A Carrier Acquisition and Tracking Algorithm for High-Dynamic Weak Signal
This paper studies acquisition and tracking of carriers by the Tracking,Telemetry and Command (TT&C) systems in low Signal-to-Noise Ratio (SNR)and high dynamic conditions for deep space applications.An associated carrier acquisition and tracking algorithm is proposed and it features FFT frequency-domain shift and accumulation algorithm in combination with variable bandwidth FLL-PLL algorithm with Doppler rate pre-compensation.The algorithm not only captures signal with high dynamics and low SNR but also achieves high tracking accuracy.Simulation results show that the proposed associated frequency esti-mation algorithm is capable of carrier frequency estimation with an error less than 0.5 Hz and it tolerates high Doppler dynamics under Eb/no as low as 3 dB.
Deep space exploration High dynamics Frequency-domain shifting Variable bandwidth Doppler rate pre-compensation
Ruifeng Duan Rongke Liu You Zhou Qingping Song Zhiqiang Li
School of Electronic Information Engineering,Beihang University,Beijing 100191,China Beijing Institute of Astronautical Systems Engineering,Beijing 100076,China
国际会议
The First International Conference of National Soft Power (第一届国际软实力学术研讨会)
济南
英文
211-219
2011-10-22（万方平台首次上网日期，不代表论文的发表时间）