机载脉冲辐射源的精确时延测量

Precise Time Delay Measurement for The Airborne Pulse Radiation Source

在长基线多站时差定位系统中,由于辐射源相对于不同的站存在不同飞行速度,导致各站接收信号存在多普勒差异,从而影响对辐射源的精确时延测量。研究了采用联合时延多普勒估计和广义互相关方法进行多普勒补偿并准确估计时延的方法。分析结果表明联合时延多普勒估计更适合于精确时延估计的要求。

In the long baseline multi-station time difference location system,the radiation source exists different flight speeds relative to the different stations, which results in the Doppler difference among the received signals from each station, therefore has an bad influence on the precise time delay measurement for the radiation source. This paper researches the method to compensate the Doppler difference and estimate the time delay accurately by means of the joint time delay Doppler estimation（JTDDE） algorithm and generalized cross correlation algorithm. The analyzing result shows that the JTDDE method is more suitable for accurate time delay estimation.