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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, Envelope modulator(EM), Frequency modulator, Fully integrated, Long term Evolution(LTE), Quantization Noise