Acoustic PPM image processing for underwater communications

Author

Biagi, Mauro

Author_Institution

Dept. of Inf., Electr. & Comm. Eng., Sapienza Univ. of Rome, Rome, Italy

fYear

2011

fDate

6-9 June 2011

Firstpage

1

Lastpage

6

Abstract

Pulse position modulated (PPM) acoustic pulses are difficult to detect since they carry information on delays so, assuring reliable information delivery mainly in shallow sea channels because of strong multipath and other interference sources/causes, large signal fluctuation and high noise level may be considered a timely challenge. This paper proposes a signal analysis based on the Wigner-Ville transform and subsequent image processing so to understand the main characteristics of multipath and interference and their adverse effects on detection of pulse position information. By basing on this approach performance of Maximal Ratio Combining (MRC) and Equal Gain Combining (EGC) have been taken into account.

Keywords

acoustic signal processing; diversity reception; image processing; interference (signal); pulse position modulation; transforms; underwater acoustic communication; Wigner-Ville transform; acoustic PPM image processing; equal gain combining; maximal ratio combining; pulse position modulated acoustic pulses; signal fluctuation; underwater communications; Channel estimation; Delay; Image edge detection; Interference; Receivers; Reliability; Time frequency analysis; PPM; Shallow water channel; Wigner-Ville; multipath;

fLanguage

English

Publisher

ieee

Conference_Titel

OCEANS, 2011 IEEE - Spain

Conference_Location

Santander

Print_ISBN

978-1-4577-0086-6

Type

conf

DOI

10.1109/Oceans-Spain.2011.6003407

Filename

6003407