The AWSUM filter: a 20-dB gain fluctuation-based processor

Author

Wagstaff, Ronald A.

Author_Institution

Naval Res. Lab., Stennis Space Center, MS, USA

Volume

22

Issue

1

fYear

1997

fDate

1/1/1997 12:00:00 AM

Firstpage

110

Lastpage

118

Abstract

The advanced WISPR summation (AWSUM) filter, a natural extension of the WISPR filter for higher filter order numbers, is presented and its performance is compared to the performance of the WISPR filter and the conventional summation processor. It is shown that the AWSUM filter achieves substantial gains in various measures of processor performance above those of the other two processors in spatial and spectral resolution, minimum detectable level (MDL), clutter reduction, and signal-to-noise ratio (SNR) gain. The important processing parameters are shown to be the percentage of overlap of the voltage time series and the number of FFT´s averaged. SNR gains in excess of 20 dB were shown to be achievable for low-fluctuation amplitude tonals using measured data

Keywords

acoustic filters; acoustic signal detection; array signal processing; clutter; fast Fourier transforms; scintillation counters; sonar arrays; sonar signal processing; 20 dB; AWSUM filter; FFT; SNR gains; WISPR summation filter; clutter reduction; filter order numbers; fluctuation-based processor; low-fluctuation amplitude tonals; minimum detectable level; processing parameters; processor performance; signal-to-noise ratio; spatial resolution; spectral resolution; voltage time series; Acoustic propagation; Acoustic signal detection; Filters; Fluctuations; Ocean temperature; Performance gain; Sea measurements; Sea surface; Signal processing algorithms; Underwater acoustics;

fLanguage

English

Journal_Title

Oceanic Engineering, IEEE Journal of

Publisher

ieee

ISSN

0364-9059

Type

jour

DOI

10.1109/48.557545

Filename

557545