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作 者:周天润 王振岭[1] 徐胜良[2] 刘亚廷 ZHOU Tianrun;WANG Zhenling;XU Shengliang;LIU Yating(The 54th Research Institute of China Electronics Technology Group Corporation,Shijiazhuang 050081,China;Unit 32380 of PLA,Beijing 100072,China;Langfang District Military Representative Office,Rocket Force Equipment Department of PLA,Langfang 065000,China)
机构地区:[1]中国电子科技集团公司第54研究所,石家庄050081 [2]中国人民解放军第32380部队,北京100072 [3]火箭军装备部驻廊坊地区军事代表室,河北廊坊065000
出 处:《计算机测量与控制》2025年第2期254-261,共8页Computer Measurement &Control
摘 要:空基区域导航增强系统是一种卫星导航系统的有效辅助与补充手段,其信号设计是影响增强定位精度的重要因素;针对系统对导航卫星辅助增强与独立定位的需求,以北斗系统为应用背景,给出了一种能够与北斗卫星信号兼容的区域增强信号设计建议;根据兼容性需求分析结果,对频点、扩频码与电文格式等进行了选择和设计;针对增强系统中可能存在的远近效应,提出了脉冲调制的优化方式,根据信号参数设计适用于空基区域增强信号的脉冲信号占空比,并设计相适应的脉冲图案;仿真结果表明,采用脉冲信号形式的区域增强信号能够与北斗卫星信号实现兼容,卫星信号比区域增强信号弱30 dB时能够正常捕获,减弱远近效应的影响。Aircraft-based regional navigation augmentation system is an effective auxiliary and supplementary means for satellite navigation systems,and its signal design is an important factor influencing the accuracy of augmentation positioning.To address this issue,,based on the application background of the Beidou system,a regional augmentation signal design compatible with the Beidou satellite signal is presented.According to the requirement of compatibility analysis,the carrier frequency,spread spectrum codes,and navigation message formats are carefully selected and designed.In terms of the potential near-far effect in the augmentation system,an optimization method for pulse modulation is proposed.The duty cycle of pulse signal suitable for enhancing signals in the spatial region is designed based on the signal parameters,and the corresponding pulse pattern is developed.Simulation results demonstrate that the pulse regional augmentation signal is compatible with the Beidou satellite signal.Furthermore,when the satellite signal is 30 dB weaker than the regional augmentation signal,it can be captured normally and the impact of the near-far effect is reduced.
关 键 词:区域导航增强 信号设计 远近效应 脉冲调制 增强载荷
分 类 号:TN967.1[电子电信—信号与信息处理]
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