Aiming at the particularity of the underwater environment and acoustic positioning system requirements

to reduce the complexity of the underwater acoustic positioning signal detection and hardware resource consumption

to accurately detect positioning signal

to provide real-time

rapid time delay information

for the goal base station

according to the character of acoustic positioning signal

using code element matching demodulation and coded signal correlate method of location signal to ensure arrival time.And by using VHDL language design acoustic positioning signal detection circuit on FPGA platform.The experimental result indicates that the examination method has characteristics of rapid

accurate

good real-time

it can meet the application requirements of underwater positioning system.