Quantum detection constant false alarm rate detection system and method based on entangled state

Abstract

The invention discloses a quantum detection constant false alarm detection system and method based on an entangled state. The method comprises the following steps: obtaining an entangled two-photon signal; converting a reflection signal and a reference light beam into a first electric pulse signal and a second electric pulse signal; performing coincidence counting on the first electric pulse signal and the second electric pulse signal to obtain a coincidence counting value; obtaining a first coincidence probability according to a first coincidence probability calculation formula; obtaining a mean value of the noise according to the coincidence counting values of all the reference units; obtaining conditional probability density according to the mean value of the noise; and obtaining a judgment threshold value according to the conditional probability density and the equivalent false alarm rate, wherein if the result is that the coincidence count value is larger than the judgment threshold value, the judgment result is that the target exists, and if the result is that the coincidence count value is smaller than the judgment threshold value, the judgment result is that the target does not exist. According to the method, the constant false alarm detection technology is utilized to realize that an entangled state quantum detection system adjusts the judgment threshold according to the false alarm probability under different noise conditions, and constant false alarm detection of a target is completed.

Description

technical field [0001] The invention belongs to the technical field of quantum detection, and in particular relates to an entangled state-based constant false alarm detection system and detection method for quantum detection. Background technique [0002] Quantum detection is a new technology that combines quantum mechanics and information science and is applied in the field of information detection. Different from traditional detection technology based on classical electromagnetic wave theory, quantum detection utilizes the quantum characteristics of electromagnetic fields, and has the potential to surpass traditional detection technology and achieve high-sensitivity detection of weak targets with weak signals under high background noise. [0003] Because entangled signals have strong correlation properties beyond classical signals, and can break through the standard quantum limit and reach the Heisenberg limit, in quantum detection, quantum detection technology based on en...

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Problems solved by technology

[0005] However, because the system of the quantum detection system is different from the classical system, and the form and mathematical model of the quantum signal are also very different from the classical system, the constant false alarm detection technology of the existing classical detection system cannot be fully applied to the entangled state quantum detection system.

Moreover, research on CFAR detection methods for entangled state quantum detection systems has not yet been carried out at home and abroad. With the continuous development and application of quantum detection technology, it is of great importance for the research on the theory and method of constant false alarm detection methods for entangled state quantum detection systems. the meaning of

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