to obtain a frequency-domain direction-finding equation of the fixed target in the first single-transmitting single-receiving observation passage, and a frequency-domain direction-finding equation of the fixed target in the second single-transmitting single-receiving observation passage; through equation (2), acquiring direction-finding results of the fixed target.

Description

technical field [0001] The invention belongs to the technical field of radar, and in particular relates to a direction finding method and device for a single-transmission and dual-reception passive radar. Background technique [0002] Fixed target direction finding is mainly used in the military field, and it is an important content of enemy detection and battlefield reconnaissance. At present, the commonly used direction finding methods include real aperture radar direction finding and array radar direction finding. The angular resolution of real aperture direction finding is 0.89λ / D, where λ is the signal wavelength, and D is the real antenna aperture. The angular resolution of is 0.89λ / (Ndcosθ), Nd is the length of the array antenna, and θ is the angle between the beam direction and the normal direction of the array antenna. In order to improve the angular resolution, the direction finding system generally needs to increase the antenna aperture or array length, which gre...

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides a method and device for direction finding of a single-transmission and double-reception passive radar, which is used to solve the problem that the existing fixed target direction-finding technology has relatively high cost and security is easily threatened

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