Convex optimization algorithm-based radar array sum-difference beam directional diagram optimization method

A convex optimization algorithm and beam pattern technology, applied in the field of radar, can solve problems such as local optimal solution and slow algorithm convergence speed, and achieve the effect of easy engineering implementation, simple steps, and suppression of interference

Active Publication Date: 2017-05-31
XIDIAN UNIV
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Problems solved by technology

For the beam pattern optimization of circular arrays, the comprehensive algorithms mainly used include genetic algorithm, simulated annealing algorithm, particle swarm algorithm, and ant colony algorithm. These algorithms are essentially random-...

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  • Convex optimization algorithm-based radar array sum-difference beam directional diagram optimization method
  • Convex optimization algorithm-based radar array sum-difference beam directional diagram optimization method
  • Convex optimization algorithm-based radar array sum-difference beam directional diagram optimization method

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[0025] refer to figure 1 , is a flow chart of the present invention based on a radar array and difference beam pattern optimization method based on a convex optimization algorithm; wherein the radar array and difference beam pattern optimization method based on a convex optimization algorithm comprises the following steps:

[0026] Step 1. Determine that the radar circular array containing M array elements is evenly distributed on the circle with radius R, and then calculate the direction vector of the radar circular array; M and R are positive integers greater than 0 respectively.

[0027] Specifically, it is determined that the radar circular array containing M array elements is evenly distributed on a circle with a radius of R according to the serial numbers of the array elements, wherein the M array elements are respectively non-directional; and the distance from the set position of the radar circular array is There is a signal source at , where the set position is that th...

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Abstract

The invention discloses a convex optimization algorithm-based radar array sum-difference beam directional diagram optimization method. The method comprises the steps of determining that a radar circular array containing M array elements is uniformly distributed on a circumference with the radius being R, and then determining a sum beam main lobe area, a sum beam null steering area, a sum beam side lobe area, a sum beam low side lobe area, a difference beam main lobe area, a difference beam null steering area, a difference beam side lobe area and a difference beam low side lobe area; respectively obtaining a cost function for restraining the sum beam main lobe area and a cost function for restraining the difference beam main lobe area; further obtaining a sum beam directional diagram comprehensive optimization model of the radar circular array and a difference beam directional diagram comprehensive optimization model of the radar circular array, and calculating a radar circular array sum beam optimal weight vector; sequentially obtaining a slope of an angle error normalization curve of an expected target and a curve slope of an angle error curve of a radar circular array sum-difference beam directional diagram to be optimized, and calculating an optimal weight vector of a radar circular array difference beam.

Description

technical field [0001] The invention belongs to the field of radar technology, in particular to a radar array and differential beam pattern optimization method based on a convex optimization algorithm, which is suitable for radar circular array and beam and differential beam pattern optimization. Background technique [0002] With the development of radar technology, phased array radar is more and more applied to practical engineering projects. However, the current phased array radar antennas are basically linear array and traditional planar array antennas. The structure of the line array is relatively simple and easy to handle, but in practice it can only cover an azimuth angle of about 120 degrees, and its characteristics such as gain and pattern vary with the scanning angle, especially the scanning angle When the direction deviates from the normal direction of the array, the performance of the array drops sharply, so these greatly limit its application range. The tradit...

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Application Information

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IPC IPC(8): G01S7/02
CPCG01S7/02
Inventor 曹运合张奕凤宏晓苏洪涛周生华
Owner XIDIAN UNIV
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