상세정보
학술대회
Design of CMOS Continuous-Time Low-pass Delta-Sigma Modulator for Digital Distributed Antenna System based on IF-over-Fiber Transmission
- 발행일
- 201702
- 출처
- International Conference on Advanced Communication Technology (ICACT) 2017, pp.835-838
- 협약과제
- 16MF1200, (통합)초연결 스마트 서비스를 위한 5G 이동통신 핵심기술개발, 정현규
- 초록
- A CMOS continuous-time low-pass delta-sigma modulator (DSM) circuit that digitizes an analog mobile signal at 10 MHz intermediate frequency (IF) in a digital distributed antenna system (DAS) with IF-over-fiber scheme is designed in this paper. Detailed design processes and results from system to circuit levels are provided, which is helpful for the design of a DSM circuit for another digital DAS system based on DSM technique. The simulated peak signal-to-noise and distortion ratio of the designed DSM circuit was 49.4 dB, and high stop-band rejection ratios were achieved by exploiting the zero optimization technique in the noise transfer function of the designed DSM.
- KSP 제안 키워드
- Band Rejection, Continuous-Time, DAS system, Delta-Sigma Modulator, Design process, Distortion ratio, Fiber transmission, Intermediate frequency, Noise Transfer Function, Optimization techniques(OT), Signal-to-Noise