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A Method for Robust Security and Rate Optimization Problems in Multi-Antenna Non-Orthogonal Multiple Access Systems Based on Orthogonal Space-Time Block Coding Transmission

A non-orthogonal multiple access, space-time block coding technology, applied in transmission systems, radio transmission systems, baseband system components and other directions, can solve problems such as being vulnerable to eavesdroppers, and achieve the effect of improving security performance

Active Publication Date: 2021-12-07
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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  • A Method for Robust Security and Rate Optimization Problems in Multi-Antenna Non-Orthogonal Multiple Access Systems Based on Orthogonal Space-Time Block Coding Transmission
  • A Method for Robust Security and Rate Optimization Problems in Multi-Antenna Non-Orthogonal Multiple Access Systems Based on Orthogonal Space-Time Block Coding Transmission
  • A Method for Robust Security and Rate Optimization Problems in Multi-Antenna Non-Orthogonal Multiple Access Systems 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 robust security and rate optimization of a multi-antenna non-orthogonal multiple access system based on orthogonal space-time block code transmission. Concealment, the channel information of the eavesdropper we get is not perfect, so considering the worst condition of the eavesdropper, satisfying the constraints of the signal source and relay power constraints and the minimum transmission requirements of weak users, by optimizing the signal transmission end Precoding matrix and power allocation factor to maximize the security and speed of the whole system. The gist of this method is that since the problem is non-convex, we use a method based on a combination of 1D search and bump-constrained procedures to solve the proposed problem. In the process of solving the problem, we also used the method of converting hyperbolic constraints into convex constraints, and the method of using Schur-complement theory (schur complement), S-algorithm (S-procedure). The optimization method of the invention can optimize the performance of the security system, has low implementation complexity, and has high practical value.

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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/02
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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