发明授权
- 专利标题: Clock recovery using a double-exponential smoothing process
- 专利标题(中): 使用双指数平滑处理的时钟恢复
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申请号: US10246408申请日: 2002-09-19
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公开(公告)号: US07020791B1公开(公告)日: 2006-03-28
- 发明人: James Aweya , Michel Ouellette , Delfin Y. Montuno , Kent E. Felske
- 申请人: James Aweya , Michel Ouellette , Delfin Y. Montuno , Kent E. Felske
- 申请人地址: CA Quebec
- 专利权人: Nortel Networks Limited
- 当前专利权人: Nortel Networks Limited
- 当前专利权人地址: CA Quebec
- 代理机构: Hunton & Williams LLP
- 主分类号: G06F1/12
- IPC分类号: G06F1/12 ; H04L7/00 ; H03L7/00
摘要:
A system and method for synchronizing a local clock to a reference clock using a linear model of the clock error between the local clock and the reference clock is disclosed. In one embodiment, a double-exponential smoothing process is used in conjunction with the linear model to estimate a frequency offset by which the frequency of an oscillator of the local clock is adjusted. Also disclosed herein is a phased-lock loop (PLL) adapted to synchronize a local clock with a reference clock using the double-exponential smoothing process, as well as a system implementing the PLL for timing the playout of data received from a transmitter.
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