Array radar system adaptively selecting transmitting array elements according to target distance

Abstract

The invention discloses an array radar system adaptively selecting transmitting array elements according to a target distance. The array radar system includes an antenna feedback subsystem, a signal processing subsystem, a terminal subsystem, a monitoring subsystem, a time sequence controller and a transmitter; the terminal subsystem sends a key target distance to the monitoring subsystem; the monitoring subsystem adaptively selects forming codes according to the key target distance, and delimits key target adjacent areas; the time sequence controller generates transmitting signals; the transmitter amplifies and filters the transmitting signals so as to generate transmitting radio-frequency signals, and generates phase-shift codes according to the positions of the array elements; the antenna feedback subsystem transmits a radio-frequency signal sequence and receives a radio-frequency reflection signal sequence; a receiver performs frequency mixing processing on the radio-frequency reflection signal sequence so as to obtain a baseband orthogonal double-path signal sequence, and transmits the baseband orthogonal double-path signal sequence to the signal processing subsystem; the signal processing subsystem performs beam-forming and pulse compression on the baseband orthogonal double-path signal sequence, and identifies a key target, and feeds back the distance, height and azimuth deviation information of the key target to the terminal subsystem.

Description

technical field [0001] The invention belongs to the technical field of radar system emission control, in particular to an array radar system for adaptively selecting emission array elements according to target distance, which is suitable for practical engineering applications. Background technique [0002] Array signal processing is an important branch in the field of signal processing. It sets multiple sensors at different positions in space to form a sensor array, and uses this array to receive (multi-point parallel sampling) and process the spatial signal field. Array signal processing is different from general signal processing. The array is a sensor group arranged in a certain way in different positions in space. It mainly uses the signal space characteristics to enhance the signal and effectively extract the signal space information. Therefore, array signal processing is also called space space. signal processing. [0003] For array radars, the position and number of ...

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Problems solved by technology

Therefore, for the method of fixed array elements, the beam is narrow, and it takes a long time to search an elevation angle area. It is difficult to make the target fall in the main beam, which is not conducive to the search or tracking of short- and medium-range targets.

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