Safety rate maximization synthesis method based on general inverse iteration in direction modulation

A safe rate and direction modulation technology, applied in diversity/multi-antenna systems, space transmit diversity, electrical components, etc., can solve problems such as estimating angle errors, achieve high safe speed, improve safe transmission performance, and increase convergence rate Effect

Inactive Publication Date: 2018-07-27
NANJING UNIV OF SCI & TECH
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Problems solved by technology

[0004] However, in many three-point (transmitter, desired receiver, eavesdropping receiver) directional modulation schemes that do not consider the estimated angle error, how to maximize the security rate is an NP-hard problem

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  • Safety rate maximization synthesis method based on general inverse iteration in direction modulation
  • Safety rate maximization synthesis method based on general inverse iteration in direction modulation
  • Safety rate maximization synthesis method based on general inverse iteration in direction modulation

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Embodiment Construction

[0013] Below in conjunction with accompanying drawing and specific examples, further illustrate the present invention, should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various equivalents of the present invention Modifications in form all fall within the scope defined by the appended claims of this application.

[0014] Given a three-node directional modulation system model, that is, source node, destination node, and eavesdropping node, the base station uses an N-element uniform linear array antenna, the desired user and the eavesdropping user are both single-antenna receivers, and the system works in the direct path. In this case, the baseband signal vector transmitted at the transmitter end is expressed as

[0015]

[0016] In the formula, P s Indicates the total transmit power; β 1...

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Abstract

The invention provides a safety rate maximization synthesis method based on general inverse iteration in direction modulation, comprising the following steps of: before designing a useful signal beamforming vector and an artificial noise projection matrix, firstly initializing the two by using a leakage concept, then updating the artificial noise projection matrix by using a general power iterative (GPI), and synchronously updating the useful signal beam forming vector by the Rayleigh-Ritz method. In order to maximize the safety rate, an alternately iterative structure (AIS) is used in designing the useful signal beam forming vector and the artificial noise projection matrix, and the corresponding safety rate needs to be updated in time. Compared with the traditional direction modulationtechnology, the safety rate of the invention is greatly improved at a medium to high signal-to-noise ratio, a useful signal can be demodulated well in a desired direction and is difficult to recover in an undesired direction, thereby better improving the safety performance of the system.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a synthesis method for maximum security rate based on generalized inverse iteration in direction modulation. Background technique [0002] In recent years, with the rapid development of mobile communication networks, the privacy of information has become particularly important. The traditional upper-level encryption technology only solves problems through mathematical methods. Once the solution to the mathematical problem is found, the communication process is very easy. Attacked by illegal users. Therefore, researchers began to turn their attention to the underlying security transmission technology, that is, the physical layer security transmission technology. The most important point to ensure safe transmission is to improve the communication quality of the expected channel and reduce the quality of the eavesdropping channel, so as to ensure the safe transmissio...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06
CPCH04B7/0617
Inventor 束锋万思明秦耀璐徐玲王进余海周小波桂林卿陆锦辉陆造宇张一晋李骏
Owner NANJING UNIV OF SCI & TECH
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