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一种减少频率槽的同步码捕获方法
张剑,黄媛媛,周兴建,卢建川
0
(中国西南电子技术研究所,成都610036;四川大学锦城学院,成都 611731)
摘要:
针对大动态下同步码实时捕获中频率槽过多、硬件资源消耗大的问题,提出了一种减少频率槽数量的同步码捕获方法。新方法将频率槽数量减小一半后,利用频率槽中的同步码相关值进行多普勒的估计和多普勒补偿,将补偿后的数据进行同步码捕获。理论分析和仿真验证表明,新算法在完成相同的同步码捕获性能下,基本将硬件资源降低到了原有系统的一半。
关键词:  窄带通信  同步码捕获  大动态  多普勒补偿
DOI:
基金项目:
Code synchronization with less frequency slots
ZHANG Jian,HUANG Yuanyuan,ZHOU Xingjian,LU Jianchuan
(Southwest China Institute of Electronic Technology,Chengdu 610036,China;Jincheng College of Sichuan University,Chengdu 611731,China)
Abstract:
This paper proposes a code synchronizing method to reduce the consumption of computation resources by using less frequency slots in large dynamic environment.Doppler frequency shift is estimated by using the code correlation results of every frequency slot.Then the code synchronization is performed after the compensation of Doppler frequency shift.The theoretical analysis and simulation demonstrate that the new code synchronization scheme achieves the same performance with half number of frequency slots.
Key words:  narrowband communication  code synchronization  dynamic environment  Doppler frequency shift compensation
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