Active Sonar transmission strategies in the presence of strong direct blast

Author

Luzhou Xu ; Jian Li ; Jain, Akshay

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of Florida, Gainesville, FL, USA

fYear

2014

Firstpage

1204

Lastpage

1208

Abstract

With the help of in-water experimentation data, we study: (1) the merits and limitations of two major classes of Active Sonar Systems, namely, Pulse Active Sonar (PAS) and Continuous Active Sonar (CAS), with the Doppler-Tolerant Linear Frequency Modulation (LFM) waveform; and (2) the merits and limitations of Doppler-Tolerant LFM and the Doppler-Sensitive SHAPE waveforms with CAS. Throughout the study, Matched Filter (MF) is used as the receiver design. The strong delay and Doppler spread direct blast and poor MF performance in noisy environments warrant us to introduce processing techniques which enable receivers to produce accurate range estimates.

Keywords

Doppler shift; frequency modulation; matched filters; sonar signal processing; Doppler spread direct blast; Doppler-sensitive SHAPE waveforms; Doppler-tolerant LFM waveform; Doppler-tolerant linear frequency modulation waveform; PAS; active sonar systems; continuous active sonar; matched filter; pulse active sonar; range estimates; Delays; Doppler effect; Noise; Receivers; Shape; Sonar; Transmitters; Continuous Active Sonar (CAS); Doppler-Sensitive waveform; Doppler-Tolerant Waveform; GLRT (Generalized Likelihood Ratio Test); Pulse Active Sonar (PAS); Range-Doppler Imaging;

fLanguage

English

Publisher

ieee

Conference_Titel

Signals, Systems and Computers, 2014 48th Asilomar Conference on

Print_ISBN

978-1-4799-8295-0

Type

conf

DOI

10.1109/ACSSC.2014.7094649

Filename

7094649