Formation method of MIMO tracking radar emission wave beam based on radio frequency stealth

Abstract

The invention provides a formation method of a MIMO tracking radar emission wave beam based on radio frequency stealth and belongs to the communication radar technology field. Through designing a weighting coefficient of an orthogonal transmitting waveform, a directional wave beam is formed at a target azimuth and a zero limit of a width is formed along an interception receiver direction. And a discrete long ball sequence method is used to form a wide wave beam along a target direction so as to simultaneously detect a wide sector. Finally, according to a wave beam gain of each target direction, radar radiation detection is performed on minimum power needed by a target. Through null steering and radiation power, radio frequency stealth performance of a MIMO radar is controlled and increased so that multi-target tracking detection performance of the MIMO radar is guaranteed and simultaneously radio frequency stealth performance is increased.

Description

technical field [0001] The invention belongs to the technical field of communication radar, and in particular relates to a transmit beam forming method based on radio frequency stealth considerations in MIMO radar tracking mode. Background technique [0002] On the premise of ensuring the performance of the radar mission, reducing the transmission power of the radar is one of the main means to improve its radio frequency stealth performance. When working, the radar can obtain the location information of the intercepting receiver through cooperative sensors. If the energy distribution of the radar radiation can be made as small as possible in the direction of the intercepting receiver, the probability of the radar being intercepted can be reduced as much as possible. When considering the error in the position of the intercepting receiver obtained by the radar, in order to better improve the radio frequency stealth performance, it is necessary to make the radar transmit beam f...

AI Technical Summary

Problems solved by technology

At present, there are two main methods for MIMO radar transmit beamforming: the first is to design the covariance matrix of the signal first, and then synthesize the transmit signal with specific partial correlations through the obtained covariance matrix (FuhrmannDR, SanAntonioG. Transmit beamforming for MIMO radar systems using signal cross-correlation [J]. IEEE Transactions on Aerospace and Electronic Systems, 2008, 44 (1): 171-186; Sajid Ahmed, John S. Thompson, Yvan R. Petillot et al. Unconstrained Synthesis of Covariance Matrix for MIMO Radar Transmit Beam pattern [J], IEEE Transactions on Signal Processing, 2011: 389 () Space domain (beam) and time domain (signal) are coupled together, greatly increasing the difficulty of design

The second is to regard the transmitted signal as a weighted sum of a given set of orthogonal waveforms (John Lipor, Sajid Ahmed and Mohamed-Slim Alouini. .MIMORadarTransmitBeampatternDesignWithoutSynthesisingtheCovarianceMatrix[J].IEEETransactionsOnSignalProcessing,2014,62(9):2278-2289), the desired method diagram is obtained by designing the weighting matrix; in this method, it is not necessary to know the specific form of the waveform, as long as the waveforms are orthogonal , but the main purpose of this method is to improve the detection performance of the target, and it does not involve the radio frequency stealth performance of the radar

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