Experimental validation of a fast acquisition algorithm for underwater acoustic communication signals under large Doppler conditions

Objectives The foundation for creating an underwater cyberspace is the acquisition of acoustic signals from moving underwater targets, and the implementation of acoustic navigation, positioning, communication, and active target detection begins with the acquisition of acoustic signals in relative motion under interference conditions. Methods Aiming at the problem of high cost and high risk in the acquisition test of moving target acoustic signal in water, a method of acoustic test in air was proposed. The acquisition performance of the time-frequency joint estimation algorithm based on double difference-FFT proposed in this ?