一种基于IEEE 802.11p系统的联合粗细时间同步算法

A joint coarse and fine timing synchronization method based on IEEE 802.11p system

提出了一种基于IEEE 802.11p标准的在高速车载移动环境下保持良好时间同步性能的联合粗细时间同步方法。粗时间同步是基于短前导码的自相关,细时间同步利用了滑动窗口和互相关技术来完成准确的时间同步。MATLAB仿真结果表明,所提出的方案在车辆速度为89.7 km/h与200.1 km/h时比其他三种同步方案的误比特率减少了12.5%;在车辆速度为126.3 km/h^200.1 km/h时,同步位置的均方差比其他三种同步方案减少了20.1%。

The paper proposes a joint coarse and fine timing synchronization method based on IEEE 802.11p system to cope with the high mobility environment. The coarse timing synchronization is based on short preambles autocorrelation and the fine tim ing synchronization utilizes the sliding window and cross correlation technique to locate the accurate synchronization position. After simulation by matlab, the result shows that the bit error rate of the proposed scheme is less than others by 12.5% at least at speed from 89.7 km/h to 200,1 km/h; the MSE of synchronization position of the proposed scheme is less than others by 20.1%at least at speed from 126.3 km/h to 200.1 km/h.