Artificial noise-based power allocation method applied to collaborative network under main channel non-ideal channel estimation condition

Abstract

The invention discloses an artificial noise-based power allocation method applied to a collaborative network under a main channel non-ideal channel estimation condition. According to the method of the invention, a collaboration jammer is additionally adopted to send jamming signals, and a collaboration relation is built; the collaboration jammer designs jamming signals by using channel state information obtained by using an ideal channel estimation method, so as to realize a jamming effect; an emission source designs emission signals according to an optimal power allocation ratio obtained by optimization carried out under an ideal channel estimation condition; a system can achieve a security transmission rate after the emission signals pass through a channel having estimation error; the difference of the security transmission rate and the security rate of the system under the ideal channel estimation condition is obtained by comparison; the importance of considering that a main channel has estimation error is verified; and a more reliable and practical power allocation scheme is put forward.

Description

technical field [0001] The invention belongs to the field of information technology security, and in particular relates to a power allocation method in a collaborative network based on artificial noise under the condition of non-ideal channel estimation of a main channel. Background technique [0002] The broadcast characteristics of the wireless medium lead to the security threat that wireless communication is particularly vulnerable to eavesdropping, which brings great challenges to the design of wireless systems. Achieving safe and reliable communication in wireless environment has become a key issue. Traditional security issues are solved by upper-layer encryption technology based on network security protocols. These methods still have loopholes in the process of key distribution and management. At the same time, as the computing power of computers continues to increase, existing security encryption algorithms face the risk of being cracked. In this context, by explor...

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Problems solved by technology

However, in practical applications, this assumption is not reasonable

[0004] For the case where the main channel is a non-ideal channel estimate, the artificial noise vector of the channel design obtained by considering the estimation of the error with the actual channel will have an inevitable impact on the legal receiver, which will lead to the SINR of the legal receiver (Signal to Interference plus Noise Ratio, SINR) reduction

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