一种基于高效FrFT的LFM信号检测与参数估计快速算法

doi:10.11999/JEIT170467

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Abstract A fast algorithm based on the effective FrFT is proposed to realize the detection and parameter estimation of Linear Frequency Modulation (LFM) signal, since the traditional algorithms have a great computational burden. The effective FrFT is first analyzed, and pointed out to have problems in choosing the rotation angles, being easily affected by initial frequency, and poor anti-noise performance. Faced with the above problems, a modified power spectrum smooth filtering method is used to improve the effective FrFT algorithm. The theoretical analysis indicates that the proposed method based on effective FrFT can realize the detection and parameter estimation of LFM signal in low SNR condition with only three rotation angles. Furthermore, the computational cost is greatly reduced under the guarantee of the same parameter estimation accuracy compared to traditional FrFT. The simulation results verify the effectiveness of the proposed algorithm.

Key words： Effective FrFT Linear Frequency Modulation (LFM) signal Modified power spectrum smooth filtering

Received: 16 May 2017 Published: 01 November 2017

PACS:

TN957.51

Fund:The National Natural Science Foundation of China (61601343, 61671361, 61301285), China Postdoctoral Science Foundation Funded Project (2016M600768)

Corresponding Authors: TANG Shiyang E-mail: sytang@xidian.edu.cn

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	HUANG Xiang
	TANG Shiyang
	ZHANG Linrang
	GU Yabin

Cite this article:

HUANG Xiang,TANG Shiyang,ZHANG Linrang等. A Fast Algorithm of LFM Signal Detection and Parameter Estimation Based on Efficient FrFT[J]. JEIT, 2017, 39(12): 2905-2911.

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http://jeit.ie.ac.cn/EN/10.11999/JEIT170467 OR http://jeit.ie.ac.cn/EN/Y2017/V39/I12/2905

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