Low-operand underwater acoustic wake-up method based on multi-carrier signal

Abstract

The invention discloses a multi-carrier signal-based low-operand underwater acoustic wake-up method, and the method comprises the following steps: constructing a corresponding multi-carrier signal for a communication node, performing absolute value summation on signals in a window at a receiving end to perform signal arrival detection, performing multiple times of frequency point detection on the signals by using real number fast Fourier transform, and realizing the wake-up detection. The method is suitable for accurate awakening of any distance within the maximum communication distance of the two underwater acoustic nodes, is small in operand, and is suitable for a low-power-consumption single chip microcomputer. The communication machine can be in a low-power-consumption dormant state underwater for a long time.

Description

technical field [0001] The invention relates to the communication field of underwater acoustic communicators, in particular to an underwater acoustic wake-up method based on multi-carriers with low computational load. Background technique [0002] In recent years, with the acceleration of ocean development in various countries around the world, countries around the world have begun to study underwater acoustic communication networks, which has greatly promoted the development of underwater acoustic communication systems. Underwater acoustic communication has become a hot topic in current research. The underwater acoustic communication modem is the main application form of most underwater acoustic communication systems. It is generally used in ocean monitoring, remote control and telemetry of various underwater platform equipment, etc., and requires high communication robustness. [0003] When the underwater acoustic communicator uses the battery to transmit information under...

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Problems solved by technology

[0004] Therefore, it is necessary to select a specific waveform as the wake-up waveform, and at the same time, when performing wake-up detection, it will not cause false wake-up due to other signals in the same frequency band in the ocean, or ocean noise, resulting in the switching of the communication machine state and increasing power consumption.

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