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Method for solving robust security and rate optimization problems of multi-antenna non-orthogonal multiple access system based on orthogonal space-time block coding transmission

A technology of space-time block coding and non-orthogonal multiple access, which is applied in transmission systems, radio transmission systems, baseband system components, etc., and can solve problems such as being vulnerable to eavesdroppers

Active Publication Date: 2019-08-09
SUN YAT SEN UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to solve the defect that the wireless communication system in the prior art is easily eavesdropped by eavesdroppers during the transmission process, and propose a robust security system based on orthogonal space-time block coded transmission for multi-antenna non-orthogonal multiple access systems and a method for rate optimization problems

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  • Method for solving robust security and rate optimization problems of multi-antenna non-orthogonal multiple access system based on orthogonal space-time block coding transmission
  • Method for solving robust security and rate optimization problems of multi-antenna non-orthogonal multiple access system based on orthogonal space-time block coding transmission
  • Method for solving robust security and rate optimization problems of multi-antenna non-orthogonal multiple access system based on orthogonal space-time block coding transmission

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Embodiment 1

[0073] A method for robust security and rate optimization problems of multi-antenna non-orthogonal multiple access systems based on orthogonal space-time block coded transmission, please refer to figure 1 , including the following steps:

[0074] S1: Establish a multi-antenna non-orthogonal multiple access system based on orthogonal space-time block coding transmission. The system consists of a signal source, a base station, two legitimate users and a covert eavesdropper, wherein each The system nodes are all equipped with K antennas; the signal source and the relay end send information by using orthogonal space-time block coding; wherein the channel from the signal source to the relay end is defined as H in the system r , the channel from the relay end to the legal user U1 is H 1 , the channel from the relay end to the legitimate user U2 is H 2 , the channel from the relay to the potential eavesdropper U3 is H 3 , the

[0075]

[0076] where H 3 represents the true ch...

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Abstract

The invention discloses a method for solving robust security and rate optimization problems of a multi-antenna non-orthogonal multiple access system based on orthogonal space-time block coding transmission. An eavesdropper in the system can steal data; meanwhile, the eavesdropper is hidden, the channel information of the eavesdropper obtained by the eavesdropper is imperfect, so that under the worst condition of the eavesdropper, the signal source and relay power constraint and the constraint of the minimum transmission requirement of a weak user are met, and the safety and the rate of the whole system are maximized by optimizing a precoding matrix and a power distribution factor of a signal transmission end. The method is characterized in that the problem is non-convex, so that a method based on combination of one-dimensional search and a concave-convex constraint process is used for solving the problem. In the process of solving the problem, a method for converting hyperbolic constraints into convex constraints and a method using a Schur-Complementary Theory and an S-Procedure algorithm are also used. According to the optimization method, the performance of the safety system canbe optimized, the implementation complexity is low, and the practical value is high..

Description

technical field [0001] The present invention relates to the technical field of wireless communication, and more specifically, relates to a method for robust security and rate optimization of a multi-antenna non-orthogonal multiple access system based on orthogonal space-time block coded transmission. Background technique [0002] With the rapid development of portable smart terminals and 5G communication technology, people are urgently looking for a method for efficient spectrum resource utilization, and non-orthogonal multiple access technology (NOMA) emerged as the times require. Efficient utilization requirements, and can bring system performance gains. In NOMA technology, the sending end will superimpose the information sent to multiple users and then send it out, and the receiving end will use serial interference cancellation technology (SIC) to eliminate interference signals and get the desired signal. [0003] Configuring multiple antennas at the signal source and re...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/0413H04B7/0456H04B17/336H04B17/382H04L25/02
CPCH04B7/0413H04B7/0456H04L25/0204H04B17/336H04B17/382
Inventor 闫建飞李全忠张旗秦家银
Owner SUN YAT SEN UNIV
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