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两类抗干扰模式下卫导接收机时延补偿方案

Two Types of Time Delay Compensation Methods for Satellite Navigation Receiver in Anti-jamming Mode
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摘要 抗干扰处理是提高卫星导航性能的重要方法,而抗干扰处理模块计算最优权值所产生的时延是导致卫星导航授时精度下降的重要因素。针对这一问题,文章提出了两类抗干扰模式下卫导接收机时延补偿方案。第一类方案为硬件补偿方案,通过测定不同频段下抗干扰处理的时延,取大于最大抗干扰时延的某一常值为固定时延,在接收机端对该固定时延进行补偿进而达到提高授时精度的目的,该方案工程s可实现性较强,已应用于工程实践。第二类方案是将抗干扰时延值扩维进状态变量,并假设其为常值,在接收机授时算法中对该常值状态变量进行估计和补偿,该方案仅需对授时算法进行升级,可为后续工程设计提供参考。 The anti-jamming processing is the crucial method of improving performance of satellite navigation,however,the time delay caused by weight calculation in anti-jamming module leads to the degradation of the time service accuracy of satellite navigation.Aiming at this problem,this paper proposed two types of method to compensate the time delay caused by anti-jamming processing for satellite navigation receiver.The first kind is to realize the compensation through hardware method,by testing the time delay in different frequency bands,the compensation value of time delay is obtained from the maximum value of the tested values,by compensating the fixed time delay,the time service accuracy is enhanced which has a relevant higher value in engineering implementation.The second kind is to implement in receiver software,by extending the time delay into the state variables and assume it is a constant,the time delay is estimated and compensated through the time service algorithm.The method only need to upgrade the time service algorithm,which can be a reference for the engineering design.
作者 吴琼 WU Qiong(The 10th Research Institute of China Electronics Technology Group Corporation,Chengdu 610036,China)
出处 《长江信息通信》 2023年第12期107-109,共3页 Changjiang Information & Communications
关键词 抗干扰 卫星导航 时延 授时精度 anti-jamming satellite navigation time delay time service accuracy
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