Pulse compression
![If the targets are separated enough...](/Images/godic/202502/05/Two_targets_before5112.jpg")
![...echoes can be distinguished.](/Images/godic/202502/05/Two_targets_resoluted5113.jpg")
![If the targets are too close...](/Images/godic/202502/05/Two_targets_below_resolution_before5113.jpg")
![...the echoes are mixed together.](/Images/godic/202502/05/Two_targets_below_resolution5113.jpg")
Pulse compression is a signal processing technique commonly used by radar, sonar and echography to increase the range resolution as well as the signal to noise ratio. This is achieved by modulating the transmitted pulse and then correlating the received signal with the transmitted pulse.