儲(chǔ)能-發(fā)送模式的單天線兩跳中繼系統(tǒng)保密速率的優(yōu)化

雷維嘉; 楊小燕; 江雪; 謝顯中

doi:10.11999/JEIJ151371

儲(chǔ)能-發(fā)送模式的單天線兩跳中繼系統(tǒng)保密速率的優(yōu)化

doi: 10.11999/JEIJ151371 cstr: 32379.14.JEIJ151371

基金項(xiàng)目:

國(guó)家自然科學(xué)基金(61471076, 61301123)，長(zhǎng)江學(xué)者和創(chuàng)新團(tuán)隊(duì)發(fā)展計(jì)劃(IRT1299)，重慶市重點(diǎn)實(shí)驗(yàn)室專項(xiàng)經(jīng)費(fèi)

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- 文章訪問(wèn)數(shù): 1254
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出版歷程
- 收稿日期: 2015-12-08
- 修回日期: 2016-05-10
- 刊出日期: 2016-09-19

Secrecy Rate Optimization for Single Antenna Two-hop Relay System in Energy-saving-then-transmitting Mode

Funds:

The National Natural Science Foundation of China (61471076, 61301123), The Program for Changjiang Scholars and Innovative Research Team in University (IRT1299), The Special Fund of Chongqing Key Laboratory

摘要

摘要: 該文研究節(jié)點(diǎn)具有能量收集能力的兩跳中繼系統(tǒng)的物理層安全傳輸方案?？紤]竊聽節(jié)點(diǎn)與源和中繼節(jié)點(diǎn)間都有直接鏈路的情況。每個(gè)數(shù)據(jù)傳輸時(shí)隙分為能量收集和數(shù)據(jù)傳輸兩個(gè)階段，各節(jié)點(diǎn)用收集的能量發(fā)送信號(hào)。中繼采用放大轉(zhuǎn)發(fā)方式，目的節(jié)點(diǎn)發(fā)送人工噪聲進(jìn)行協(xié)作干擾，保護(hù)在兩跳傳輸中傳輸?shù)谋Ｃ苄畔?。以最大化保密速率為目?biāo)，采用迭代算法優(yōu)化能量吸收和數(shù)據(jù)傳輸兩階段的時(shí)間分配比例系數(shù)和協(xié)作干擾功率分配因子。仿真結(jié)果表明優(yōu)化算法準(zhǔn)確，優(yōu)化后的協(xié)作干擾方案能顯著提高系統(tǒng)的保密傳輸速率。由于考慮了竊聽節(jié)點(diǎn)在兩跳傳輸中都能接收到信號(hào)的可能性，文中方案更貼近實(shí)際，并解決了一個(gè)復(fù)雜的優(yōu)化問(wèn)題。
- 保密速率 /
- 能量收集 /
- 儲(chǔ)能-發(fā)送 /
- 協(xié)作干擾 /
- 中繼
Abstract: A physical layer security transmission protocol in a two-hop relay system is studied. All nodes are equipped with an antenna and have the ability of energy harvesting. There are direct links between the source node and the eavesdropper as well as the relay node and the eavesdropper. Each transmission time slot is divided into two stages, which are respectively used for energy harvesting and data transmitting. The energy harvested is used to send data. The amplify-and-forward protocol is adopted, and the destination node sends artificial noise to protect the information transmitted in the first and second hop. To maximize the secrecy rate, iterative algorithm is used to optimize two variables of the time for energy harvesting and the power of artificial noise. Simulation results show that the optimization algorithm is accurate and the cooperative jamming can effectively improve the secrecy rate. Considering that eavesdropper can intercept the information transmitted in the two hops, the proposed scheme is more practical and can solve a complicate optimization problem.
- Secrecy rate /
- Energy harvesting /
- Save-then-transmit /
- Cooperative jamming /
- Relay

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參考文獻(xiàn)(12)

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