Broadband radar system and array optimization method for low-altitude target detection based on pitch mimo

Abstract

The invention discloses a low-altitude target detection broadband radar system based on pitching MIMO and an array optimization method. By combining the frequency phase position comprehensive coding synthetic broadband signal processing technology and the sparse MIMO array signal processing technology, highly efficient and high-precision detection on a low-altitude target can be achieved. The system comprises an antenna branch system, a transceiving assembly branch system, a radio frequency channel branch system, a waveform generation branch system, a frequency synthesizer branch system, a signal processing branch system and a display control terminal branch system. The waveform generation branch system generates six-channel middle-frequency signals through a digital-to-analog conversion DAC playing board card. The middle-frequency signals are in the form of frequency phase position composite coding signals. The six-channel middle-frequency signals enter the frequency synthesizer branch system and pass through the radio frequency channel branch system, the transceiving assembly branch system and ten antenna branch system, so emission wave beams are formed. The transceiving assembly branch system receives echo signals of the target. The echo signals pass through the radio frequency channel branch system, the frequency synthesizer branch system and the signal processing branch system, so an one-dimensional distance image and primary point tracks are obtained.

Description

technical field [0001] The invention belongs to the technical field of radar systems, and in particular relates to a wide-band radar system for low-altitude target detection based on elevation MIMO and an array optimization method thereof. Background technique [0002] Broadband radar can provide rich target information, has high target detection and recognition capabilities, and has strong anti-clutter and anti-jamming capabilities. Phased array radar can perform fast electronic scanning, and at the same time, it can use adaptive beamforming technology to form zero point and suppress interference. [0003] When using radar to detect low-altitude targets, because there are many obstacles near the ground, they are interfered and blocked by a large number of radar reflections from ground objects. Therefore, in the low-altitude detection field of radar, the detection efficiency and accuracy are restricted. Contents of the invention [0004] In view of this, the present inven...

AI Technical Summary

Problems solved by technology

Phased array radar can perform fast electronic scanning, and at the same time, it can use adaptive beamforming technology to form zero points for interference suppression. Its performance is far superior to traditional radars, but at the cost of high cost, high power consumption, and high technical requirements.

[0003] When using radar to detect low-altitude targets, because there are many obstacles near the ground, they are interfered and blocked by radar reflections from a large number of ground objects. Therefore, in the low-altitude detection field of radar, the detection efficiency and accuracy are restricted.

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