한국지능시스템학회:학술대회논문집 (Proceedings of the Korean Institute of Intelligent Systems Conference)
- 한국퍼지및지능시스템학회 2003년도 추계 학술대회 학술발표 논문집
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- Pages.118-121
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- 2003
퍼지로직을 이용한 CDMA 중계기의 High Power Amp 설계
Designing High Power Amp for CDMA-Repeater used Fuzzy Logic
- Kim, Sung-Sik (School of Information Technology Eng. Korea University of Technology and Education) ;
- Cho, Hyun-Chan (School of Information Technology Eng. Korea University of Technology and Education) ;
- Oh, Chang-Heon (School of Information Technology Eng. Korea University of Technology and Education) ;
- Lee, Kyu-Young (VSWR Inc. Co.)
- 발행 : 2003.09.01
초록
Generally, the repeater in CDMA(Code Division Multiple Access) included HPA(HI-Power Amplifier) to amplifier communication signals. Also , HPA contained PD(Predistortor) to maintain the linearization of amplifier characteristics. A configuration component of PD have been used electricity nonlinear devices such that diode. But this diode takes many influences at the circumstance temperature. Consequently, it can't maintain output linearization, and drop the communication quality. The manufacturer set bias of the circuit to the manual at the first out of ware-house low But the Q-point changes according to the change of the high temperature or low temperature. Therefore, we designed a system to maintain the Q-point by FDM(Fuzzy Decision Maker) in this paper.