Code set design for digital polarity correlators in a multiple user sonar ranging system

摘要

In pulsed ultrasonic distance measurement systems, the pulse compression techniques were adopted to eliminate frequent misreadings caused by crosstalk or external ultrasound sources. In this paper, we present digital polarity correlators designed for the binary coded frequency shift keyed signals. For the multiple user code set design, we propose the use of a combination of genetic algorithm and hill climbing.