Frequency Offset Estimation for 5G Based LEO Satellite Communication Systems

被引：0
作者：
Tian, Ding [1 ,2 ]
Zhao, Yue [1 ,2 ]
Tong, Jianfei [1 ,2 ]
Cui, Gaofeng [1 ,2 ]
Wang, Weidong [1 ,2 ]
机构：
[1] Minist Educ, Key Lab Universal Wireless Commun, Beijing, Peoples R China
[2] Beijing Univ Posts & Telecommun, Informat & Elect Technol Lab, Sch Elect Engn, Beijing, Peoples R China
来源：
2019 IEEE/CIC INTERNATIONAL CONFERENCE ON COMMUNICATIONS IN CHINA (ICCC) | 2019年
基金：
中国国家自然科学基金;
关键词：
Doppler rate; Doppler shift; OFDM; LEO; 5G; Kalman filter; JOINT ESTIMATION;
D O I：
10.1109/iccchina.2019.8855824
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The signal demodulation is significantly affected by the time-varying frequency offset in low earth orbit (LEO) satellite communication system. We present a method for Doppler shift and Doppler rate estimation based on 5G frame structure in satellite communication system. The integer and fractional part of the Doppler shift is estimated within a prime synchronizing signal (PSS) in two steps. Large estimation range and low complexity can he achieved in this method. Besides, a Doppler rate estimation algorithm is proposed. Precise Doppler rate is calculated by extracting the accumulated phase difference of two consecutive PSS. Furthermore, Kalman filter is utilized to improve the stability of the frequency offset estimators in low signal-to-noise ratio (SNR). Simulation results show that the estimators can perform well with large estimation range and high accuracy.
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页数：6
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