이재문, 임재성, 안희수, "고속 도플러 편이 환경에서 최적 시간지연을 갖는 다중모드 모노펄스 신호처리에 관한 연구",한국군사과학기술학회지, 한국군사과학기술학회, Vol. 19, No. 5, pp. 582-589, 2016
Multi-mode monopulse system is widely used for satellite terminal like UAV because of high tracking accuracy and low size/weight profile. In
order to calculate tracking error, Multi-mode monopulse system utilizes high-order mode signal, and it should have enough C/N(carrier to noise)
level therefore tracking system needs narrow band filtering of received satellite beacon signal as much as possible. However, UAV suffers for
beacon frequency drift derived from Doppler effect due to satellite figure 8 movement and UAV maneuvering. Therefore wideband signal
processing needs to be considered in advance for exact doppler compensation and consequent time delay. In this paper, we propose the
multi-stage Digital Signal processing system for beacon signal, which could minimize the signal delay under high Doppler and low C/N condition.