상세정보
학술대회
Advanced Class-S Transmitter with Tri-level Delta-Sigma Modulator
- 발행일
- 201311
- 출처
- Asia-Pacific Microwave Conference (APMC) 2013, pp.1015-1017
- 협약과제
- 13VI1600, 차세대 이동통신 기지국용 Class-S 전력증폭기 기술 연구, 정재호
- 초록
- An advanced Class-S transmitter based on a tri-level delta-sigma modulator (DSM) is presented. The second order DSM shows a signal-to-noise and distortion ratio (SNDR) of 44.7 dB and a spurious-free dynamic range (SFDR) of 63.6 dB with a 3.1-MHz sinusoidal input at 522.24-MS/s using an offset cancellation scheme. The proposed technique improves the SFDR and SNDR over 10 dB and 3 dB, respectively. The proposed scheme can effectively control the input referred offset voltage of the DSM, resulting in the improvement of spectrum efficiency. The power consumption of the modulator is 13.4 mW from a 1.2 V supply. Measurements with a mixer show that the proposed modulator modulates a 10-MHz long-term evolution signal which has an 8.5 dB peak-to-average ratio with 3.30 % error vector magnitude and 38.7 dB adjacent channel leakage ratio at 2.6 GHz. © 2013 IEEE.
- KSP 제안 키워드
- 2.6 GHz, Adjacent channel leakage ratio(ACLR), Advanced class-S transmitter, Delta-Sigma Modulator, Distortion ratio, Long term Evolution(LTE), Power Consumption, Signal-to-Noise, Spectrum efficiency, error vector magnitude, offset cancellation