在多基地雷达系统中,同步问题包括时间同步和频率同步,如何使得异地之间的时钟同步是我们必须研究的问题。所谓时间同步,是使2个时钟对准,或者是确切知道2个时钟的钟差,在后续处理中补偿这个钟差。时间同步有很多方法,其中时间双向比对法,由于对站点的精确性依赖性小,受外界环境影响小,通过短时间比对和处理就可以获得较高的时间同步精度,因此它已被ITU组织作为全球时间传递和比对的标准。

Time synchronization and frequency synchronization are two problems in multi-static radar system.Synchronizing the time between different radar sites is an exigent subject of multi-static radar system.Time synchronization means accurate alignment of two clocks,or accurate awareness of time difference between two clocks so as to compensate the difference in following processing.There are many methods used for thime synchronization.Among these,the method of thime two-direction comparison has already been adopted by ITU organization as the standard for global time transmission and comparison,because this method features low dependence on accuracy of station,low influence from outside environment,and high accuracy of time synchronization based on short time of comparison and process.

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