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中频载波对伪码测距精确度的影响分析

Analysis of the influence of IF carrier frequency in PN code ranging precision
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摘要 分析了数字接收机中频载波的频率对系统测距精确度的影响,当载波频率为伪码速率的整数倍时,测距值会有较大抖动;在分析载波频率、伪码速率和采样率之间关系的基础上,得出设计高精确度伪码扩频测距系统时三者之间的关系,用以确定不适合作为中频载波频率的频点,对伪码扩频测距系统的设计具有指导和借鉴意义。 The impact of digital receiver carrier frequency on the ranging precision is analyzed. It ispointed out that when the IF carrier frequency is an integer multiple of PN code rate, the ranging valuewill have a larger jitter. Based on the analysis of the relationship among the IF carrier frequency, PN coderate and sampling rate, the formula of designing high precision pseudo code ranging system from the threeparts is put forward, which can be used to determine whether a certain value is suitable for the frequencyof the IF carrier. The formula shows important guiding significance for the design of pseudo code rangingsystem.
作者 常青 李育龙 李东新
机构地区 北京航空航天大学电子信息工程学院
出处 《太赫兹科学与电子信息学报》 2014年第6期807-812,共6页 Journal of Terahertz Science and Electronic Information Technology
关键词 中频载波 伪码速率 采样率 测距精确度 IF carrier PN code rate sampling rate ranging precision
分类号 P228.4 [天文地球—大地测量学与测量工程]
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参考文献8

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二级参考文献16

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共引文献48

太赫兹科学与电子信息学报
2014年 第6期

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