Space encryption method based on three-dimensional CAP constellation

Abstract

The invention belongs to the technical field of communication, and particularly relates to a space encryption method based on a three-dimensional CAP constellation. The space encryption method comprises the following steps: taking a Logistic Map model as a first chaos model, and generating a first-level masking factor for performing exclusive-or operation on pseudo-random input data; taking the super-four-wing chaotic model as a second chaotic model and used for generating a second-level masking factor and a third-level masking factor which are used for carrying out displacement transformation and spatial transformation on the three-dimensional CAP constellation respectively; and applying the three-level masking factor to encryption modulation of the three-dimensional CAP constellation. According to the method, two chaos models are combined, exclusive-or operation is firstly carried out on pseudo-random input data, then displacement transformation and spatial transformation of a three-dimensional constellation are realized, and the effect of communication security can be effectively improved; according to the spatial encryption method based on the three-dimensional CAP constellation, the encryption flexibility is improved, and meanwhile, due to the fact that the Euclidean distance is larger than that of a two-dimensional constellation, higher encryption performance is achieved, and meanwhile better bit error rate performance is achieved.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a space encryption method based on a three-dimensional CAP constellation. Background technique [0002] Due to the emergence of various communication technologies, the application of the fifth generation mobile communication technology (5G), virtual reality, 4k video frequency, etc., the continuous development of the modulation technology with both low cost and high reliability has become an important aspect of communication development. Key research methods. Carrier-free amplitude / phase (CAP) modulation has the advantages of better spectrum utilization and low complexity, while the multi-dimensional CAP modulation technology not only improves the data transmission rate, but also improves the CAP system throughput and user multiple access, etc. Further development of performance provides more space. [0003] In addition, with the rapid development of the Inter...

AI Technical Summary

Problems solved by technology

However, the traditional encryption algorithm, such as the encryption algorithm based only on Logistic Map, has a simple structure, low computational complexity, and is vulnerable to brute force attacks and statistical analysis attacks, and the system security based only on LogisticMap encryption is low

Images