A radio frequency stealth frequency hopping communication method based on four-dimensional hyperchaotic system

Abstract

The embodiment of the invention discloses a radio frequency stealth frequency hopping communication method based on a four-dimensional hyperchaotic system, relates to the field of communication technology, and can alleviate the limited complexity and short period phenomenon of a traditional low-dimensional chaotic system. The invention includes: quantizing the hyper-chaotic real-valued sequence output by the four-dimensional hyper-chaotic system to obtain a frequency numbering sequence and a period numbering sequence; using the hash mapping relationship between the numbering sequence and the frequency hopping pattern to obtain the hyper-chaotic frequency sequence and A hyperchaotic periodic sequence; using the hyperchaotic frequency sequence and the hyperchaotic periodic sequence to obtain a frequency hopping pattern, and performing frequency hopping modulation according to the frequency hopping pattern; and sending a signal. The invention is suitable for the radio frequency stealth design of the active radiation source.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a radio frequency stealth frequency hopping communication method based on a four-dimensional hyperchaotic system. Background technique [0002] In recent years, with the rapid development of the level of sensor components, the detection ability of passive detection systems for active radiation sources has been greatly improved, posing a serious threat to the on-orbit safety of spacecraft. In order to improve the on-orbit survivability of the spacecraft, the active radiation source carried by the spacecraft must be designed with radio frequency stealth. The design of maximum uncertainty of signal is an important strategy of radio frequency stealth theory. The uncertainty design of signal frequency domain, time domain and space domain parameters is used to increase the difficulty of estimating the opponent's reconnaissance equipment, and improve the anti-selection and anti-in...

AI Technical Summary

Problems solved by technology

However, with the continuous deepening of research work, some urgent problems have emerged. For example, with the development of high-performance computing, low-dimensional chaotic systems such as Logistic have low dimensionality, fewer key parameters, and limited complexity. It is difficult to resist the attacks of high-performance computers and advanced computing algorithms, and it is possible to decipher low-dimensional chaotic systems; another example: it is difficult to infinitely improve the computing accuracy of computing platforms such as computers and digital circuits that realize chaotic systems

Under the condition of finite precision, the continuous state of the chaotic system is discretized, and the chaotic characteristics of the system are degraded, resulting in a short-period phenomenon in the output sequence, which affects the uncertainty performance of the chaotic sequence

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