認(rèn)知無(wú)線電非正交多址接入隨機(jī)網(wǎng)絡(luò)物理層安全性能分析

于寶泉; 蔡躍明; 胡健偉

doi:10.11999/JEIT190049

認(rèn)知無(wú)線電非正交多址接入隨機(jī)網(wǎng)絡(luò)物理層安全性能分析

doi: 10.11999/JEIT190049

陸軍工程大學(xué) 南京 210007

基金項(xiàng)目: 國(guó)家自然科學(xué)基金(61771487, 61371122, 61471393)

詳細(xì)信息

作者簡(jiǎn)介:
于寶泉：男，1996年生，博士生，主要研究方向?yàn)橐苿?dòng)通信等

蔡躍明：男，1961年生，教授，博士生導(dǎo)師，主要研究方向?yàn)橐苿?dòng)通信、協(xié)同通信等

胡健偉：男，1990年生，博士生，主要研究方向?yàn)橐苿?dòng)通信、協(xié)同通信等

通訊作者:
蔡躍明　caiym@vip.sina.com

中圖分類(lèi)號(hào): TN926
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- 被引次數(shù): 0
出版歷程
- 收稿日期: 2019-01-17
- 修回日期: 2019-06-30
- 網(wǎng)絡(luò)出版日期: 2020-01-11
- 刊出日期: 2020-06-04

Performance Analysis of Physical Layer Security for Cognitive Radio Non-Orthogonal Multiple Access Random Network

The Army Engineering University of PLA, Nanjing 210007, China

Funds: The National Natural Science Foundation of China(61771487, 61371122,61471393)

摘要

摘要:
該文針對(duì)干擾源以及竊聽(tīng)節(jié)點(diǎn)均隨機(jī)分布的通信場(chǎng)景，分析了認(rèn)知無(wú)線電啟發(fā)式非正交多址接入(CR-NOMA)網(wǎng)絡(luò)中次用戶(hù)通信對(duì)的安全通信性能。采用隨機(jī)幾何理論，將竊聽(tīng)節(jié)點(diǎn)和干擾節(jié)點(diǎn)建模為服從特定分布的齊次泊松點(diǎn)過(guò)程(PPP)。首先，在保證主用戶(hù)通信對(duì)通信可靠性的前提下，得到了發(fā)端設(shè)定的功率分配系數(shù)，進(jìn)一步得到了次用戶(hù)通信對(duì)的連接中斷概率和安全中斷概率的閉式表達(dá)式。隨后，得到了功率分配系數(shù)隨主用戶(hù)可靠性能約束的變化規(guī)律。最后，研究了次用戶(hù)對(duì)的中斷概率隨著竊聽(tīng)節(jié)點(diǎn)密度、發(fā)端發(fā)送功率的變化情況，結(jié)果表明干擾信號(hào)的增強(qiáng)在降低網(wǎng)絡(luò)可靠性能的同時(shí)，換來(lái)了安全性能的提高。仿真結(jié)果驗(yàn)證了理論分析的正確性。
- 認(rèn)知無(wú)線電 /
- 物理層安全 /
- 啟發(fā)式非正交多址接入 /
- 隨機(jī)分布 /
- 功率分配
Abstract:
This paper analyzes the security communication performance of secondary user communication pairs in Cognitive Radio Non-Orthogonal Multiple Access (CR-NOMA) networks, where interference sources and eavesdropping nodes are randomly distributed. The stochastic geometry theory is used to model the eavesdropping nodes and the interfering nodes as a homogeneous Poisson Point Processes (PPP). Firstly, to ensure the reliability of the primary user communication pairs, the power allocation coefficient set of the sender is obtained, and the closed expressions of the connection outage probability and the secrecy outage probability of the secondary user are further obtained. Then, the variation of the power distribution coefficient with the constraint of the primary user’s reliability is analyzed. Finally, the relationship between outage probability of secondary user communication pairs and the density of the eavesdropping nodes and the transmission power is studied. The research shows that the enhancement of interfering signal reduces the reliability of the system, but brings about a significant improvement of security performance. The simulation results verify the correctness of the theoretical analysis.
- Cognitive Radio (CR) /
- Physical layer security /
- Heuristic Non-Orthogonal Multiple Access (NOMA) /
- Random distribution /
- Power allocation

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圖 1 網(wǎng)絡(luò)模型示意圖

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圖 2 功率分配系數(shù)隨主用戶(hù)中斷概率閾值變化圖

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圖 3 中斷概率隨發(fā)送總功率變化圖

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圖 4 中斷概率隨竊聽(tīng)節(jié)點(diǎn)密度變化圖

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