An adaptive weak signal extraction algorithm based on four-element infrared detecting system

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	An adaptive weak signal extraction algorithm based on four-element infrared detecting system
	Wang ED(王恩德); Zhu F(朱枫); Xiao YH(肖阳辉); Tong XX(佟新鑫); Zhu D(朱丹)
	2011
会议名称	International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications
会议日期	May 24-26, 2011
会议地点	Beijing, China
页码	8 pp.
中文摘要	The four-element infrared detecting system is a common used detecting system to detect a target from sky background. However, one of the main application limits of this system is the short detecting distance. Consequently, this paper presents an adaptive weak signal extraction algorithm, with which the weak distant target signal can be extracted, thus the detecting distance can be obviously lengthened. The algorithm is designed as follows: Firstly, estimates the target signal when the signal is extremely weak. To a given detecting system, the target signal can be estimated by the geometry relationship among the physical references. Secondly, gets the initial normalized coefficients h(i) of the BPFIR filter by sampling the first harmonic of the estimated target signal and then normalized coefficients Sigma0Nh(i) = 1 Thirdly, gets the amplification value k of the algorithm using the radiation equation L = radic(Irho/EnKc) and the response property curve of the sensors. Finally, updates the coefficients of the BPFIR filter H(i) using the output y(i) of the detecting system and changes the amplification value k using PID method, The newer output of the BPFIR filter will be used to obtain newer updated coefficients of the BPFIR filter, and hence the adaptive weak signal extraction algorithm is realized. With the application of this algorithm on a four-element detecting system, the distant weak target signal can be extracted properly. Experiments shows that the detecting distance is lengthened more than 20 percents.
收录类别	EI ; CPCI（ISTP）
产权排序	1
会议录	Proceedings of the SPIE - The International Society for Optical Engineering
会议录出版者	SPIE - The International Society for Optical Engineering
会议录出版地	USA
语种	英语
WOS记录号	WOS:000295078500026
内容类型	会议论文
源URL	[http://ir.sia.cn/handle/173321/7956]
专题	沈阳自动化研究所_光电信息技术研究室
推荐引用方式 GB/T 7714	Wang ED,Zhu F,Xiao YH,et al. An adaptive weak signal extraction algorithm based on four-element infrared detecting system[C]. 见:International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications. Beijing, China. May 24-26, 2011.