A Fast and Highly Accurate Carrier Acquisition for Deep Space Applications

	A Fast and Highly Accurate Carrier Acquisition for Deep Space Applications
	Wang, Le; Wang, Zhugang; Xiong, Weiming
	2012
会议名称	5th International Congress on Image and Signal Processing (CISP)
会议日期	OCT 16-18, 2012
会议地点	Chongqing, PEOPLES R CHINA
关键词	Frequency accurate estimation FFT Phase ML estimation estimation bias Functional invariance
页码	1695-1698
通讯作者	Wang, L (reprint author), Chinese Acad Sci, Dept Space Technol Res & Dev, Ctr Space Sci & Appl Res, Beijing, Peoples R China.
中文摘要	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.
英文摘要	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.
收录类别	EI ; CPCI
会议主办者	IEEE, EMB
会议录	2012 5TH INTERNATIONAL CONGRESS ON IMAGE AND SIGNAL PROCESSING (CISP)
会议录出版者	IEEE
会议录出版地	NEW YORK
学科主题	空间技术
语种	英语
ISBN号	978-1-4673-0964-6
内容类型	会议论文
源URL	[http://ir.nssc.ac.cn/handle/122/2956]
专题	国家空间科学中心_空间技术部
推荐引用方式 GB/T 7714	Wang, Le,Wang, Zhugang,Xiong, Weiming. A Fast and Highly Accurate Carrier Acquisition for Deep Space Applications[C]. 见:5th International Congress on Image and Signal Processing (CISP). Chongqing, PEOPLES R CHINA. OCT 16-18, 2012.