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

作　　者：王徐华 李明阳[3] WANG Xuhua;LI Mingyang(School of Computer Science and Technology,Xidian University,Xi'an 710071,China;ATC Navigation College,The Air Force Engineering University,Xi'an 710051,China;Key Laboratory of National Defense Science and Technology for Aviation Complex Systems,Air Force Equipment Research Institute, Beijing 100071,China)

机构地区：[1]西安电子科技大学计算机科学与技术学院,陕西西安710071 [2]空军工程大学空管领航学院,陕西西安710051 [3]空军装备研究院航空复杂系统国防科技重点实验室,北京100071

出　　处：《南京邮电大学学报（自然科学版）》2018年第6期24-28,共5页Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition

基　　金：国家自然科学基金(61502523)资助项目

摘　　要：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.

关 键 词：时间敏感信息 开环结构 瞬时测频 分段相关 

分 类 号：TN919.8[电子电信—通信与信息系统]