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Transmission waveform design method of conformal array mimo radar system under multipath conditions

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

Active Publication Date: 2017-05-24
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

Method used

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  • Transmission waveform design method of conformal array mimo radar system under multipath conditions
  • Transmission waveform design method of conformal array mimo radar system under multipath conditions
  • Transmission waveform design method of conformal array mimo radar system under multipath conditions

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Embodiment Construction

[0020] refer to figure 1 , the transmitting waveform design method of the conformal array MIMO radar system under the multipath condition of the present invention, comprises the following concrete steps:

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

[0022] Step 2. For the i-th array element of the conformal array antenna, set the number of multipath points it contains to be M i , where the radiation intensity of the mth multipath point is f i，m , the scattering amplitude of the mth multipath point is β i，m , the ...

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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 technical field of radars, and in particular relates to a method for designing a transmission waveform of a conformal array MIMO radar system under multipath conditions, which is used for designing a transmission pattern of a conformal array MIMO radar under multipath conditions. Background technique [0002] The conformal array antenna refers to the array antenna whose array surface conforms to 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 array element consistent with the normal direction of the surface of the array element carrier platform, so that the beam scanning range of the conformal array antenna ranges from The range of the ±60° solid angle that the antenna can usually scan is extended to the range of ±90° solid angle, and even extended to the full space coverage, which can significantly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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