CHIRP Signal Processing
Micron Echosounder
0650-SOM-00001, Issue: 02
20
© Tritech International Ltd.
T1
T2
Combined echo
Target 2 echo
Target 1 echo
Transmitted Pulse
Sonar range
resolution
Target
seperation
Time
Target
Seperation
Both targets
are visible.
The response from the pattern-matching algorithms in the sonar means that the length of
the acoustic pulse no longer affects the amplitude of the echo on the sonar display. Longer
transmissions (and operating ranges) can be achieved without a loss in range resolution.
CHIRP gives additional improvements in background noise rejection, as the sonar is only
looking for a swept frequency echo and can remove random noise or out-of-band noise.
