Flutter and Its Effect Upon Replica Correlation Sonar. Technical Report Under Contract N00039-88-C-0043, TD No. 03A007, Special Acoustic Signals, and TD No. 03A011, Special Acoustic Signals - Phase 2
Abstract
The effect of flutter, i.e., of rapidly fluctuating phase variations, is studied in detail, insofar as it affects the performance of a high resolution active sonar that uses replica correlation to achieve pulse compression. Flutter is defined in terms of a time varying, random displacement of the time variable, at the point of reception. Several causes of flutter are investigated, including target motions, turbulence in the propagating medium, and motions of the sonar platform at the times of pulse transmission and echo reception. Results are extracted from the literature regarding effects of the medium. Detailed theoretical analyses are presented for the cases where the transmitted pulse is a linear-FM waveform or a stepped-FM hopcode signal. Results of computer simulations are also presented. It is demonstrated that there is a law of diminishing returns in regards to increases in time-bandwidth product Sonar, Pulse compression, Spread Doppler, Frequency hopped, Flutter, Matched filter, Linear FM, Time-bandwidth product, Phase fluctuations, Replica correlation, Hopcode
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 05, 1990
- Accession Number
- ADA266372
Entities
People
- Terry L. Henderson
Organizations
- University of Texas at Austin