Direction Modulation-Based Power Allocation Method for Maximizing Safe Rate in Wireless Networks

Abstract

The invention discloses a method for maximizing safe rate power distribution of a wireless network based on directional modulation, which includes the following contents: establishing a basic model of directional modulation; obtaining the safe rate of a channel according to the basic model of directional modulation; constructing an artificial noise projection matrix by using zero-space projection and useful information beamforming vector; combined with the aforementioned safe rate and artificial noise projection matrix and useful information beamforming vector to obtain the maximum safe rate function about the power allocation factor; according to the maximized safe rate function to find the best The power allocation factor is to complete the maximum safe rate power allocation. The present invention utilizes the maximum safe rate criterion to obtain the optimal power allocation factor, the solution method is more concise, and the effect of maximizing the signal-to-noise ratio in the desired direction and reducing the signal-to-noise ratio in the non-expected direction is achieved, and the method is applicable to any artificial noise projection When the matrix and the useful information beamforming vector are given, the scope of application is relatively wide.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, in particular to a direction modulation-based wireless network maximum security rate power distribution method. Background technique [0002] Wireless network security has a wide range of connotations, including confidentiality, integrity, identity authentication, access control, and availability. From the perspective of information theory, which follows the information encryption and decryption techniques in traditional wired communication, such as Data Encryption Standard and Advanced Encryption Standard, the above wireless security issues have been dealt with at the level of the upper protocol stack. However, the security channel and its security protocol required by the encryption system are still difficult to guarantee, and the distribution and management of its key may also cause system security holes. On the other hand, since this type of technology mainly depends on the co...

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Problems solved by technology

[0005] However, the existing methods still have deficiencies in the design of useful information beamforming vectors and artificial noise projection matrices in the direction modulation model. First, there is randomness in the beamforming vectors and AN projection matrices at the given DM transmitter; second, there is no simultaneous Discuss the situation of non-conspiracy eavesdroppers and accomplice eavesdroppers; the third is that the power distribution has a certain randomness, and the optimization problem is often a multivariate problem, and the results obtained are not necessarily accurate

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