摘要
针对时差定位系统中影响定位精度的关键因素——时差测量精度,分析了时差测量误差的来源,提出利用链路转发技术,将副站截获到的雷达信号转发到主站,避免了时统误差。同时利用浮动门限对视频脉冲进行高精度整形以减小触发误差,并采用脉冲计数与内插采样相结合的方法,有效地克服了传统脉冲计数法带来的量化误差,从而达到提高时差测量精度、改善时差定位系统定位精度的目的。
TDOA errors are important factors that restrict the precision of time-difference location systems. On the basis of analyzing the cause of TDOA errors,a method of transmiting with link transmit is proposed, which avoids the time unified errors. At the same time, video pulses are shaped by floating threshold and triggering errors are reduced. A method of associating pulse counter with interpolating sampling is put forward and it eliminates the quantization errors generated by traditional pulse counter. As a result,TDOA measurement accuracy is enhanced and a better solution of the time- difference location system is obtained.
出处
《航天电子对抗》
2009年第2期48-50,共3页
Aerospace Electronic Warfare
关键词
到达时间差
链路转发
浮动门限
内插采样
TDOA
link transmit
floating threshold
interpolating sampling
