NDLI: Waveform design of geometric comb to extract target phase feature

Content Provider	IEEE Xplore Digital Library
Author	Yongqing Wu Hongjian Song Shefeng Yan
Copyright Year	2015
Description	Author affiliation: Inst. of Acoust., Beijing, China (Yongqing Wu; Hongjian Song; Shefeng Yan)
Abstract	The majority of active sonar systems to detect and classify a target based on the amplitude of the received echo strength or the induced Doppler shift. However, additional classification information is available from the phase shift introduced by some targets as a result of the acoustic boundary conditions. In this paper, waveform design of geometric comb using sub-band correlators is presented for measuring the phase shifts associated with certain stationary and moving targets when insonified by broadband transmissions. With the aim of providing improved range resolution, it maintains the amplitude of the transmission constant to maximize energy efficiency and compatibility with existing nonlinear power amplifiers. And the influences on target echo phase measurement are analyzed from reverberation gain achievable with broadband, Doppler sensitive geometric comb transmissions in littoral waters. At last, field trial results are given for a mine-like classification sonar system and a forward-looking sonar system designed for operation near the sea surface.
Starting Page	383
Ending Page	387
File Size	269807
Page Count	5
File Format	PDF
e-ISBN	9781479919482
DOI	10.1109/ChinaSIP.2015.7230429
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-07-12
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Decision support systems Feature extracted Waveform design Phase feature Indexes Active Sonar
Content Type	Text
Resource Type	Article

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