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Unconditional physical layer secure cooperative transmission method based on interference alignment technology

A technology of physical layer security and interference alignment algorithm, which is applied in the field of information security assurance in the field of wireless communication technology, can solve the problems such as no implementation method is given, and achieve the effect of low complexity and good security

Active Publication Date: 2016-11-09
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, Shannon and Wyner only gave the theory, did not give a specific implementation method

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  • Unconditional physical layer secure cooperative transmission method based on interference alignment technology
  • Unconditional physical layer secure cooperative transmission method based on interference alignment technology
  • Unconditional physical layer secure cooperative transmission method based on interference alignment technology

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Embodiment Construction

[0041] The present invention will be described in detail below with reference to the drawings and embodiments, but the protection scope of the present invention is not limited to the following embodiments.

[0042]As an important means to solve co-channel interference in wireless communication systems, interference alignment technology can effectively improve spectrum efficiency and thus improve system capacity. The core of the implementation of interference alignment technology is to design a pair of transmit precoding matrix and receive interference suppression matrix, so that the receiver in the wireless network can align the interference signals from the undesired transmitter into the same subspace, and set the interference suppression matrix at the receiving end (forcing the interference signal to zero to obtain the desired signal), in fact, transforming the interference channel into multiple parallel non-interference complex Gaussian channels (see figure 2 indication). ...

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Abstract

The invention provides an unconditional physical layer secure cooperative transmission method based on interference alignment technology. The method comprises the steps that networking and carrying out time-frequency synchronization are carried out at first, and a master control terminal is selected; all transmitting terminals sequentially transmit channel training signals; a receiving terminal carries out estimates a channel state and transmits the channel state to the master control terminal; the master control terminal calculates a precoding matrix and an interference suppression matrix, and then transmits the same to the other transmitting terminals and the receiving terminal; each transmitting terminal carries out binary secure coding on the original business flow, and the encoded bit stream is used as business input to carry out interference alignment transmission; and the receiving terminal carries out secure decoding on the received binary stream to acquire information stream of a user. Compared with the traditional scheme of encrypted and decrypted transmission based on keys, the risks brought by exchanging the keys are avoided firstly, secondly the error rate of an illegal user can approach 0.5 on the theory, so no valid information can be acquired from the information theory significance, and the complexity is relatively low.

Description

technical field [0001] The present invention relates to an information security guarantee method in the technical field of wireless communication, in particular to an unconditional physical layer security cooperative transmission method based on interference alignment technology. Background technique [0002] The open, broadcast nature of wireless communication makes secret calls and transmitted information vulnerable to interception and interception. The existing security mechanisms are all based on computing security, which relies on the assumption of limited computing resources and time of the attacker. With the rapid development of high-speed computers, parallel computing and other technologies, if the key is leaked or used by the attacker If the high-performance computing cluster is cracked, the entire security system will completely collapse. Therefore, finding a high-strength encrypted transmission method is an important task to improve the confidentiality of calls a...

Claims

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Application Information

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IPC IPC(8): H04B7/04H04B7/06H04L25/02
CPCH04B7/0452H04B7/0456H04B7/0626H04L25/0204H04L25/0228H04L25/0256
Inventor 翟立君杨勇李宁
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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