STPC-based fda-mimo radar signal processing method, device and medium

Abstract

The embodiment of the present invention discloses an STPC-based FDA-MIMO radar signal processing method, device, and medium; the method may include: constructing a transmit signal of the FDA-MIMO radar based on STPC; receiving a received signal after the transmit signal is affected by clutter ; Utilize the carrier frequency to carry out down-conversion processing on the signal after extracting the degree of freedom of the received signal to obtain the baseband signal of the received signal; separate and obtain the transmitted waveform signal from the baseband signal of the received signal according to the fast Fourier transform After frequency correction is carried out to the described separation and acquisition of the transmitted waveform signal, a matched filter is carried out to obtain a received echo signal; after the distance dependence of the transmitted spatial frequency is compensated for the echo signal, obtained from the Lagrangian multiplier method Adapting the weight vector; using the adaptive weight vector to weight the echo signal to obtain a weighted signal to be estimated; based on the signal to be estimated, obtaining an estimated value of a range gate and a direction of arrival of the target.

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...

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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