Frequency tracking of biological waveforms

This GUI implements sequential importance resampling (SIR) particle filters for tracking the frequency of echolocation signals used by micro-bats to determine where objects are in space. To learn how to use the GUI (ftracker) please watch the following video:
https://www.youtube.com/watch?v=M9Go3_bf9Po
The algorithm is described in this paper:
Nagappa S, Hopgood J. Frequency tracking of biological waveforms. In IMA International Conference on Mathematics in Signal Processing. 2006.

To fully understand how this algorithm is implemented in MATLAB, please see “code.m” which is heavily commented.

Bat files: Courtesy of Avisoft Bioacoustics, available: http://www.batcalls.com/
European Social Calls, "Distress Calls and Feeding Buzzes of European Bats"

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