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Continuous transmission FM sonar with one octave bandwidth and no blind time

  • P. T. Gough
  • A. de Roos
  • M. J. Cusdin

Abstract

Despite the advantage of high average power output, traditional continuous transmission FM (CTFM) sonars suffer from two major defects: separate transmit and receive transducers are required, and the demodulated signal is unavailable for a proportion of the sweep period. The paper shows how, by using a dual-demodulation system, the demodulated signal can be made continuous, resulting in the complete elimination of the blind time and in a range resolution as good as two wavelengths of the mean frequency. Experimental results using a CTFM air sonar justify both these claims.

Keywords

Spectrum Analyser Local Oscillator Range Cell Range Resolution Target Strength 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© AT&T 1990

Authors and Affiliations

  • P. T. Gough
  • A. de Roos
  • M. J. Cusdin

There are no affiliations available

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