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학술지 A New Network Synchronizer Using Phase Adjustment and Feedforward Filtering Based on Low-Cost Crystal Oscillators
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저자
성창경, 이승우, 최우영
발행일
201007
출처
IEEE Transactions on Instrumentation and Measurement, v.59 no.7, pp.1764-1774
ISSN
0018-9456
출판사
IEEE
DOI
https://dx.doi.org/10.1109/TIM.2009.2028758
협약과제
08MR2400, 멀티미디어 컨버전스 네트워크 온칩 기술 개발, 이범철
초록
A new network synchronizer using a two-way message exchange is proposed and implemented in a field-programmable gate array (FPGA). This synchronizer aligns its clock signal and time of day to that of the master node. For high-precision frequency control, a new phase adjustment method is employed, which efficiently provides high-frequency resolution and deterministic frequency control gain. In addition, a feedforward filter is used to reduce dithering of the time offset due to quantization errors in time-stamping. Even with a low-cost crystal oscillator, successful synchronization with root-mean-square (RMS) jitters of 0.1856 unit interval is achieved. © 2006 IEEE.
키워드
Filters, Global Positioning System (GPS), Networks, Phase control, Synchronization
KSP 제안 키워드
Adjustment method, Control gain, Crystal Oscillator, Field Programmable Gate Arrays(FPGA), Frequency Resolution, Frequency control, High Frequency(HF), Low-cost, Master Node, Message exchange, Phase control