CDR을 사용한 FPGA 기반 분산 임베디드 시스템의 클록 동기화 구현
An Implementation of Clock Synchronization in FPGA Based Distributed Embedded Systems Using CDR
1
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
Time synchronization between distributed embedded systems in the Real Time Locating System (RTLS) based on Time Difference of Arrival (TDOA) is one of the most important factors to consider in system design. Clock jitter error between each system causes many difficulties in maintaining such a time synchronization. In this paper, we implemented a system to synchronize clocks between FPGA based distributed embedded systems using the recovery clock of CDR (clock data recovery) used in high speed serial communication to solve the clock jitter error problem. It is experimentally confirmed that the cumulative time error that occurs when the synchronization is not performed through the synchronization logic using the CDR recovery clock can be completely eliminated.
Abstract
Time synchronization between distributed embedded systems in the Real Time Locating System (RTLS) based on Time Difference of Arrival (TDOA) is one of the most important factors to consider in system design. Clock jitter error between each system causes many difficulties in maintaining such a time synchronization. In this paper, we implemented a system to synchronize clocks between FPGA based distributed embedded systems using the recovery clock of CDR (clock data recovery) used in high speed serial communication to solve the clock jitter error problem. It is experimentally confirmed that the cumulative time error that occurs when the synchronization is not performed through the synchronization logic using the CDR recovery clock can be completely eliminated.
참고문헌 (12)
- J. Elson, "Fine-grained Network Time Synchronization Using Reference Broad-casts", ACM Operating Systems Review, 36(SI), pp.147~163 (2002)
- S. Ganeriwal, "Timing-sync Protocol for Sensor Networks", Proceedings of the International Conference on Embedded Networked Sensor Systems, pp.138~149 (2003)
- M. Marooti, "The Flooding Time Synchronization Protocol", Proceedings of the International Conference on Embedded Networked Sensor Systems, pp.39~49 (2004)
- 박세훈, "CMOS 링발진기의 전원 잡음에 의한 위상잡음과 Jitter 연구", 한국정보통신학회논문지, 10(2), pp.298~302 (2006), 한국정보통신학회
- 김재완, "정밀 시각동기를 이용한 TDoA 기반의 위치 탐지", 한국통신학회논문지C, 38(2), pp.141~154 (2013), 한국통신학회
- 전종목, "네트워크 기반 임베디드 시스템을 위한 IEEE1588 시간동기 구현", 대한임베디드공학회논문지, 9(1), pp.33~41 (2014), 대한임베디드공학회[DOI]