Joint Doppler frequency and frequency-rate estimation in LEO satellite communications

2003 ◽  
Author(s):  
F.D. Nunes ◽  
J.M.N. Leitao
Keyword(s):  
Doppler Frequency ◽  
Satellite Communications ◽  
Rate Estimation ◽  
Frequency Rate ◽  
Leo Satellite

A FrFT Based Algorithm for Doppler Frequency Rate Estimation from LFM Coherent Pulse Train

2010 ◽  
Vol 32 (11) ◽  
pp. 2718-2723 ◽  
Author(s):  
Hong Li ◽  
Yu-liang Qin ◽  
Yan-peng Li ◽  
Hong-qiang Wang ◽  
Xiang Li
Keyword(s):  
Pulse Train ◽  
Doppler Frequency ◽  
Rate Estimation ◽  
Frequency Rate ◽  
Coherent Pulse

Hardware Implementation of Doppler Shift Estimation and Compensation in LEO Satellite Communication

2013 ◽  
Vol 791-793 ◽  
pp. 2076-2080
Author(s):  
Kang Wu ◽  
Yi Jun Chen ◽  
Zhuang Ping Qi ◽  
Hui Jie Liu ◽  
Xu Wen Liang
Keyword(s):  
Frequency Shift ◽  
Doppler Shift ◽  
Communication Systems ◽  
Relative Velocity ◽  
Satellite Communication ◽  
Doppler Frequency ◽  
Doppler Frequency Shift ◽  
Frequency Rate ◽  
Leo Satellite ◽  
Doppler Compensation

In the low earth orbit (LEO) satellite communication systems, in which receiver and transmitter are not fixed and have significant relative velocity, the fast time-varying Doppler frequency shift is high, which degrades the performance of acquisition and tracking. Doppler frequency shift and Doppler frequency rate can be calculated by the terrestrial system based on the satellite orbit and the relative velocity. In this paper, we introduce the Doppler compensation principle and the realization of Doppler shift estimation and compensation on an universal wireless signal processing platform. The experimental results showed that the Doppler compensation model have high accuracy, which is positively correlated with the Doppler frequency rate.

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