NDLI: Mismatched filters for Doppler-sensitive active sonar pulses

Content Provider	IEEE Xplore Digital Library
Author	Pallaud, R.F. Atkins, P.R.
Copyright Year	2011
Description	Author affiliation: Technical Trainers College (TTC), German International Cooperation (GIZ) Ltd. Riyadh, 11451, Saudi Arabia (Pallaud, R.F.) \|\| The University of Birmingham Edgbaston, Birmingham, B15 2TT, United Kingdom (Atkins, P.R.)
Abstract	A technique used for designing radar poly-phase codes, is used to design mismatched filters for long-range active sonar systems, where transmit waveforms are Doppler-sensitive. The long ranges and operational scenarios involved mean that only single-ping operations are considered. The waveforms under consideration are long-duration Cox combs and sinusoidally frequency modulated (SFM) pulses, arbitrarily selected to occupy the frequency range 1 to 2 kHz. When used in conjunction with a matched filter, these waveforms offer an attractive Doppler resolution, but suffer from significant range sidelobes. The proposed mismatched filters attempt to improve their range resolution or lower their sidelobes across the zero-Doppler region of the range-Doppler domain. The designed cross-ambiguity functions achieve range sidelobes lower than −32.5 dB for the Cox comb, and −33.0 dB for the SFM pulse, as well as acceptable Doppler sidelobes at non-zero delays. This comes at a price of a signal-to-noise ratio (SNR) loss of 18.5 dB for the Cox comb, and 20.5 dB for the SFM pulse.
Starting Page	150
Ending Page	155
File Size	1455404
Page Count	6
File Format	PDF
ISBN	9781457702433
e-ISBN	9781457702426
DOI	10.1109/ICSIPA.2011.6144141
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-11-16
Publisher Place	Malaysia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Matched filters Frequency modulation Correlation Doppler effect Reverberation Wideband Signal to noise ratio
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
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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