一种高动态条件下短码快速捕获方法研究

Fast acquisition method for short code in high dynamic consensus

时延控制对于时间敏感信息传输至关重要,这些对时间敏感的目标的对抗往往处于高动态环境下,因此高动态条件下的快速捕获成为其实现低时延传输的基础。文中提出了一种具有开环结构的短码时频二维快速捕获方法。该方法利用载波瞬时测频方法进行频偏纠正,同时利用分段相关方法消除多普勒效应造成的相位偏差,最后利用匹配滤波方法实现伪码快速捕获。该捕获方法采用短码和开环结构,能更好地适应机载及武器动态协同等对通信时延敏感的应用场合。

The time delay control is critical for the transmit of time-sensitive information. The confrontations with time sensitive targets are often in a highly dynamic environment. therefore the rapid capture isthe basis of low time-delay communication in the high-dynamic situation. A time-frequency 2 D fast acquisition method for the short code and open-loop structure is proposed. The method uses the instantaneousfrequency measurement technique to modify the frequency shift. Meanwhile,a segmented correlation method is used to eliminate the phase bias caused by Doppler effect,and finally the match filter is utilized torealize fast capture. The capture method uses the short code and open-loop structure,thus it is suitable forthe communication time-delay sensitive application scenario,such as dynamic airborne weapon-cooperation.