Time-division energy harvesting relay secure transmission scheme based on destination user scrambling

Abstract

The invention discloses a time-division energy harvesting relay secure transmission scheme based on destination user scrambling. The scheme comprises the following steps: in a first time slot, a relay converts a received radio frequency signal into energy through an energy harvesting technology; in a second Time slot, the relay selects one destination user with the largest channel power gain from multiple destination users as a legal user and serves the legal user, remaining unselected destination users serve as potential eavesdropping users, a source sends useful information to the relay, and the legal destination user sends a scrambled signal to the relay; and in a third time slot, after the signal received by the relay is amplified, the signal is broadcast to a destination by use of energy obtained in the first time slot, wherein the destination includes the selected legal user and the potential eavesdropping users. According to the invention, by combining a cooperative scrambling technology with a time-division energy harvesting technology reasonably, the receiving signal-to-noise ratio of an eavesdropping channel is reduced, the network security performance is improved, and safe transmission of the information is guaranteed.

Description

technical field [0001] The patent of the present invention relates to the field of wireless communication and physical layer security, in particular to a time-division energy harvesting relay security transmission scheme based on target user scrambling. Background technique [0002] Scrambling technology is a widely used technology, it is suitable for relay network, in the relay network, the destination user node sends the scrambled signal to the relay, and the relay is processed, amplified and forwarded to broadcast the scrambled signal to the destination (that is, Destination user), since the destination node knows the scrambling signal, it can be eliminated, and the eavesdropping user cannot know the scrambling signal information in advance, and then achieve the effect of interference, thereby improving the security performance of the communication system. [0003] Multi-user diversity is a widely used technology, which utilizes the characteristics of independent fading c...

AI Technical Summary

Problems solved by technology

[0004] In recent years, the research on the wireless network energy simultaneous interpretation technology has received extensive attention. For relay networks that are not convenient for large-scale use of wired energy supply, such as sensor networks, the traditional method is to use battery power, but it will cause network delays in the later stage. The maintenance cost is high, and the battery needs to be replaced or charged regularly

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