物理層安全約束下的AF雙向中繼系統(tǒng)波束賦形和人工干擾聯(lián)合設(shè)計(jì)
發(fā)布時(shí)間:2018-06-16 14:43
本文選題:物理層安全 + 雙向中繼系統(tǒng); 參考:《信號(hào)處理》2014年11期
【摘要】:波束賦形和人工干擾是現(xiàn)有研究中最為常見的兩種物理層安全增強(qiáng)技術(shù),本文針對(duì)AF(放大轉(zhuǎn)發(fā))雙向中繼模型,探討了兩者的聯(lián)合設(shè)計(jì)問題。在已知理想信道狀態(tài)信息的條件下,本文提出了一種波束賦形和人工干擾的混合協(xié)同傳輸方案,推導(dǎo)了總功率受限條件下的和安全速率,通過兩步迭代搜索算法得到了其最佳聯(lián)合方案,并與一種低復(fù)雜度的次佳聯(lián)合方案進(jìn)行比較。仿真結(jié)果驗(yàn)證了所得聯(lián)合方案優(yōu)于次佳聯(lián)合方案,并進(jìn)一步改善了AF雙向中繼系統(tǒng)的安全性能。
[Abstract]:Beamforming and artificial interference are two of the most common physical layer security enhancement techniques. In this paper, the joint design of the two methods is discussed for the AFR (amplifying and forwarding) bidirectional relay model. Under the condition that the ideal channel state information is known, a hybrid cooperative transmission scheme with beamforming and artificial interference is proposed, and the sum security rate under the condition of total power constraint is derived. The optimal joint scheme is obtained by two-step iterative search algorithm and compared with a low-complexity sub-optimal joint scheme. The simulation results show that the proposed scheme is superior to the sub-optimal scheme, and the security performance of AF bidirectional relay system is further improved.
【作者單位】: 解放軍理工大學(xué)通信工程學(xué)院;
【基金】:國家自然科學(xué)基金(61371122,61301162) 中國博士后科學(xué)基金(2013T60912)資助項(xiàng)目
【分類號(hào)】:TN918
【參考文獻(xiàn)】
相關(guān)期刊論文 前1條
1 曹闊;林志;管新榮;楊文東;印國祥;;物理層安全約束下的雙向中繼系統(tǒng)波束賦形方案[J];軍事通信技術(shù);2013年01期
,本文編號(hào):2027048
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