콘텐츠 본문
논문 해외 국제전문학술지(SCI급) Stair-type parallel digital predistorter for power amplifier linearisation and harmonic reduction
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2021-02
- 저자명 정의림공동(제1),정진곤,오혁준
- 학술지명 International Journal of Electronics Letters
- 발행처명 Taylor and Francis Ltd.michael.wagreich@univie.ac.at
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 3
논문 초록 (Abstract)
In this study, cognitive radio systems are examined. As it is difficult to include all the candidate frequency bands of the wide spectrum of the primary channel using the filtering approach, we propose a stair-type parallel predistortion (PD) and implement it using a commercial wideband Gallium Nitride power amplifier. Parallel predistorters centred at different integer multiples of are used for constructing the PD to effectively reduce spectral regrowth of the fundamental signal as well the harmonics at different frequencies. Experimental results demonstrate that the spectral regrowth at GHzand harmonic at 2GHz are reduced by 15dBand 10dB , respectively. The obtained results establish the proposed PD with parallel predistorters as a predistortion technique for dynamic spectrum allocation systems such as cognitive cellular systems and CR networks.
