| Study on Multi-Mode Monopulse Signal Processing System Providing Optimal Time Delay under High Doppler Condition |
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Jaemoon Lee, Jaesung Lim, Huisoo Ahn |
1The 2nd Research and Development Institute, Agency for Defense Development
2Department of Computer Engineering, Ajou University
3Department of Communication, LIG Nex1 |
| 고속 도플러 편이 환경에서 최적 시간지연을 갖는 다중모드 모노펄스 신호처리에 관한 연구 |
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이재문, 임재성, 안희수 |
1국방과학연구소 제2기술연구본부
2아주대학교 컴퓨터공학과
3LIG넥스원(주) 통신연구센터 |
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| Abstract |
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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. |
| Key Words:
DSP, Doppler Compensation, Narrow Filtering, Time-Delay, Multi-Mode Monopulse |
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