전력증폭기의 비선형 특성과 Memory Effect 를 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
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4,000원
원문정보
초록
영어
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.
목차
Abstract I. 서론 II. Pre-distortion linearizer architecture III. Memory polynomial IV. Implementation 1. Digital pre-distorter 2. Signal capture module 3. Processor V. Technical issues 1. Delay estimation 2. Adaptation VI. 실험 결과 VII. 결론 참고문헌