An anti-eavesdropping coding method based on physical layer

Abstract

The invention discloses an anti-eavesdrop coding method based on a physical layer. The anti-eavesdrop coding method based on the physical layer is characterized in that an anti-eavesdrop coding matrix Wi is added in a cooperative communication system, so that signals at a receiving end are randomized; the anti-eavesdrop coding matrix Wi is disintegrated into a static part and a dynamic part, and is generated according to channel state information and information to be transmitted currently. By the method, a low eavesdropping probability is regarded as a standard, after added with the anti-eavesdrop matrix, the original cooperative communication system is transformed into a communication system with a physical layer confidential effect, so that even using blind channel estimation, an eavesdropping end cannot eavesdrop the information of a transmitting end.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to a secret coding method, which is a physical layer-based anti-eavesdropping coding method, and the method is suitable for secret coding of a cooperative communication system. Background technique [0002] Due to the broadcast characteristics of wireless communication, wireless transmission can be eavesdropped by any node within the transmission range, so the confidentiality of wireless transmission is a major problem faced by wireless communication. In order to prevent wirelessly transmitted information from being eavesdropped by unauthorized eavesdroppers, high-level encryption algorithms are often used in wireless networks. The distribution and management of keys in high-level encryption algorithms are difficult and vulnerable to attacks. In a network without infrastructure, such as an Ad Hoc network, it is difficult to implement high-level encryption. [0003] Rec...

AI Technical Summary

Problems solved by technology

In order to prevent wirelessly transmitted information from being eavesdropped by unauthorized eavesdroppers, high-level encryption algorithms are often used in wireless networks. The distribution and management of keys in high-level encryption algorithms are difficult and vulnerable to attacks

In a network without infrastructure, such as an Ad Hoc network, it is difficult to implement high-level encryption

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