EVALUATION OF THE PROBABILISTIC DATA ASSOCIATION FILTER IN A REALISTIC SONAR ENVIRONMENT

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Authors
  1. Roger, W.A.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
The problem of tracking an underwater narrowband signal that has experienced the many vagaries of open ocean transmission is of considerable interest. Usually the simpler signal followers developed for radar applications fail when attempting to handle the unique underwater environment encountered by a passive line array receiver. This paper investigates a particular recursive algorithm called the Probabilistic Data Association filter to determine if it can provide robust passive tracking of low signal-to-noise signals in a background of clutter caused by other sources and noise. It will be shown that two modifications to the basic algorithm substantially improve its tracking performance and its ability to estimate the target signal's trajectory. In addition, an effective technique for detecting when the filter is no longer following the signal will be presented. This loss-of-lock detector works for very low-level target signals.
Report Number
DREA-TM-94-201 — Technical Memorandum
Date of publication
01 Jan 1994
Number of Pages
22
DSTKIM No
94-01384
CANDIS No
139028
Format(s):
Hardcopy;Originator's fiche received by DSIS;Document Image stored on Optical Disk

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