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FDA-MIMO radar signal processing method and device based on STPC, and medium

A radar signal processing and signal technology, applied in the field of computer storage media, frequency diversity array multi-input multi-output radar signal processing, can solve the problem of limited performance of adaptive clutter cancellation

Active Publication Date: 2020-08-07
NORTHWEST UNIV(CN)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although Code Division Multiple Access (CDMA) waveforms have been used to recover transmit degrees of freedom for ground-based FDA-MIMO radars, their adaptive clutter cancellation performance is very limited in airborne space-time adaptive processing radars

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  • FDA-MIMO radar signal processing method and device based on STPC, and medium
  • FDA-MIMO radar signal processing method and device based on STPC, and medium
  • FDA-MIMO radar signal processing method and device based on STPC, and medium

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Embodiment Construction

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

[0031] The technical solution of the embodiment of the present invention utilizes the strong correlation of the slow-time phase encoding waveform as the transmit waveform of the FDA-MIMO radar, thereby expecting to improve the airborne space-time adaptive processing radar clutter cancellation performance, and combining the transmit Waveform, a new signal processing mode is proposed, which is expected to successfully solve the problem of the range-dimensional emission degree of freedom recovery of FDA-MIMO radar.

[0032] Based on the above elaboration, see figure 1 , which shows a STPC-based FDA-MIMO radar signal processing method provided by an embodiment of the present invention, the method comprising:

[0033] S11: Construct the transmit signal of FDA-MIMO radar based on S...

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Abstract

The embodiment of the invention discloses an FDA-MIMO radar signal processing method and device based on STPC, and a medium. The method can comprise the following steps: constructing a transmitting signal of FDA-MIMO radar based on STPC; receiving a receiving signal after the transmitting signal is influenced by clutter; carrying out down-conversion processing on the signal after the emission freedom degree of the received signal is extracted by utilizing a carrier frequency to obtain a baseband signal of the received signal; separating from the baseband signal of the received signal accordingto fast Fourier transform to obtain a transmitted waveform signal; carrying out frequency correction on the transmitted waveform signal obtained by separation, and then carrying out matched filteringto obtain a received echo signal; after the distance dependence of the emission space frequency is compensated for the echo signal, obtaining a self-adaptive weight vector through a Lagrange multiplier method; weighting the echo signal by using the adaptive weight vector to obtain a weighted signal to be estimated; and obtaining estimated values of a distance gate where the target is located andan arrival direction based on the to-be-estimated signal.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of radar signal processing, and in particular to a Frequency Diversity Array Multiple Input Multiple Output (FDA-MIMO, Frequency Diversity Array–Multiple-Input Multiple -Output) radar signal processing method, device and computer storage medium. Background technique [0002] The detection and localization of moving targets are the most important tasks that airborne radar systems need to achieve. Due to the movement of the platform where the airborne or spaceborne radar is located, its main lobe and side lobe clutter will be diffusely distributed in a wide Doppler frequency range, which will cause the moving target of interest to the radar, especially the slow moving The target is overwhelmed by the scattered carrier. In order to improve the detection performance of moving targets, especially slow moving targets, Space-Time Adaptive Processing (STAP, Space-Time Adaptive Processing) tec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41
CPCG01S7/41G01S7/414
Inventor 文才许世浩彭进业乐明楠
Owner NORTHWEST UNIV(CN)