| 刘靓1， 黄飞2， 明德祥2 |
（1. 同济大学 交通运输学院，上海 200092；2. 国防科技大学 三院，湖南 长沙 410073） |
 摘要：针对交通信息采集系统时钟频率的偏差估计问题，提出了使用Kalman滤波进行时钟频率偏差估计的算法。该算法计算量小，算法简单且频偏估计精度高。实验仿真证明了该算法的有效性。 |
| 关键词：交通信息采集系统; 时延; 频偏估计; Kalman滤波;时间序列 |
| 中图分类号：F252 文献标识码：A 文章编号：1000-8829(2008)05-0041-04 |
| Clock Frequency Offset Estimation of Traffic Information Collection System |
| LIU Liang1， HUANG Fei2， MING De-xiang2 |
| (1. College of Transportation Engineering,Tongji University,Shanghai 200092,China; 2. 3rd Institute,National University of Defense Technology,Changsha 410073,China) |
| Abstract：Aiming at the problem of clock frequency offset estimation of traffic information collection system,a clock frequency offset estimation algorithm with Kalman filtering was proposed.The proposed algorithm is simple in principle,and can obtain higher clock frequency offset estimation precision with less computation. Simulation results prove its validity. |
| Key words：traffic information collection system;time delay;frequency offset estimation;Kalman filtering;time series |
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