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Mono-pulse angle estimation method for DDMA-MIMO radar target

A radar target and angle estimation technology, which is applied in radio wave measurement systems, instruments, etc., can solve the problems of increased calculation amount and reduced performance of radar target angle estimation, and achieves the effect of reducing the amount of calculation, small amount of calculation, and high precision.

Active Publication Date: 2016-03-30
XIDIAN UNIV
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Problems solved by technology

[0006] However, when the conventional monopulse method is used to estimate the radar target angle, when the radar target deviates from the center of the beam or there is strong interference and clutter in the echo, the performance of the radar target angle estimation will be significantly reduced; if the estimation accuracy is to be improved, the will greatly increase the amount of calculation

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  • Mono-pulse angle estimation method for DDMA-MIMO radar target
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  • Mono-pulse angle estimation method for DDMA-MIMO radar target

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Embodiment Construction

[0026] refer to figure 1 , is the flowchart of the inventive method, a kind of monopulse angle estimation method of DDMA-MIMO radar target, comprises the following steps:

[0027] Step 1. Obtain and store a radar echo signal without a radar target within a coherent processing interval, and store the main beam cone angle of the radar array antenna at the current moment, and then collect a radar echo signal with a radar target within a coherent processing interval, Carry out space-time adaptive processing (STAP) to the radar echo signal that there is radar target again, obtain the data matrix after space-time adaptive processing (STAP), select the data after described space-time adaptive processing (STAP) The lth range gate and kth Doppler channel data in the matrix are used as the radar target data vector x.

[0028]Among them, x is MN×1 dimension, M represents the total number of radar transmitting elements, N represents the total number of radar receiving elements, l∈{1,2,…,...

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Abstract

The invention discloses a mono-pulse angle estimation method for a DDMA-MIMO radar target, comprising the following steps: acquiring a radar echo signal containing no radar target and the main beam angle of a radar array antenna at the current moment; collecting a radar echo signal containing a radar target, and performing space-time adaptive processing of the radar echo signal to get a data matrix after space-time adaptive processing; selecting a radar target data vector, and getting a radar main beam direction parameter on the basis; calculating a radar transmitting array space steering vector and a receiving array space steering vector, getting a radar beam steering vector, and getting a radar difference beam steering vector; performing PD processing of the radar echo signal containing no radar target to get a radar echo signal after PD processing; and selecting a data matrix, getting an inverse covariance matrix of the data matrix, getting a radar beam power vector and a radar difference beam power vector according to the inverse covariance matrix, and further getting the optimal estimated value of the direction parameter of the radar target and the estimated value of the angle of the radar target.

Description

technical field [0001] The invention belongs to the technical field of radar target angle detection, and particularly relates to a method for estimating the monopulse angle of a DDMA-MIMO radar target, that is, a method for estimating the monopulse angle of a radar target with multi-transmit and multi-receive space-slow time coded signals, which is mainly applicable to miscellaneous Precise estimation of radar target angle after rough positioning of DDMA-MIMO radar target in wave background. Background technique [0002] Early warning aircraft plays an extremely important role in modern warfare, making the technology of early warning aircraft an important indicator to measure the military strength of a country's air force; when the airborne early warning radar is in downward-looking mode, the intensity of ground clutter echoes is relatively strong, and can even reach 60 ~90dB, coupled with the fast speed of the carrier aircraft, the clutter Doppler frequency range is greatly...

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Application Information

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IPC IPC(8): G01S7/292
CPCG01S7/2921
Inventor 吴建新牛芊芊王彤
Owner XIDIAN UNIV
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