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A Fast and Highly Accurate Carrier Acquisition for Deep Space Applications
Wang, Le; Wang, Zhugang; Xiong, Weiming; Wang, L (reprint author), Chinese Acad Sci, Dept Space Technol Res & Dev, Ctr Space Sci & Appl Res, Beijing, Peoples R China.
Department空间技术部
Source Publication2012 5TH INTERNATIONAL CONGRESS ON IMAGE AND SIGNAL PROCESSING (CISP)
2012
Pages1695-1698
Language英语
ISBN978-1-4673-0964-6
AbstractOn-board carrier acquisition in deep space telecommunications depends on the residual carrier, to overcome the detection difficulty of low-level received signal. Nowadays, it becomes reality for the receiver itself acquiring Doppler frequency offset. Frequency acquisition based on fast Fourier transform (FFT) has been applied extensively. In this paper, we introduce an algorithm of refined estimation after FFT frequency coarse estimation, which is theoretically analyzed to be maximum likelihood (ML) estimation. Its accuracy can achieve 10(-4) when the signal-to-noise ratio (SNR) is 5dB. By the aid of data, the estimator performs well at low SNR ranges. In the design of carrier acquisition, the accurate estimation of frequency offset aids the phase-locked loop (PLL) into locked state. If the acquisition bandwidth of PLL is fixed, accurate estimation value helps to decrease the FFT size. Due to simple implementation and good performance, the algorithm can be applied in burst communications.; On-board carrier acquisition in deep space telecommunications depends on the residual carrier, to overcome the detection difficulty of low-level received signal. Nowadays, it becomes reality for the receiver itself acquiring Doppler frequency offset. Frequency acquisition based on fast Fourier transform (FFT) has been applied extensively. In this paper, we introduce an algorithm of refined estimation after FFT frequency coarse estimation, which is theoretically analyzed to be maximum likelihood (ML) estimation. Its accuracy can achieve 10(-4) when the signal-to-noise ratio (SNR) is 5dB. By the aid of data, the estimator performs well at low SNR ranges. In the design of carrier acquisition, the accurate estimation of frequency offset aids the phase-locked loop (PLL) into locked state. If the acquisition bandwidth of PLL is fixed, accurate estimation value helps to decrease the FFT size. Due to simple implementation and good performance, the algorithm can be applied in burst communications.
KeywordFrequency Accurate Estimation Fft Phase Ml Estimation Estimation Bias Functional Invariance
Conference Name5th International Congress on Image and Signal Processing (CISP)
Conference DateOCT 16-18, 2012
Conference PlaceChongqing, PEOPLES R CHINA
Indexed ByEI ; CPCI
Document Type会议论文
Identifierhttp://ir.nssc.ac.cn/handle/122/2956
Collection空间技术部
Corresponding AuthorWang, L (reprint author), Chinese Acad Sci, Dept Space Technol Res & Dev, Ctr Space Sci & Appl Res, Beijing, Peoples R China.
Recommended Citation
GB/T 7714
Wang, Le,Wang, Zhugang,Xiong, Weiming,et al. A Fast and Highly Accurate Carrier Acquisition for Deep Space Applications[C]. NEW YORK:IEEE,2012:1695-1698.
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