Dual transponder ranging performance in the presence of oscillator phase noise
来源期刊：中南大学学报(英文版)2015年第4期
论文作者：ZHAO Ming-chen WANG Chun-hui JIN Xiao-jun JIN Zhong-he
文章页码：1350 - 1357
Key words：inter-satellite; carrier ranging; oscillator phase noise; power spectral density; high precision
Abstract: A dual transponder carrier ranging method can be used to measure inter-satellite distance with high precision by combining the reference and the to-and-fro measurements. Based on the differential techniques, the oscillator phase noise, which is the main error source for microwave ranging systems, can be significantly attenuated. Further, since the range measurements are derived on the same satellite, the dual transponder ranging system does not need a time tagging system to synchronize the two satellites. In view of the lack of oscillator noise analysis on the dual transponder ranging model, a comprehensive analysis of oscillator noise effects on ranging accuracy is provided. First, the dual transponder ranging system is described with emphasis on the detailed analysis of oscillator noise on measurement precision. Then, a high-fidelity numerical simulation approach based on the power spectrum density of an actual ultra-stable oscillator is carried out in both frequency domain and time domain to support the presented theoretical analysis. The simulation results under different conditions are consistent with the proposed concepts, which makes the results reliable. Besides, the results demonstrate that a high level of accuracy can be achieved by using this oscillator noise cancelation-oriented ranging method.
ZHAO Ming-chen(赵明臣)1, WANG Chun-hui(王春晖)2, JIN Xiao-jun(金小军)2, JIN Zhong-he(金仲和)2
(1. Department of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China;
2. Micro-Satellite Research Center, Zhejiang University, Hangzhou 310027, China)
Abstract:A dual transponder carrier ranging method can be used to measure inter-satellite distance with high precision by combining the reference and the to-and-fro measurements. Based on the differential techniques, the oscillator phase noise, which is the main error source for microwave ranging systems, can be significantly attenuated. Further, since the range measurements are derived on the same satellite, the dual transponder ranging system does not need a time tagging system to synchronize the two satellites. In view of the lack of oscillator noise analysis on the dual transponder ranging model, a comprehensive analysis of oscillator noise effects on ranging accuracy is provided. First, the dual transponder ranging system is described with emphasis on the detailed analysis of oscillator noise on measurement precision. Then, a high-fidelity numerical simulation approach based on the power spectrum density of an actual ultra-stable oscillator is carried out in both frequency domain and time domain to support the presented theoretical analysis. The simulation results under different conditions are consistent with the proposed concepts, which makes the results reliable. Besides, the results demonstrate that a high level of accuracy can be achieved by using this oscillator noise cancelation-oriented ranging method.
Key words:inter-satellite; carrier ranging; oscillator phase noise; power spectral density; high precision
