Disclosed in the present invention are a method for constructing a channel
fingerprint twin, and a
system. In the present invention, a coarse-grained channel
fingerprint and a fine-grained channel
fingerprint are respectively regarded as a physical object and a digital twin object, and image super-resolution technology is used to construct a relationship between the coarse-grained channel fingerprint and the fine-grained channel fingerprint. In the present invention, on the basis of variational
inference and a re-parameterization theory, an evidence lower bound of a fine-grained channel fingerprint twin likelihood is derived to serve as an objective function, and the coarse-grained channel fingerprint is introduced as
side information to design a conditional generative
diffusion model for generating the fine-grained channel fingerprint, wherein the conditional generative
diffusion model can be deployed in a core
computing center of a channel fingerprint twin. In addition, in the present invention, a one-shot
pruning algorithm and multi-objective knowledge
distillation technology are further introduced to acquire a lightweight conditional generative
diffusion model. The method for constructing a channel fingerprint twin provided in the present invention not only ensures the reconstruction accuracy, but also has relatively strong
scalability and generalization capability in
wireless communication scenarios with different fine-grained channel fingerprints.