METHOD FOR DETECTING TARGETS AND ASSOCIATED MULTIFUNCTION RADAR
First Claim
1. A method for detecting aerial targets, implemented by a multifunction radar comprising an antenna subdivided into at least two antenna portions, each antenna portion being configured to perform the transmission and the reception of a signal, the method comprising:
- each antenna portion of the radar is configured to transmit signals on distinct frequency bands,during the transmission phases of an antenna portion, the reception of each antenna portion of the radar is cut resulting in a reception signal comprising missing data,the radar is configured to simultaneously perform at least two radar functions including an aerial target detection function,and wherein the method comprises, for each range gate;
a step of reception of signals,a step of estimation, from the signals received, of a space-time autocorrelation matrix so as to model the spurious ground echoes,a step of target detection using a statistical test by taking into account missing data in the reception signals and said space-time autocorrelation matrix.
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Accused Products
Abstract
A method for detecting targets, implemented by a multifunction radar wherein the radar comprises an antenna subdivided into at least two portions and is configured to transmit at least two types of signals on distinct frequency bands and to perform at least one ground detection or imaging function. During the transmission phases of an antenna portion, the reception of each antenna portion of the radar is cut. The method comprises, for each range gate, a step of reception of signals, a step of estimation of the autocorrelation matrix associated with the interferences the ground returns and from the thermal noise of the radar and a step of target detection using a test of the generalized maximum likelihood. A multifunction radar configured to implement the method for detecting targets is provided.
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Citations
12 Claims
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1. A method for detecting aerial targets, implemented by a multifunction radar comprising an antenna subdivided into at least two antenna portions, each antenna portion being configured to perform the transmission and the reception of a signal, the method comprising:
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each antenna portion of the radar is configured to transmit signals on distinct frequency bands, during the transmission phases of an antenna portion, the reception of each antenna portion of the radar is cut resulting in a reception signal comprising missing data, the radar is configured to simultaneously perform at least two radar functions including an aerial target detection function, and wherein the method comprises, for each range gate; a step of reception of signals, a step of estimation, from the signals received, of a space-time autocorrelation matrix so as to model the spurious ground echoes, a step of target detection using a statistical test by taking into account missing data in the reception signals and said space-time autocorrelation matrix. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification