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Slow time FDA radar signal processing method and device based on multiple mixers, medium and radar system

A radar signal processing and slow time technology, applied in the radar field, can solve the problem that the phase information of the transmitting antenna cannot be recovered

Pending Publication Date: 2021-09-17
NORTHWEST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the FDA-MIMO technique cannot recover the range-dependent phase information of the transmit antenna due to the elimination of the range-dependent phase information during the matched filtering process where the transmit antenna beamforming moves to the receive antenna end

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  • Slow time FDA radar signal processing method and device based on multiple mixers, medium and radar system
  • Slow time FDA radar signal processing method and device based on multiple mixers, medium and radar system
  • Slow time FDA radar signal processing method and device based on multiple mixers, medium and radar system

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Embodiment Construction

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0036] In recent years, multiple-input multiple-output (MIMO, Multiple In Multiple Out) radars have attracted extensive attention. Compared with conventional STAP radar, MIMO radar has shown many advantages, mainly including increased spatial degrees of freedom, more accurate angle estimation, reduced minimum detectable velocity (MDV) and lower probability of intercept (LPI). However, it is worth emphasizing that in order to obtain a reliable signal-to-noise ratio (SNR), the accumulation time of a MIMO radar is typically M times that of a conventional STAP radar, where M is the number of transmit antennas. Furthermore, in the case of range ambiguity, target localization usually requires multiple interleaved pulse repetition frequencies (PRFs), which means that relativ...

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Abstract

The embodiment of the invention discloses a slow time FDA radar signal processing method and device based on multiple mixers, a computer storage medium and a radar system. The method comprises the steps of carrying out the down-conversion of each channel signal in a received signal for each receiving antenna in a receiving array of a frequency diversity array FDA, and obtaining a baseband signal corresponding to each channel, after the baseband signal corresponding to each channel is approximated based on a set approximation strategy, conducting matched filtering on the approximated baseband signal corresponding to each channel by using the transmitting signal corresponding to each channel, and acquiring pulse compression output of each channel for the distance unit, and acquiring a slow time signal component in the pulse compression output of each channel for the distance unit and a Doppler frequency corresponding to each slow time signal component by using the emission spatial frequency defined to be related to the distance.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of radar, and in particular, to a method, device, computer storage medium, and radar system for processing a slow time frequency diversity array (FDA, Frequency Diversity Array) radar signal based on a multi-mixer. Background technique [0002] The detection and localization of moving targets are the most important tasks that the airborne radar system needs to achieve. The main lobe and side lobe clutter of an airborne or spaceborne radar will spread over a wide range of Doppler frequencies due to the motion of the platform on which it is located, resulting in moving targets that are of interest to the radar, especially slow-moving targets. The target is overwhelmed by the scattered carrier waves. In order to improve the detection performance of slow moving targets, Space Time Adaptive Processing (STAP, Space Time Adaptive Processing) technology is usually used, which combines multiple...

Claims

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Application Information

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IPC IPC(8): G01S7/282
CPCG01S7/282
Inventor 文才桑书影彭进业
Owner NORTHWEST UNIV