Cognitive communication physical layer secure energy efficiency optimization method based on artificial noises

A physical layer security, cognitive communication technology, applied in the field of wireless communication network, can solve the problems of artificial noise, eavesdropper interference, reduce the strength of the received signal of the eavesdropping terminal, etc., to improve the overall energy efficiency and improve energy efficiency.

Active Publication Date: 2017-08-08
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

At present, there are two main types of technologies commonly used to suppress the signal reception quality of eavesdroppers. One is to perform beamforming on the transmitted signal, aiming the transmi

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  • Cognitive communication physical layer secure energy efficiency optimization method based on artificial noises
  • Cognitive communication physical layer secure energy efficiency optimization method based on artificial noises
  • Cognitive communication physical layer secure energy efficiency optimization method based on artificial noises

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Embodiment Construction

[0033] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0034] The present invention proposes a method for optimizing security and energy efficiency of the physical layer of cognitive communication based on artificial noise. The cognitive base station performs joint design of secret signal and artificial noise according to the channel state information between itself and the cognitive user, and optimizes the secret signal The power allocation of artificial noise and artificial noise maximizes the energy efficiency of cognitive network security transmission on the basis of ensuring a safe transmission rate. The present invention designs a double-layer optimization algorithm, which solves the outer layer optimization problem by using one-dimensional search, and uses fractional subtraction to solve the inner layer optimization problem. Compared with the traditional average power allocation scheme, the cogni...

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Abstract

The invention discloses a cognitive communication physical layer secure energy efficiency optimization method based on artificial noises. A cognitive base station carries out joint design of secret signals and the artificial noises according to channel state information between the cognitive base station and a cognitive user; and through optimization of power allocation of the secret signals and the artificial noises, on the basis of ensuring a secure transmission rate, the secure transmission energy efficiency of a cognitive network is maximized. According to the method, a double-layer optimization algorithm is designed; an external layer optimization problem is solved through one-dimensional search; an internal layer optimization problem is solved through converting a fractional form into a subtractive form; and compared with a traditional average power allocation scheme, the method has the advantage of clearly improving the energy efficiency of a cognitive communication system.

Description

technical field [0001] The invention relates to a secure transmission method for maximizing system energy efficiency in a cognitive communication physical layer, in particular to a method for optimizing the safety and energy efficiency of a cognitive communication physical layer based on artificial noise, and belongs to the technical field of wireless communication networks. Background technique [0002] With the rapid development of wireless communication technology, people's demand for broadband resources is increasing; however, as a non-renewable scarce resource, radio spectrum has a very limited supply. However, the existing fixed spectrum allocation policy leads to low utilization of spectrum resources, so it is necessary to innovate the existing spectrum management methods. In this context, Cognitive Radio (Cognitive Radio) came into being. By enabling the communication system to have a cognitive function, it allows secondary users to sense and analyze the spectrum, an...

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Application Information

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IPC IPC(8): H04B7/0426H04L25/02H04W24/02H04W72/04H04W72/08H04B17/309
CPCH04B7/043H04B17/309H04L25/0202H04W24/02H04W72/0473H04W72/542Y02D30/70
Inventor 邹玉龙江玉涵欧阳键朱佳
Owner NANJING UNIV OF POSTS & TELECOMM
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