An indoor secure communication scheme based on time reverse technology

A technology of time reversal and technology, applied in the direction of wireless communication, baseband system, baseband system components, etc.

Inactive Publication Date: 2019-03-19
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

Aiming at the problem of how to reduce inter-symbol interference at the legal receiving end and improve the confidentiality performance by using time reversal technology, and considering not to increase the computational complexity of the legal receiving end of the signal, the equalizer and TRM are cascaded at the signal sending end, and all transmitting antennas share the equalizer

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  • An indoor secure communication scheme based on time reverse technology
  • An indoor secure communication scheme based on time reverse technology
  • An indoor secure communication scheme based on time reverse technology

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Embodiment Construction

[0073] In order to express the object, technical solution and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation cases.

[0074] figure 1 The MISO eavesdropping channel model diagram of channel equalization combined with time inversion proposed in the present invention specifically includes:

[0075] Aiming at the eavesdropping channel problem of physical layer wireless communication, an equalized time inversion technique is proposed to improve the secrecy performance of indoor frequency selective fading channel. For the legitimate receiver using the traditional TR technology, Intersymbol Interference (ISI) occupies a larger component in the received signal. This will have an impact on the system: (1) the system security signal-to-noise ratio is low, which will affect the system security performance; (2) the signal will be distorted at the r...

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Abstract

Aiming at the problem of channel eavesdropping in physical layer wireless communication, the invention provides an indoor secure communication scheme based on time reverse technology. Firstly, an equalized time reverse eavesdropping model is established, the equalizer is cascaded at the signal transmitting end, and the channel equalization technology is used to improve the confidentiality of information transmission. Secondly, the equalizer is designed through the equivalent channel analysis of traditional time reverse (TR) technology. The closed expression of the system secure signal dry-noise ratio, system security capacity, and bit error rate is derived based on the equalized channel. Theoretical analysis and simulation results show that compared with the traditional TR technology, ETR's confidential signal dry-noise ratio and system security capacity are higher, and the legal receiver's error rate is lower.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to an indoor secure communication scheme based on time reversal technology. Background technique [0002] Wireless communication has the characteristics of openness, and the information transmission between terminals is easy to be eavesdropped by illegal users, which makes the information security of wireless communication face a severe test. Since the wireless channel has the characteristics of frequency domain, space domain and time domain diversity, it provides a research space for wireless communication security. Wyner first proposed the eavesdropping channel model. According to information theory, he proposed to use the difference of wireless channels to ensure the security of information transmission, and proved that there is a certain security code that can realize the transmission rate not greater than the security capacity to ensure the safe transmission of i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W12/02H04L25/03
CPCH04L25/03006H04W12/02
Inventor 朱江丁强张海波
Owner CHONGQING UNIV OF POSTS & TELECOMM
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