The invention discloses an
underwater acoustic
signal communication and positioning integrated method. The existing method does not jointly consider the problem of
channel resource occupation caused by integration of communication and positioning. According to the method, mutually orthogonal
Chirp subcarriers are used as communication signals, meanwhile, long
Chirp signals are used as
pilot frequency, and the
pilot frequency and the communication signals are overlapped together to be sent at a sender, so that extra channel overhead caused by additional
pilot frequency is saved, and the
signal sending time interval is shortened. A
receiver uses a plurality of pilot signals to perform joint Doppler
estimation and compensation and
time of arrival estimation, and the result of the
time of arrival estimation is used for a
positioning system and a communication
system on the one hand. According to the
demodulation mode, correlation calculation is carried out by using different
Chirp subcarriers, and symbol
demodulation is carried out according to correlation values. According to the communication and positioning integrated waveform design method, the
signal sending time interval can be shortened, the
system complexity can be reduced, and good communication performance is achieved.