Secure communication system based on random time sequence four-dimensional circular ring array

A random timing and secure communication technology, applied in wireless communication, phase-modulated carrier system, security device, etc., can solve the problems of insufficient security, and achieve the effect of high security and narrow confidential communication width

Inactive Publication Date: 2019-08-16
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This scheme provides a new four-dimensional antenna array secure communic

Method used

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  • Secure communication system based on random time sequence four-dimensional circular ring array
  • Secure communication system based on random time sequence four-dimensional circular ring array
  • Secure communication system based on random time sequence four-dimensional circular ring array

Examples

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Effect test

Embodiment 1

[0027] Example 1: BPSK modulation of 8-unit four-dimensional circular array based on random timing

[0028] Based on the basic scheme, one can construct as reference figure 1 The BPSK modulation system shown. In this embodiment, eight omnidirectional array units are used to form a time-modulated antenna array. The transmitter system mainly includes a circular ring antenna array 1, a phase shifter 2, a time modulator 3, a pseudo-random timing generator 4, a circulator 5, a power amplifier 6, a transmitting synthesis divider 7, and a receiving common power divider 8 , Transmitter 9 and receiver 10 etc.

[0029] In this embodiment, we determine the signal source in the basic scheme as the BPSK signal source, the antenna unit is an ideal omnidirectional radiation antenna, the distance between adjacent antenna units is d=0.5λ, and the radius of the ring array is 0.65λ where λ is the wavelength of the transmitted signal. The 8 antenna units of the antenna array are respectively ...

Embodiment 2

[0030] Example 2: BPSK modulation of 24-unit four-dimensional circular array based on random timing

[0031] In this example, we expand the number of antenna elements in Example 1 to 24. We determine the signal source in the basic scheme as the BPSK signal source, the antenna unit is an ideal omnidirectional radiation antenna, the distance between adjacent antenna units is d=0.5λ, and the radius of the circular array is 1.91λ, where λ is the radius of the transmitted signal wavelength. The 24 antenna units of the antenna array are respectively controlled to be turned on by 24 time modulators, and the time modulators are centrally controlled by a pseudo-random timing generator. like Figure 5 As shown, 4 of the 24 antenna units are randomly selected for conduction in each period of time τ, and 4 are randomly selected for conduction again in the next period of time τ, and so on, there are 4 antenna units at any time The unit remains on so that the antenna gain does not change...

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Abstract

The invention discloses a secure communication system based on random time sequence four-dimensional circular ring array. The basic structure comprises a circular ring antenna array, a phase shifter,a time modulator, a pseudo-random time sequence generator, a circulator, a power amplifier, a transmitting combination success divider, a receiving common power divider, a transmitter, a receiver andthe like. The biggest innovation of the invention lies in that random time modulation is used, so that the antenna gain in a desired direction is not changed and the antenna gain in an undesired direction is not changed randomly. The method can be applied to all modulation systems based on amplitude and phase, such as BPSK, QPSK and the like. The circular ring array is introduced, so that omnidirectional secure communication can be realized. Compared with an existing secure communication mode based on a four-dimensional antenna array, the method provides a new random time modulation mode, onlyrandom and messy signals can be received in the unexpected direction, the problem that an existing system is insufficient in safety is solved, and full-airspace secure communication can be achieved.The present invention is used in a wireless communication system.

Description

technical field [0001] The invention belongs to the field of wireless communication, and particularly relates to omnidirectional secret communication by using a circular four-dimensional array modulated by random time. Background technique [0002] The rapid development of wireless communication technology has made the consequences of data confidentiality more and more serious. Secure communication is a communication method that adopts modulation and encryption technology for the content of information to be transmitted, so as to conceal the true content of the information, so that illegal interceptors cannot Understand the meaning of communication content. The related research on the confidentiality of wireless communication systems at home and abroad is mainly divided into the upper layer technology of secure communication and the physical layer security technology of secure communication. The information content sent and received by the wireless communication system, the...

Claims

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Application Information

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IPC IPC(8): H04W12/00H04W12/02H04L27/20H04W12/03
CPCH04W12/02H04L27/20H04W12/03
Inventor 杨仕文屈川鸿陈科锦陈益凯屈世伟胡俊
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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