一种空-地双基地雷达时间同步方法

Time Synchronization in Air-Ground Bistatic Radar

空-地双基地雷达发射机置于运动的空中平台上,对时间同步精度要求高、实现难度大。为此,在现有时间同步技术基础上,研究了适用于空-地双基地雷达时间同步方法,确定了易于实现的间接同步方案。为满足同步精度要求,在传统单一时钟授时的基础上,利用卫星授时信号对内部高稳晶振进行校准,提高了同步精度。为验证该方案的可行性,选取频率计CNT-90及TimeView软件对同步模块进行测量,结果验证了这种方法满足同步精度要求,能够应用于空-地双基地雷达时间同步。

Air-ground bistatic radar＇s transmitter is placed on a moving aerial platform.Time synchronization is difficult to achieve and demands a high accuracy requirement.Methods of time synchronization are studied in this article.After analysis and selection of the methods,an indirect synchronization which is easy to implement is selected.On the basis of traditional methods for time service,the method using GPS to calibrate the high stability crystal oscillator is proposed.To verify the feasibility of the method,CNT-90 and Timeview is used to measure the synchronization module.The result of hardware experiment shows that this method can meet the accuracy requirements and can be used in air-ground bistatic radar time synchronization.