Abstract
다중 빔 탐색 레이다는 디지털 빔 형성 기술을 이용하여 수신시 적층 빔을 형성하는 최신의 3D(3 Dimensional) 레이다 기술이다. 본 논문에서는 다중 빔 3D 레이다의 빔 형성기 설계 개념 및 다중 경로 현상이 없는 정상 환경 상태에서 표적 고도 추출 방법을 제안하고 고찰해 보고자 한다. FFT(Fast Fourier Transform)수신 빔형성기에서 안테나 정현 공간(sine space) 좌표계 기반으로 표적 고도 추출 알고리듬에 대해 기술하였다. 제안된 알고리듬은 1개의 look-up 테이블을 이용하여 다양한 고도 및 레이다 주파수 대역에 대해서 일치하는 결과가 나오는 것을 시뮬레이션으로 확인하였다. The multibeam surveillance radar is a state-of art of 3D radar technology. It applies the stacked beam-on-received realized by a digital beamformer. In this paper, a design concept of beamformer and a method of target altitude extraction for multibeam surveillance radar in the normal environmental condition considering no multipath situations are proposed and investigated. The extraction algorithm based on antenna sine space coordinated system in a FFT digital beamformer is described. The proposed algorithm is simulated by 1 look-up table data and confirmed to have consistent results in accordance with a variety of target altitudes and a full radar frequency range.
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