스위칭 전력 증폭기 구동을 위한 디지털 송신장치
이성준, 박봉혁, 정재호, 오스트로브스키, 샤잇 요한 크리
- 9025700 (2015.05.05)
- A digital polar modulator (DPM) for transforming a baseband signal into a modulated digital modulator output signal comprises an input unit and two low-pass delta-sigma modulators, a first one being connected downstream from the first input part and configured to provide at its output a first pulse train in dependence on an amplitude- modulating baseband signal component, and a second one being connected downstream from the second input part and configured to provide at its output a multilevel quantized signal in dependence on a phase modulating baseband signal component; a multiphase generator, which is configured to provide a set of square-wave carrier signals having a common carrier frequency and exhibiting discrete phase shifts with respect to each other; a multiplexer, which is configured to provide a multiplexer output signal that is formed by switching, in dependence on a signal received at a select input as a function of time, between selected ones of the carrier signals; and a combiner unit.
- KSP 제안 키워드
- Carrier frequency, Common carrier, Delta-Sigma Modulator, Digital Modulator, Discrete phase, Phase shift, Pulse train(PT), RF Power, RF power amplifier, Switch Mode, baseband signal, delta-sigma, low pass, multiphase generator, polar modulator, power amplifiers(PAs), square wave