NDLI: High-resolution range estimation using time delays in ultra-wideband M-sequence radar

Content Provider	IET Digital Library
Author	Fereidoony, Foad Mirtaheri, Seyed Abdullah Chamaani, Somayyeh
Abstract	Getting a high range resolution is an important issue in many research areas and applications especially for narrowband system. Although wideband systems have a better condition from this viewpoint, they have additional challenges in terms of cost and RF manufacturing. Thus, overcoming the bandwidth constraint on the resolution can be a game changer in the simplicity and feasibility aspects of a system. In this paper, an accurate and efficient approach for high resolution range measurement is proposed. An ultra-wideband (UWB) M-sequence system is established for its simplicity and cost effectiveness compared to other methods like frequency modulated continuous wave (FMCW) and impulse technique. However, the limited usable bandwidth in the power spectrum of an M-sequence signal degrades its resolution. We have alleviated this shortcoming by applying a Least squares (LS) estimator to improve the resolution and accuracy of the system. The acceptable performance of the presented method is verified experimentally and numerically by achieving 45% improvement in the resolution with the accuracy of more than 95%. By considering the effects of different parameters such as response of antenna, method of scan and systematic errors, the proposed method would be a good candidate for remote sensing applications.
Starting Page	1332
Ending Page	1339
Page Count	8
ISSN	17518725
Volume Number	11
e-ISSN	17518733
Issue Number	Issue 10, Aug (2017)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-map/11/10
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-map.2016.0646
Journal	IET Microwaves, Antennas & Propagation
Publisher Date	2017-04-21
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	FMCW Frequency Modulated Continuous Wave High-resolution Range Estimation Least-squares Estimator Radar Equipment Radar Resolution Remote Sensing Application Signal Processing And Detection System And Application Time Delay Ultra Wideband Radar Ultra-wideband M-sequence Radar
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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