| 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 Publication | 2012 5TH INTERNATIONAL CONGRESS ON IMAGE AND SIGNAL PROCESSING (CISP) |
| 2012 | |
| Pages | 1695-1698 |
| Language | 英语 |
| ISBN | 978-1-4673-0964-6 |
| Abstract | 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.; 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. |
| Keyword | Frequency Accurate Estimation Fft Phase Ml Estimation Estimation Bias Functional Invariance |
| Conference Name | 5th International Congress on Image and Signal Processing (CISP) |
| Conference Date | OCT 16-18, 2012 |
| Conference Place | Chongqing, PEOPLES R CHINA |
| Indexed By | EI ; CPCI |
| Document Type | 会议论文 |
| Identifier | http://ir.nssc.ac.cn/handle/122/2956 |
| Collection | 空间技术部 |
| Corresponding Author | Wang, 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. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| 20121695-1698.pdf（674KB） | 开放获取 | CC BY-NC-SA | Application Full Text | |||
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