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학술지 Wideband and Multiband Long-term Evolution Transmitter using Envelope Delta-sigma Modulation Technique
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저자
조영균, 박봉혁, 김철영
발행일
201704
출처
Analog Integrated Circuits and Signal Processing, v.91 no.1, pp.155-162
ISSN
0925-1030
출판사
Springer
DOI
https://dx.doi.org/10.1007/s10470-017-0926-2
협약과제
16MF1100, 차세대 무선통신용 반도체 기반 스마트 안테나 기술 개발, 박봉혁
초록
This letter presents a fully integrated tri-state radio frequency (RF) modulator for wideband and multiband long-term evolution (LTE) transmitters. The quantization noise was effectively reduced by using an envelope modulator equipped with a single-opamp resonator, thereby improving the wideband efficiency and linearity. Broadband design techniques with RF building blocks enable multiband operation. A power amplifier with dual mode supply was designed to confirm the effectiveness of the proposed scheme. The RF modulator was implemented in a 130혻nm CMOS process with an active area of 3.4혻mm2. At carrier frequencies from 960혻MHz to 3혻GHz for a 20-MHz LTE signal, the measured coding efficiency, adjacent channel leakage ratio, and error vector magnitude were found to exceed 71%, ?닋36 dBc, and 3.9%, respectively.
키워드
Envelope delta-sigma modulation, Long-term evolution transmitter, Multiband, Radio frequency modulator, Wideband
KSP 제안 키워드
Active area, Adjacent channel leakage ratio(ACLR), Building block, CMOS Process, Coding efficiency, Design techniques, Dual-Mode, Envelope modulator(EM), Frequency modulator, Fully integrated, Long term Evolution(LTE)