电讯技术Issue(4)：435-440,6.DOI:10.3969/j.issn.1001-893x.2015.04.015
星载统一测控载波跟踪环相位噪声分析
Phase Noise Analysis of Spaceborne Uniform TT & C Carrier Tracking PLL
陈翔 1陈瑞龙1
作者信息
- 1. 上海航天测控通信研究所，上海201109
- 折叠
摘要
Abstract
To guarantee speed and range measurement accuracy, one of the effective means is to apply the carrier tracking phase locked loop( PLL) with nested loop structure in the spaceborne uniform TT&C tran-sponders for acquiring coherent carrier. Because coherent local frequency is used to compensate Doppler shift,it is necessary to consider the effect of input phase noise on local oscillator phase noise. To predict loop output phase noise performance precisely,loop phase noise models of different noise components are built by means of analyzing signal flow graph and phase noise each component contributes. Output phase noise power spectrum density( PSD) with different input signal power is simulated and calculated. The ac-curacy of loop phase noise is verified by comparing the result of simulation with that of actual circuit. Using this model can improve loop design accuracy and efficiency.关键词
统一测控/载波跟踪环/嵌套环路/相位噪声模型Key words
uniform TT&C/carrier tracking PLL/nested loop/phase noise model分类
信息技术与安全科学引用本文复制引用
陈翔,陈瑞龙..星载统一测控载波跟踪环相位噪声分析[J].电讯技术,2015,(4):435-440,6.
