PPO 알고리즘을 이용한 능동위상배열안테나적응형 고속 보정 방법
Adaptive Fast Calibration Method for Active Phased Array Antennas using PPO Algorithm
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초록
본 논문에서는 원전계 환경에서 위상배열안테나를 고속 보정하는 방법이 제안되었다. 원전계에서 수신된 전력만을 통해 각 안테나 요소를 보정하는 기존 rotating-element electric-field vector (REV) 방법을 간소화 한 최대값 보정 방법과, 각 안테나 요소가아닌 부배열 단위로 묶어서 보정하는 방법이 제안되었다. PPO 알고리즘을 이용하여 위상배열안테나의 분포에 최적화된 파티셔닝을찾고, 그에 따른 부배열 단위로 보정하여 기존 방법 대비 더 빠른 보정이 가능한 적응형 최대값 보정 방법이 제안 및 시뮬레이션검증되었다. 보정이 이루어지는 동안 위상배열안테나의 이득이 더 높을 뿐 아니라, 형성되는 빔 패턴이 기존 방법보다 이상적인 빔패턴에 더 가깝다
Abstract
In this paper, a high-speed calibration method for phased array antennas in the far-field is presented A maxcalibration, which is a simplification of the rotating-element electric-field vector (REV) method that calibrateseach antenna element only through received power, and a method of grouping calibrations by sub-array unitrather than each antenna element were proposed. Using the Proximal Policy Optimization (PPO) algorithm, wefound a partitioning optimized for the distribution of phased array antennas and calibrated it on a subarray basis. An adaptive max calibration method that allows faster calibration than the conventional method was proposed andverified through simulation. Not only is the gain of the phased array antenna higher while calibration is beingmade to the target, but the beam pattern is closer to the ideal beam pattern than the conventional method.
참고문헌 (13)
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