發(fā)布時(shí)間：2018-05-27 22:03

  本文選題：中繼系統(tǒng) + 全雙工��； 參考：《浙江大學(xué)》2017年碩士論文

【摘要】：在無(wú)線通信領(lǐng)域,通信能力和通信安全是兩個(gè)最值得關(guān)注的方面。在通信能力方面,中繼技術(shù)作為一種提升系統(tǒng)吞吐量和擴(kuò)大系統(tǒng)覆蓋范圍的技術(shù),正受到越來(lái)越多的關(guān)注。在通信安全方面,物理層安全技術(shù),由于其安全性在數(shù)學(xué)上可以得到確切地證明,被認(rèn)為是一種極具潛力的安全方案。因而,中繼安全系統(tǒng)是一個(gè)有意思的研究方向�？紤]到帶內(nèi)全雙工技術(shù)可以為中繼安全系統(tǒng)帶來(lái)信息吞吐量和安全性能兩方面的提升,于是,本論文圍繞全雙工中繼安全系統(tǒng),對(duì)其安全傳輸機(jī)制和資源分配問題進(jìn)行研究,主要內(nèi)容如下:首先,我們考慮單天線情況下,多個(gè)數(shù)據(jù)源-目的節(jié)點(diǎn)對(duì)和多個(gè)全雙工中繼子節(jié)點(diǎn)的安全中繼網(wǎng)絡(luò),研究如何通過安全資源分配來(lái)實(shí)現(xiàn)系統(tǒng)的可實(shí)現(xiàn)安全速率的最大化。對(duì)于該問題,我們先針對(duì)單一全雙工中繼安全鏈路提出了基于人工噪聲的安全傳輸策略,并推導(dǎo)了其可實(shí)現(xiàn)安全速率。在此基礎(chǔ)上,網(wǎng)絡(luò)安全速率最大化問題建模為一個(gè)混合整數(shù)非線性規(guī)劃(Mixed-Integer Nonlinear Progranmming,MINLP)問題,并進(jìn)一步分解為能量因子分配和中繼子節(jié)點(diǎn)選擇兩個(gè)子問題。針對(duì)這兩個(gè)問題,我們分別提出了基于粒子群(Particle Swarm Optimization,PSO)算法的最優(yōu)能量分配方案和基于最大二部圖權(quán)重匹配(Maximal Bipartite Weighted Matching,MBWM)算法的最佳中繼節(jié)點(diǎn)選擇方案。仿真結(jié)果表明,AN技術(shù)與全雙工技術(shù)配合,可以在自干擾信號(hào)得到有效的抑制時(shí),顯著提高系統(tǒng)安全性能。同時(shí),本文提出的安全資源分配方案相比其他幾種方案,具有明顯的性能優(yōu)勢(shì)。其次,我們研究了多天線情況下,MIMOME(Multiple Input Multiple Output Multi-antenna Eavesdropper)全雙工中繼安全系統(tǒng)下的安全資源分配問題,著重考慮了竊聽鏈路只有統(tǒng)計(jì)CSI反饋情況下的系統(tǒng)安全性能。對(duì)于該問題,我們先給出了基于多天線AN技術(shù)的安全通信機(jī)制,并推導(dǎo)了系統(tǒng)可實(shí)現(xiàn)安全速率的閉式表達(dá)式。為了最大化系統(tǒng)可實(shí)現(xiàn)安全速率,我們接著提出了基于粒子群-差分進(jìn)化(PSO-Differential Evolution,PSO-DE)算法的任意能量分配方案�？紤]到該方案的復(fù)雜度,我們進(jìn)而提出兩種簡(jiǎn)化方案。仿真結(jié)果表明,簡(jiǎn)化算法與基于PSO-DE的任意能量分配方案可以實(shí)現(xiàn)一致的安全速率,本文中提出的基于AN的全雙工安全通信策略和對(duì)應(yīng)的安全資源分配方案可以實(shí)現(xiàn)不錯(cuò)的干擾抑制性能。
[Abstract]:In the field of wireless communication, communication capability and communication security are the two most worthy of attention. In terms of communication capacity, relay technology, as a technology to improve system throughput and expand system coverage, is receiving more and more attention. In the aspect of communication security, physical layer security technology is considered to be a potential security scheme because its security can be proved mathematically. Therefore, relay security system is an interesting research direction. Considering that the in-band full-duplex technology can improve the information throughput and security performance of the relay security system, this paper focuses on the security transmission mechanism and resource allocation of the full-duplex relay security system. The main contents are as follows: firstly, we consider the secure relay network with multiple data source-destination node pairs and multiple full duplex relay sub-nodes under the condition of single antenna. This paper studies how to maximize the security rate of the system through the allocation of security resources. To solve this problem, we first propose a secure transmission strategy based on artificial noise for a single full-duplex relay secure link, and derive its realizable security rate. On this basis, the network security rate maximization problem is modeled as a mixed integer nonlinear programming problem called Mixed-Integer Nonlinear granmming MINLPproblem, which is further decomposed into two sub-problems: energy factor allocation and relay sub-node selection. To solve these two problems, we propose an optimal energy allocation scheme based on particle swarm optimization Swarm optimization (PSO) algorithm and an optimal relay node selection scheme based on the maximal bipartite graph weight matching algorithm (Maximal Bipartite Weighted matching). The simulation results show that the combination of an technique and full-duplex technology can significantly improve the security performance of the system when the self-interference signal is effectively suppressed. At the same time, the security resource allocation scheme proposed in this paper has obvious performance advantages compared with other schemes. Secondly, we study the security resource allocation problem in the full duplex relay security system with multiple Input Multiple Output Multi-antenna dropper in the case of multiple antennas, and focus on the security performance of the eavesdropping link under the condition of statistical CSI feedback. For this problem, we first give a secure communication mechanism based on multi-antenna an technology, and derive the closed-form expression of the system security rate. In order to maximize the security rate of the system, we propose an arbitrary energy allocation scheme based on PSO-differential evolution PSO-DEE algorithm. Considering the complexity of the scheme, we propose two simplified schemes. The simulation results show that the simplified algorithm can achieve the same security rate as the arbitrary energy allocation scheme based on PSO-DE. The full duplex security communication strategy and the corresponding security resource allocation scheme proposed in this paper can achieve good interference suppression performance.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN92;TN918

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本文編號(hào)：1943947