Method and system for detecting a plurality of targets of phased array secondary radars

Abstract

The invention relates to the field of secondary radars, in particular to a method and a system for detecting a plurality of targets of phased array secondary radars. The method comprises steps of receiving information about targets to be detected sent from an information source sensor; gathering and grouping the targets according to the information about targets to be detected, determining a pointing direction of each group of beams sequentially according to grouping sequence and forming a beam scheduling strategy; according to the beam scheduling strategy, sequentially scheduling beams to transmit inquiry signals and receive target response signals, and resolving the received target response signals to complete detection on the targets. By making the inquiry strategy to control transmission times and pointing directions of the beams, detection on the plurality of targets can be achieved in non-interfering inquiry beams in batches, false alarm or leak detection caused by the fact that the targets to be detected are positioned in covering critical regions of the beams can be avoided, introduction of ambiguity results caused by the fact that one target is covered by a plurality of beams is prevented, the accuracy rate of detection on the plurality of targets is increased, and precision of applications such as monopulse angle measurement is improved.

Description

technical field [0001] The invention relates to the technical field of secondary radar, in particular to a phased array secondary radar multi-target detection method and system. Background technique [0002] The secondary surveillance radar system is referred to as the secondary radar. This system is specially designed to complete the task of detecting and identifying targets. Its mechanism is to use the transponder to respond to the electromagnetic waves emitted by the interrogator to detect, locate and identify the target. The air traffic control radar system Secondary radar is its typical application. According to the working principle of secondary radar, while target detection is combined with related technologies, applications such as azimuth measurement, distance measurement, height measurement, identification, and speed measurement can be realized. Monopulse technology is a common method for current secondary radar target detection and angle measurement, including ph...

AI Technical Summary

Problems solved by technology

When the vector signals are intertwined, the phase and amplitude of the response signal of a single target are difficult to separate, resulting in the inability to correctly distinguish the target to be detected; An error has occurred resulting in incorrect angle measurements

At the same time, for multi-target detection under the phased array system, there is currently no guiding standard for beam scheduling, which may cause ambiguous results in repeated target detection during multi-target detection, and affect detection efficiency at the same time, or because the target is located at the beam boundary False alarms or missed detections

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