A low-computation underwater acoustic wake-up method based on multi-carrier signals

Abstract

The invention discloses an underwater acoustic wake-up method with low computation amount based on multi-carrier signals. The method first constructs a corresponding multi-carrier signal for a communication node, and performs absolute value summation of signals in a window at a receiving end to detect signal arrival. , and then use the real fast Fourier transform to perform multiple frequency detections on the signal to realize the detection of wake-up. The method is suitable for precise wake-up at any distance within the maximum communication distance of two underwater acoustic nodes, has a small amount of calculation, and is suitable for a single-chip microcomputer with low power consumption. The communicator can be in a dormant state with low power consumption for a long time underwater.

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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