NDLI: Stepped-frequency range profiling of multiple overlapped targets

Content Provider	IEEE Xplore Digital Library
Author	Zhu Yongfeng Zhao Hongzhong Fu Qiang Le Daobin
Copyright Year	2008
Description	Author affiliation: ATR Lab., Nat. Univ. of Defense Technol., Changsha (Zhu Yongfeng; Zhao Hongzhong; Fu Qiang; Le Daobin)
Abstract	It is a challenging task all along for modern radar systems to detect and recognize multiple targets in heavy clutter. Stepped-frequency radar (SFR) can acquire high range resolution profiles (HRRP) to improve the performance of target recognition greatly. Moreover, SFR can suppress clutter by increasing the pulse repetition frequency (PRF) as well as decreasing the product of the pulse width and the frequency step. However, as PRF increases, range measurement becomes ambiguous, so multiple targets in the same formation will probably overlap each other along the range axis. Accordingly, this paper puts emphasis on solving this overlap problem, namely, estimating HRRP of each overlapped target. It firstly analyzes the special characteristics of the SFR echoes received under the condition of range ambiguity. Then, considering envelop-weighting modification and non-modification to each HRR cell, it proposes two estimation methods, the first of which is based on maximum likelihood estimation (MLE) and reaches the Cramer-Rao low bound (CRLB). Monte Carlo simulation results have verified the validity of the theoretical analysis.
Starting Page	1
Ending Page	4
File Size	1700664
Page Count	4
File Format	PDF
ISBN	9781424415380
ISSN	10975659
DOI	10.1109/RADAR.2008.4720904
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-05-26
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Target recognition Clutter Space vector pulse width modulation Frequency Radar scattering Maximum likelihood estimation Radar detection Mathematical model Electromagnetic scattering Laser radar Range Ambiguity HRRP Multiple Targets
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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