Impulse Propagation using WATTCH

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Authors
  1. Theriault, J.A.
  2. Pecknold, S.
Corporate Authors
Defence R&D Canada - Atlantic, Dartmouth NS (CAN)
Abstract
DRDC Atlantic has developed a coherent transmission-loss model that simulates the propagation of acoustic pulses through an ocean environment. Using a set of input eigenrays and an input waveform, the WATTCH (Waveform Transmission Through a Channel) model can simulate the signal received as a result of transmitting the waveform through the ocean environment. Multiple output time-series channels represent receivers at given ranges and depths. Assuming the required eigenrays can be generated, WATTCH can simulate the effects of complex range-dependant environments. This document presents the mathematical formulation and set of examples used to develop and verify the model. In addition, a comparison is made between two pulse propagation techniques. The first technique uses WATTCH to simulate the arrival of a transmitted waveform. The second technique uses WATTCH to simulate the arrival of a band-limited impulse waveform, and convolves the results with the desired transmitted waveform. The comparison shows the techniques yield equivalent results and therefore multiple waveforms may be simulated using the second technique, but only running the WATTCH model once.

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Keywords
Pulse Propagation;Communication;Propagation loss;Transmission loss;WATTCH (WAveform Transmission Through a CHannel)
Report Number
DRDC-ATLANTIC-ECR-2004-248 — External Client Report
Date of publication
01 Jan 2006
Number of Pages
32
DSTKIM No
CA027279
CANDIS No
525397
Format(s):
Electronic Document(PDF)

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