Beam Steering Method of Large-Scale Conformal Digital Phased Array

Abstract

The invention discloses a beam control method for a large-scale conformal digital phased array. The beam control method is flexible in beam control and high in tracking precision. According to the technical scheme, a wave control computer can forecast the data information according to logic beam signals and track forecast data and then the pointing angle of the task target position information iscalculated. An activated array element is selected by utilizing an obtained pitch angle and azimuth angle sliding window. The corresponding serial number of the array element and the pointing angle are transmitted to a secondary DBF module through optical fibers. The coordinates of the activated array element are searched by the secondary DBF module through utilizing an activated array element number lookup table. The phase shifting value and the sub-array time delay parameter of a phase shifter corresponding to the activated array element are calculated in the distributed manner. Meanwhile, the time delay line parameter configuration of a sub-array stage time delay filter is completed. The related information of the serial number of the activated array element and the phase shifting valueare transmitted to a primary DBF module through optical fibers. The primary DBF module completes the phase shifting parameter configuration of the activated array element, activates the parameters ofan array element binding phase shifter and realizes the control of beam resources.

Description

technical field [0001] The invention relates to a beam control method of a large-scale conformal digital phased array (that is, the number of array elements reaches tens of thousands) which is mainly used in an aerospace measurement and control system and can simultaneously have multiple beams. Background technique [0002] Digital beamforming (DBF) is a comprehensive technique in many fields such as array antenna and signal processing. DBF implements multi-beam forming by using DSP or FPGA on the baseband to complete the weighted summation operation of the signals of each array element. With the rapid development of digital multi-beam and phased array technology, conformal digital phased array has realized the function of simultaneous multi-beam synthesis. The conformal phased array antenna adopts the electronically controlled scanning method, which has fast scanning speed, flexible beam control, strong anti-interference ability, and can complete multiple functions such as...

AI Technical Summary

Problems solved by technology

At the same time, as the scale of the phased array increases, the beam control system becomes more and more complex. At this time, the conventional centralized calculation method puts a huge pressure on the digital signal processor, which seriously affects the response time of the beam control.

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