원문정보
Look-up Table type Digital Pre-distorter for Linearization Power Amplifier with Non-linearity and Memory Effect
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
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