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Trading detection for resolution in active sonar receivers.

Nabin S Sharma1, John R Buck, James A Simmons

  • 1Department of Electrical and Computer Engineering, University of Massachusetts Dartmouth, North Dartmouth, Massachusetts 02747, USA.

The Journal of the Acoustical Society of America
|September 8, 2011
PubMed
Summary
This summary is machine-generated.

This study introduces a novel active sonar receiver, the variable resolution and detection receiver (VRDR), which balances signal detection and target resolution. The VRDR outperforms traditional matched and inverse filters in simulations for sonar target detection.

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Area of Science:

  • Acoustics
  • Signal Processing
  • Sonar Technology

Background:

  • Matched filters optimize signal detection in noise but struggle with resolving closely spaced targets.
  • Inverse filters offer high resolution but are impractical due to noise amplification in realistic scenarios.
  • Existing bandlimited inverse filters present limitations in balancing detection and resolution.

Purpose of the Study:

  • To propose a novel active sonar receiver, the variable resolution and detection receiver (VRDR).
  • To achieve a smooth trade-off between detection and resolution capabilities in sonar systems.
  • To enhance performance compared to existing sonar receiver filter techniques.

Main Methods:

  • Development of the variable resolution and detection receiver (VRDR) concept.
  • Integration of matched filter and inverse filter properties within the VRDR.
  • Simulation of receiver operating characteristics for various sonar targets.

Main Results:

  • The VRDR demonstrates a superior ability to balance detection and resolution.
  • Simulated performance of the VRDR surpasses matched filters, inverse filters, and bandlimited inverse filters.
  • The VRDR provides a practical solution for scenarios requiring both high detection rates and precise target resolution.

Conclusions:

  • The proposed VRDR offers a significant advancement in active sonar receiver design.
  • The VRDR effectively mitigates the limitations of traditional matched and inverse filters.
  • This receiver technology is crucial for improving sonar system performance in complex environments.