Underwater acoustic signal detection method based on Rydberg atomic radar

Abstract

The invention discloses an underwater acoustic signal detection method based on a Rydberg atomic radar, and the method comprises the steps: transmitting a microwave signal to a water surface through a multi-frequency-band microwave source, enabling the microwave signal of each frequency band to sense the fluctuation of the water surface and generate a reflection echo, carrying out the primary receiving of the reflection echo of the microwave signal of each frequency band through a Rydberg atomic antenna array, and carrying out the secondary receiving of the reflection echo of the microwave signal of each frequency band; and inverting a water surface fluctuation signal according to the micro-Doppler effect, and fitting a sound induced component through high-pass filtering. The performance of a traditional radar is upgraded through the capability advantages of Rydberg atoms in the aspects of high-sensitivity electromagnetic signal sensing, ultra-wideband multi-band parallel signal detection and the like, so that the requirement for micro-Doppler water surface fluctuation measurement is met; meanwhile, due to the fact that the working frequency of the underwater sound signals is larger than the fluctuation frequency of water surface waves, high-frequency effective information can be extracted from low-frequency strong background noise through a high-pass filter, and a brand-new and feasible underwater sound signal detection means with upgraded performance is provided for underwater exploration, hydrographic survey, diving search and rescue and the like.

Description

technical field [0001] The invention belongs to the interdisciplinary subject of microwave radar and underwater acoustic detection, and specifically refers to a multi-band microwave source to transmit signals to the water surface, use the Rydberg atomic array to receive the water surface signals, and realize the micro-Doppler effect caused by the fluctuation of the water surface. A method for detecting an underwater acoustic signal, in particular to an underwater acoustic signal detecting method, system and storage medium based on a Rydberg atomic radar. Background technique [0002] The Rydberg state close to the excited state can be prepared through the interaction between the laser light field and the energy level of the alkali metal. The Rydberg state will produce energy level splitting under the action of an electric field. The degree of energy level splitting is the frequency shift and the electric field. Intensity is positively correlated. Therefore, the Rydberg Atom...

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Problems solved by technology

[0004] Based on the problems of the prior art, the technical problem to be solved by the present invention is: how to transmit microwave signals to the water surface through a multi-band microwave source, the microwave signals generate echoes under the action of water surface fluctuations, and use the same Rydberg atomic antenna array to simultaneously receive each frequency band The reflected echo of the microwave signal is used to invert the water surface fluctuation according to the micro-Doppler effect, and the accuracy is further improved through the mutual verification of the signals in each frequency band. Finally, high-pass filtering is used to separate the high-frequency components in the Doppler signal and filter out the water surface fluctuation. Equal strong background noise and extract high frequency underwater acoustic signal

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