基于人工噪聲預(yù)編碼的多天線中繼安全性能分析

趙睿; 賀玉成; 周林; 謝維波

doi:10.11999/JEIT160053

基于人工噪聲預(yù)編碼的多天線中繼安全性能分析

doi: 10.11999/JEIT160053

2.
(華僑大學(xué)廈門市移動(dòng)多媒體通信重點(diǎn)實(shí)驗(yàn)室廈門 361021) ②(西安電子科技大學(xué)ISN國(guó)家重點(diǎn)實(shí)驗(yàn)室西安 710071)

基金項(xiàng)目:

國(guó)家自然科學(xué)基金(61401165, 61302095, 61271383)，福建省自然科學(xué)基金(2015J01262, 2014J01243)

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- 文章訪問(wèn)數(shù): 1336
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出版歷程
- 收稿日期: 2016-01-13
- 修回日期: 2016-06-20
- 刊出日期: 2016-10-19

Secrecy Performance Analysis of Multiple-antenna Relay Systems with Artificial Noise Precoding

2.
(Xiamen Key Laboratory of Mobile Multimedia Communications, Huaqiao University, Xiamen 361021, China)

Funds:

The National Natural Science Foundation of China (61401165, 61302095, 61271383), The Natural Science Foundation of Fujian Province (2015J01262, 2014J01243)

摘要

摘要: 為提升存在竊聽者的中繼網(wǎng)絡(luò)的安全性能，在多天線放大轉(zhuǎn)發(fā)中繼端采用人工噪聲預(yù)編碼(ANP)和特征波束形成(EB)安全傳輸策略，推導(dǎo)了ANP和EB的可達(dá)安全速率(EASR)閉合表達(dá)式。在中繼配置大規(guī)模天線時(shí)，推導(dǎo)了ANP的EASR下界，并在高信噪比和低信噪比情況下研究了漸近性能。分析和仿真結(jié)果顯示，在中高信噪比區(qū)域，ANP相比于EB可獲得顯著的性能增益，而在低信噪比區(qū)域，EB優(yōu)于ANP。當(dāng)信噪比增加時(shí)，EB的EASR接近一個(gè)與第1跳無(wú)關(guān)的常數(shù)。在高信噪比區(qū)域，ANP的最優(yōu)功率分配方案是將一半左右的功率分配給人工噪聲。
- 物理層安全 /
- 放大轉(zhuǎn)發(fā)中繼 /
- 人工噪聲 /
- 遍歷可達(dá)安全速率
Abstract: To improve the secrecy performance of relay networks in the presence of one eavesdropper, the Artificial Noise Precoding (ANP) and Eigen-Beamforming (EB) secure transmission schemes are appilied at the multiple-antenna amplify-and-forward relay, and the new tight closed-form expressions of the Ergodic Achievable Secrecy Rate (EASR) for two schemes are derived. The lower bound of the EASR for ANP is derived with a large antenna array at the relay, and its corresponding asymptotic performance is investigated in the high SNR and low SNR regimes to show valuable intrinsic insights. Analysis and Simulation results show that, in the moderate-to-high SNR regime, ANP achieves remarkable performance gain over EB, while in the low SNR regime, EB outperforms ANP. Moreover, in the high SNR regime, it is optimal to allocate around half of total power to artificial noise for ANP.
- Physical layer security /
- Amplify-and-forward relay /
- Artificial noise /
- Ergodic Achievable Secrecy Rate (EASR)

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參考文獻(xiàn)(19)

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