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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 통신위성우주산업연구회 Joint Conference on Satellite Communications Joint Conference on Satellite Communications 2000년
- 발행연도
- 2000.1
- 수록면
- 163 - 168 (6page)
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초록· 키워드
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This paper proposes an interference cancellation scheme for multimedia satellite communication systems, and presents results of hardware experiments on the scheme. In order to achieve higher frequency utilization efficiency, the high-speed TDM forward link signal and the low-speed spread spectrum FDMA return link signals are superposed. The conventional interference cancellation scheme utilizes a replica signal whose amplitude, phase and timing are fixed. It is virtually impossible to adjust them properly because factors such as equipment performance and propagation conditions vary irregularly. The proposed scheme is able to generate an accurate replica by utilizing a delay variation compensator and an adaptive filter. The results of a hardware experiment show that the proposed interference cancellation scheme holds the degradation in the return link signal to less than 3dB, when D/U is greater than -37dB.
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