Split-spectrum processing: analysis of polarity threshold algorithm for improvement of signal-to-noise ratio and detectability in ultrasonic signals

Author

Shankar, P. Mohana ; Karpur, Prasanna ; Newhouse, Vernon L. ; Rose, Joseph L.

Author_Institution

Dept. of Mech. Eng. & Mech., Dresel Univ., Philadelphia, PA, USA

Volume

36

Issue

1

fYear

1989

Firstpage

101

Lastpage

108

Abstract

A polarity thresholding algorithm that has recently been developed for split-spectrum processing for ultrasonic coherent noise reduction is theoretically analyzed to evaluate its performance. The probability density function (PDF) of the output of the algorithm is derived and used to calculate the theoretical signal-to-noise ratio (SNR) enhancement and the receiver operating characteristics. The performance limits of the algorithm are also established. Some experimental results of SNR enhancement obtained with the polarity thresholding algorithm are presented.<>

Keywords

acoustic signal processing; acoustic signal processing; polarity threshold algorithm; receiver operating characteristics; ultrasonic signals; Algorithm design and analysis; Band pass filters; Filtration; Frequency diversity; Interference; Mechanical engineering; Performance analysis; Signal analysis; Signal detection; Signal processing;

fLanguage

English

Journal_Title

Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on

Publisher

ieee

ISSN

0885-3010

Type

jour

DOI

10.1109/58.16976

Filename

16976