A physical layer secure transmission method based on differential chaotic keying based on antenna selection

A differential chaotic keying and antenna selection technology, applied in radio transmission systems, transmission systems, digital transmission systems, etc., can solve the problem of sacrificing bit error performance, reduce complexity and dependence on channels, and improve security performance , high safety effect

Active Publication Date: 2021-09-24
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

Theoretical analysis and simulation results show that compared with the existing MIMO-DCSK, the proposed method can not only improve the security of the system, but also has obvious advantages in spectral efficiency, but slightly sacrifices the bit error performance

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  • A physical layer secure transmission method based on differential chaotic keying based on antenna selection
  • A physical layer secure transmission method based on differential chaotic keying based on antenna selection
  • A physical layer secure transmission method based on differential chaotic keying based on antenna selection

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Embodiment Construction

[0039] The present invention will be further described below in conjunction with drawings and embodiments.

[0040] Such as image 3 As shown, the present invention provides a physical layer encryption method of differential chaotic keying based on antenna selection, which is applied in a massive MIMO system and includes the following steps:

[0041] (S1) Generate key set K 1 and K 2 . Use the key extraction technology based on wireless channel characteristics to generate the initial value of x, substitute it into the Lorenz chaotic mapping system to generate a certain number of chaotic sequences, and choose an appropriate quantization method to quantize the chaotic sequence into a bit sequence, and intercept a certain length of bit sequence , so as to form the key set K required in this paper 1 and K 2 ; Common quantization methods in the prior art include threshold quantization and T transformation, which can be found in references ([1] ZHOU Hong, LING Xie-ting. Generat...

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Abstract

The invention belongs to the field of wireless network communication, and in particular relates to a physical layer security transmission method based on antenna selection-based differential chaos keying. The method is applied in a massive MIMO system, including the following steps: (S1) generating a key K 1 and K 2 ; (S2) establish the corresponding relationship between the memory address in the antenna index Book and the antenna selection and the grouping mode, and use the key K 2 Shuffle the correspondence between the memory address in the antenna index Book and the ASGM, and use the key K 1 Select from the antenna index Book with the key K 1 Corresponding antenna selection and grouping mode in the equal memory address; (S3) the sending end encrypts, determines two reference antennas, and divides the remaining antennas into two groups on average, and divides the information to be transmitted on the two groups of antennas into r 1 and r 2 Perform DCSK modulation, and finally transmit it from the antenna of the sending end of the massive MIMO system; (S4) Deciphering at the receiving end. The security of the key in the invention is high, and the complexity of key generation and the dependence on the channel are reduced.

Description

technical field [0001] The invention belongs to the field of wireless network communication, and in particular relates to a physical layer security transmission method based on antenna selection-based differential chaos keying. Background technique [0002] With the development of modern communication technology, people pay more and more attention to the security and confidentiality of information transmission. The chaotic sequence has the advantages of aperiodicity, unpredictability, similar characteristics to noise, and extreme sensitivity to the initial value, which makes the chaotic signal have natural concealment, low interception and good anti-interference, so the chaotic communication system is widely used in military affairs. Communication, low probability of intercept communication (Low Probability of Intercept, LPI) and other fields have unique advantages, and the differential chaos shift keying (Differential Chaos Shift Keying, DCSK) modulation scheme (see referen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/00H04L27/00H04B7/0413
Inventor 雷菁鲁信金王思鑫李为黄英
Owner NAT UNIV OF DEFENSE TECH
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