상세정보
학술대회
A novel predistorter for power amplifier
- 발행일
- 200208
- 출처
- International Conference on Microwave and Millimeter Wave Technology (ICMMT) 2002, pp.1129-1133
- 협약과제
- 02MR3700, 초고속 위성통신에서의 효율적인 전송 기술, 김수영
- 초록
- In this paper, we propose a novel predistortion scheme with the aid of a piecewise polynomial modeling of the AM/AM and AM/PM characteristics for an high power amplifier (HPA). Multiple polynomials are used to predistort the input signal instead of a single one, by dividing the input signal range into several regions. For a HPA model we considered, we optimized the number of regions, subdivision points and order of polynomial functions in each region to increase the predistortion performance without an increase of computational load. From the simulation results investigated in this paper, the proposed method showed about a 0.5 dB gain in total degradation compared to a conventional polynomial predistortion method.
- KSP 제안 키워드
- High power amplifier(HPA), Input signal, Piecewise polynomial, Polynomial Modeling, Predistortion method, computational load, each region, polynomial function, power amplifiers(PAs), simulation results, total degradation(TD)