ECHOLOCATION WITH WIDE-BAND WAVEFORMS: BAT SONAR SIGNALS
Abstract
The wide-band, echolocating sonar signals of bats are investigated with reference to statistical estimation theory to ascertain the implications of this class of signals. The work is divided into four major sections: (1) The concept of an ideal receiver for the simultaneous measurement of range and velocity of a target is extended to cover wide-band signals; (2) angular localization of a target by means of a fixed, gain-dispersive antenna in the presence of additive Gaussian noise is studied; (3) an ambiguity diagram computer is designed and built which calculates the signal function, defined in Chapter 2, of an arbitrary waveform; and (4) ambiguity diagrams are calculated for several types of bat sonar signals emitted by the bat Myotis lucifugus and one cruising signal emitted by the bat Lasiurus borealis.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 06, 1964
- Accession Number
- AD0605322
Entities
People
- D. A. Cahlander
Organizations
- Massachusetts Institute of Technology