低轨增强对北斗量化信号载噪比的影响  

Impact of LEO navigation augmentation for the carrier⁃to⁃noise ratio of quantized BDS signal

作　　者：宋玉龙 杨春宝 SONG Yulong;YANG Chunbao(School of Electronics and Information Engineering,South China University of Technology,Guangzhou 510610,China;Guangzhou Jingwei Tianteng Microelectronics Technology Co.,Ltd.,Guangzhou 510670,China;Guangzhou Haige Communications Group Incorporated Company,Guangzhou 510670,China)

机构地区：[1]华南理工大学电子信息学院,广东广州510610 [2]广州晶维天腾微电子技术有限公司,广东广州510670 [3]广州海格通信集团股份有限公司,广东广州510670

出　　处：《电子设计工程》2025年第1期154-159,165,共7页Electronic Design Engineering

基　　金：国家自然科学基金重大项目课题(62192712)。

摘　　要：为了评估频点兼容下低轨增强对北斗信号接收的影响,从而指导接收机设计,通过概率统计理论推导了低轨增强下北斗信号的量化效应和载噪比损耗模型,并通过蒙特卡罗仿真给出了1~6 bit量化位宽下北斗信号的载噪比损耗与前端增益以及低轨增强功率的关系,仿真与理论结果的一致性较好。实验结果表明,北斗信号最小载噪比损耗对应的最优前端增益与低轨增强功率无关,但最小载噪比衰减值会随着低轨信号功率的增强而增大,1~2 bit量化位宽下有明显的量化损耗,3 bit及以上量化位宽下北斗信号载噪比衰减特性基本一致。In order to evaluate the impact of Low Earth Orbit(LEO)navigation augmentation signal on the receiving of BeiDou navigation satellite system(BDS)signal,and to guide the receiver design,the quantization effect and carrier⁃to⁃noise ratio loss model of BDS signal affected by LEO augmentation is derived on the basis of probability and statistics theory,and Monte Carlo simulation is utilized to present the relationship of the BDS signal carrier⁃to⁃noise loss,the front⁃end gain and the LEO power enhancement at 1~6 bit quantization bit⁃width.The theoretical and simulation results agree well.According to the experimental results,the optimal front⁃end gain is independent of the LEO power enhancement,while the minimum carrier⁃to⁃noise loss will be more and more larger with the increase of LEO signal power,and the quantization loss is noticeable at 1~2 bit quantization bit⁃width,while the characteristics of BDS signal carrier⁃to⁃noise ratio loss at 3 bit and above are basically the same.

关 键 词：低轨增强 北斗 概率统计理论 量化效应 载噪比损耗模型 蒙特卡罗仿真 

分 类 号：TN967.1[电子电信—信号与信息处理]