한국정보통신설비학회:학술대회논문집
- 한국정보통신설비학회 2008년도 정보통신설비 학술대회
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- Pages.218-222
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- 2008
전력증폭기의 비선형 특성과 Memory Effect를 보상하기 위한 Look-up Table 방식의 Digital Pre-distorter
Look-up Table type Digital Pre-distorter for Linearization Power Amplifier with Non-linearity and Memory Effect
- Choi, Hong-Min (LG-Nortel System H/W Department) ;
- Kim, Wang-Rae (LG-Nortel System H/W Department) ;
- Lyu, Jae-Woo (LG-Nortel System H/W Department) ;
- Ahn, Kwang-Eun (LG-Nortel System H/W Department)
- 발행 : 2008.08.29
초록
RF power amplifier requires linearization in order to reduce adjacent channel interference. And most of the existing linearization algorithms assume that a PA has memory-less nonlinearity. But for the wider bandwidth signal, the memory effect of PA cannot be ignored. This paper investigates digital pre-distortion by use of a memory polynomial model which compensates for amplifier nonlinearity and memory effect. The look-up table based implementation scheme is used to reduce the computational complexity of the pre-distortion block. The linearization performance is demonstrated on wideband CDMA signal and class AB high power amplifier.