Communication method for encoding and decoding by using whale/dolphin sound pulse number difference

Abstract

The invention discloses a communication method for encoding and decoding by using whale / dolphin click sound quantity difference, which comprises the following steps of: decoding communication information according to a preset condition satisfied by time delay difference between click sound pulses; a launching platform for coding m groups of click sound pulse strings representing N-bit informationand click sound pulse time delay differences tau d, identifying the time interval set by the communication code element time interval setter, setting the time interval between the adjacent click soundpulse strings, and converting the coded communication information into a sound wave signal through the underwater acoustic transducer to be sent; a receiving platform; carrying out normalized short-time energy spectrum calculation on the received sound wave signal, detecting and positioning the position and the duration of each click sound pulse in the received signal; the click sound pulse string recognizer for recognizing click sound pulse strings according to the principle of time intervals between adjacent click sound pulse strings set in communication codes, identifying and extracting each click sound pulse string, sending the click sound pulse string to a communication decoder, demodulating the number of click sound pulse strings contained in each click sound pulse string and the time delay difference between click sound pulses, and decoding communication information.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a communication method for encoding and decoding by using the difference in the number of whale / dolphin call pulses. Background technique [0002] As the most effective underwater communication method, underwater acoustic communication technology has become the most important communication method for communication and information sharing between underwater combat platforms by virtue of its advantages such as long communication distance and relatively mature technology, and has received great attention and development. , especially the concealment of underwater acoustic communication has been playing a pivotal role in underwater national defense and military communication. Improving the concealment of underwater acoustic communication can ensure that communication signals are not detected and intercepted by the enemy, so that underwater information can be transmitted safely,...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a communication method for encoding and decoding by using the difference in the number of whale / dolphin call pulses. The invention is based on the diversity of whale / dolphin click call pulses, and solves the problem of the obvious characteristics of artificial communication signals in the traditional underwater acoustic concealed communication method. And the problem that is easy to be identified by the enemy, see the following description for details:

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