Radar conformal array phased array wave control code calculation method

Abstract

The invention discloses a radar conformal array phased array wave control code calculation method, which comprises the steps: obtaining phase matching of a conformal area array based on a phase matching scheme of a conformal linear array and a triangular linear array, completing calculation of radial phase matching in Matlab, and storing a calculation result in a field programmable logic gate array; according to the relative position of the reference point in the array, calling a multiplier in the field programmable logic gate array to complete the calculation of axial phase matching; and reading radial phase matching which is stored in the field programmable logic gate array and corresponds to the direction of a certain wave beam, reading a preset correction phase at the same time, and adding the radial phase matching, the axial phase matching and the correction phase to obtain the wave control code of the array element at the relative position. According to the invention, the beam pointing precision is improved, the resource consumption is reduced, the beam pointing angle is flexible, and the reliability is high.

Description

technical field [0001] The invention relates to the technical field of radar signal processing, in particular to a radar conformal array phased array wave control code calculation method. Background technique [0002] The main function of the beam control system is to calculate the phase shift amount of each array element phase shifter on the array. The beam control system has many design structures. According to the beam control algorithm, it can be divided into look-up table method and real-time solution algorithm. The look-up table method generally adopts the whole hardware design method, which is suitable for the occasions where the system is simple, the function is single, the pointing angle is small, and the pointing accuracy is not high. The advantage is that the system is simple, the reliability is high, and the cost is low. With the increase of the number of elements and the increase of the pointing angle, the amount of stored data is greatly increased, so it is dif...

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Problems solved by technology

The look-up table method generally adopts the whole hardware design method, which is suitable for the occasions where the system is simple, the function is single, the pointing angle is small, and the pointing accuracy is not high. The advantage is that the system is simple, the reliability is high, and the cost is low. With the increase of the number of elements and the increase of the pointing angle, the amount of stored data is greatly increased, so it is difficult to realize the high pointing accuracy and complex working mode of large-scale arrays; the real-time calculation method needs to calculate the axial matching and radial matching at the same time. There are multiplication and division in phase matching, which is difficult to implement in FPGA, and it takes up a lot of logic resources, and it is difficult to implement in hardware

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