A burst-type underwater acoustic communication method

Abstract

The invention provides a burst type underwater acoustic communication method. Divide the binary information to be transmitted, calculate the minimum quantization interval of the frequency difference according to the optimal transmission frequency range of the transmitting transducer, and use the divided binary information to calculate the distance between the reference low-frequency band signal and the time delay and frequency difference load signal Frequency difference and time difference, the delay difference and frequency difference are modulated between the reference low frequency band signal and the time delay and frequency difference load signal, and the burst underwater acoustic communication modulation based on time-frequency combination is completed. After the synchronization of the receiving end is completed, the local reference signal of the reference low-frequency band signal is used to re-synchronize each chip, and the signal interception is completed, and the time delay difference and frequency difference carried in each intercepted chip are estimated, and Based on the minimum quantization interval during modulation, the difference is demodulated to obtain modulation information. The invention is simple and easy to implement, has high reliability, and can resist underwater multi-channel and interference according to the special structure of the frame signal.

Description

technical field [0001] The invention relates to an underwater acoustic communication method, in particular to a burst type underwater acoustic communication method. Background technique [0002] In the past two decades, with the development and progress of various fields such as computer technology, the development of underwater acoustic communication technology has also received technical support, and research methods and hardware equipment have been fundamentally improved. Therefore, underwater acoustic communication technology developed rapidly. [0003] Affected by the characteristics of underwater multi-path, environmental noise, boundary loss, and spreading loss, the demand for robust and reliable underwater acoustic communication algorithms in the field of marine scientific research has gradually emerged. Among the many existing underwater acoustic communication methods, the spread spectrum communication series algorithm has strong robustness, but its communication r...

AI Technical Summary

Problems solved by technology

However, there is currently no communication algorithm that simultaneously carries delay difference information and frequency difference information in one chip.

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