NDLI: Phase coding for the resolution of range ambiguities in Doppler weather radar

Content Provider	IEEE Xplore Digital Library
Author	Sachidananda, M. Zrnic, D.S.
Copyright Year	1998
Description	Author affiliation: CIMMS, Oklahoma Univ., Norman, OK, USA (Sachidananda, M.)
Abstract	This paper deals with the recovery of Doppler velocities in the presence of overlaid echoes in range. Transmitted pulses are phase shifted to tag the echoes from scatterers separated by the unambiguous range. A new systematic phase code and an algorithm for estimating the mean velocities of 1st and 2nd trip signals when they are overlaid are presented. The return samples are phase corrected to cohere the 1st or the 2nd trip signal, leaving the other signal power spread in a deterministic manner across the spectrum. A new algorithm has been developed which enables one to recover the velocity of the weaker signal even when the overlaid power ratio is as large as 40 dB, for spectrum widths 4 m s/sup -1/ or less and an unambiguous velocity of 32 m s/sup -1/. Tests on simulated weather signals indicate that the method can be employed in a Doppler radar to effectively double the unambiguous range without the sacrifice of the unambiguous velocity interval.
Starting Page	265
Ending Page	268
File Size	446624
Page Count	4
File Format	PDF
ISBN	0818683163
ISSN	10586393
DOI	10.1109/ACSSC.1997.680186
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-11-02
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Meteorological radar Storms Radar scattering Light scattering Pulse measurements Doppler radar Meteorology Dynamic range Frequency domain analysis Laboratories
Content Type	Text
Resource Type	Article
Subject	Signal Processing Computer Networks and Communications

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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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