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Emission waveform design method of conformal MIMO radar system under multi-path condition

A technology of radar system and transmitting waveform, which is applied in the field of radar, can solve the problems of main lobe deformation, side lobe elevation of conformal array antenna, and decrease of detection performance of conformal array radar system, etc., to achieve multi-degree-of-freedom effect

Active Publication Date: 2015-11-11
XIDIAN UNIV
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Problems solved by technology

Due to the existence of multipath problems, the transmission pattern of the conformal array antenna will have problems such as side lobe elevation and main lobe deformation, which seriously reduces the detection performance of the conformal array radar system.
Although conformal phased array radar can alleviate the impact of multipath problems by designing and transmitting beamforming steering vectors, the effect is still limited

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  • Emission waveform design method of conformal MIMO radar system under multi-path condition
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  • Emission waveform design method of conformal MIMO radar system under multi-path condition

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Embodiment Construction

[0020] Reference figure 1 The method for designing the transmission waveform of a conformal array MIMO radar system under multipath conditions of the present invention includes the following specific steps:

[0021] Step 1. The detection range of the azimuth angle θ of a given conformal array MIMO radar system is [θ min , Θ max ], and the pitch angle The detection range is Set the number of elements N of the conformal array antenna, where the phase compensation of the i-th element relative to the phase center of the conformal array antenna is The electric field intensity of the i-th element is i=1, 2,..., N; the conformal array MIMO radar system includes the conformal array antenna.

[0022] Step 2. For the i-th element of the conformal array antenna, set the number of multipath points contained in it as M i , Where the radiation intensity of the m-th multipath point is f i, m , The scattering amplitude of the m-th multipath point is β i, m , The phase compensation of the m-t...

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Abstract

The invention discloses an emission waveform design method of a conformal MIMO radar system under a multi-path condition, comprising steps of giving a detection range of an azimuth Theta of a conformal matrix MIMO, wherein the detection range is [Theta min, Theta max], and a detection range ( Phimin Phimax) of a pitch angle Phi, and setting quantity of matrix elements of the conformal matrix antenna as N, (2) setting the quantity of multi-path points contained by the ith matrix elements of the conformal antenna as Mi, (3) setting an expected detection direction (Thetad Phid ) of the conformal matrix MIMO radar system and setting a main lobe width W Theta of the emission direction image expected by the conformal array MIMO radar system on the direction dimension and a main lobe width (wPhi)of the pitching dimension, and calculating the emission direction map Bp expected by the conformal matrix MIMO radar system, (4) constructing the design norm of the wave form matrix S of the conformal MIMO radar system according to the emission direction map Bp expected by the conformal matrix MIMO radar system, and (5) obtaining the wave form matrix S <->of the conformal array MIMO radar system.

Description

Technical field [0001] The invention belongs to the field of radar technology, and particularly relates to a method for designing a transmission waveform of a conformal array MIMO radar system under a multipath condition, and is used for designing a transmission pattern of a conformal array MIMO radar under a multipath condition. Background technique [0002] Conformal array antenna refers to an array antenna whose array surface matches the shape of the carrier platform. Compared with the traditional planar array antenna, the special array manifold of the conformal array antenna keeps the orientation of each element in line with the surface normal of the element carrier platform, so that the beam scanning range of the conformal array antenna is from the plane array The range of ±60° solid angle that the antenna can usually scan is extended to the range of ±90° solid angle, and even to full space coverage, which can significantly increase the radar's field of view; in addition, th...

Claims

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Application Information

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IPC IPC(8): G01S7/282
CPCG01S7/282
Inventor 刘宏伟周生华曹鼎臧会凯张可
Owner XIDIAN UNIV
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