摘要
实际物理信道的幅频特性与相频特性会对载波相位估计精度产生影响,以往的文献少有对此问题进行分析。文章建立等效低通滤波器hl(t)为复函数的一般模型,分析了信道特性对于载波相位测距精度的影响;并在实际的导航接收机上进行了验证,实验结果与理论分析的变化趋势吻合较好。分析模型与分析方法可推广用于通道非理想特性对于载波相位零值的影响,进而指导最优信道的设计。
The non-ideal characteristics of actual receiving channel,including amplitude-frequency response and phase-frequency response,have influence on carrier phase estimation ranging,but the prevenient literatures have done little work on it.This paper establishes the complex function model for hl（t）,which is the channel equivalent low pass filter,analyzes the impact of non-ideal characteristics on carrier phase ranging measurement;then,the paper verifies the analysis conclusion on an actual navigation receiver.Experiment results agree quite well with the variation trend of theoretical analysis.The analytic model and method in this paper can be extended to analyze the impact of channel non-ideal characteristic on the zero value of carrier phase;furthermore,it can direct the design of optimal channels.
出处
《信息工程大学学报》
2011年第1期48-54,共7页
Journal of Information Engineering University
基金
教育部"新世纪优秀人才支持计划"资助项目(NCET-08-0144)
关键词
导航接收机
载波相位
测距精度
非理想特性
navigation receiver
carrier phase
ranging measurement
non-ideal characteristic
