지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국전자파학회JEES Journal of Electromagnetic Engineering And Science Journal of The Korea Electromagnetic Engineering Society Vol.2 No.1
- 발행연도
- 2002.5
- 수록면
- 1 - 4 (4page)
이용수
초록· 키워드
오류제보하기
Performance improvement of the DS-CDMA system by the spectrum-overlap is important for batter service quality or more system capacity. In this paper, an analysis for capacity improvement is newly considered when the Lanczos chip waveform is used for the spectrum-overlapped DS-CDMA system. RC(relative capacity) is the ratio of the capacity of overlapping system to that of non-overlapping system, which is used for the expression of the capacity improvement. the optimal overlapping ratio is numerically found to make the maximum capacity improvement. When the rectangular chip waveform is used for the overlapping system, maximum capacity improvement is increased by about 10% at the required BER=10?³and the optimal overlapping ratio is 1.23. When the 95% power bandwidth is considered for the Lanczos chip waveform, maximum capacity improvement is increased by 34.4% at overlapping ratio of 1.55 when the required BER is 10?³. The lower required BER for the better communication quality makes gradually smaller capacity improvement.
목차
Abstract
I. Introduction
II. Spectrum-Overlapped DS-CDMA System
III. Chip Waveforms
IV. Numerical Results and Discussions
V. Conclusion
References
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