多天線系統(tǒng)中面向物理層安全的極化編碼方法

白慧卿; 金梁; 肖帥芳; 易鳴

doi:10.11999/JEIT170068

多天線系統(tǒng)中面向物理層安全的極化編碼方法

doi: 10.11999/JEIT170068

基金項目:

國家863計劃項目(2015AA01A708)，國家青年科學基金(61501516)

計量
- 文章訪問數(shù): 842
- HTML全文瀏覽量: 120
- PDF下載量: 211
- 被引次數(shù): 0
出版歷程
- 收稿日期: 2017-01-19
- 修回日期: 2017-05-12
- 刊出日期: 2017-11-19

Polar Code for Physical Layer Security in Multi-antenna Systems

Funds:

The National 863 Program of China (2015AA01A708), The National Natural Science Foundation for Young Scientists of China (61501516)

摘要

摘要: 該文提出一種基于多輸入信道最大容量差映射的極化安全編碼方法，通過適當降低信道極化速度達到提高安全傳輸速率的目的。首先，利用信道極化結構，將極化后的邏輯信道按信道質(zhì)量劃分為好信道與差信道兩類；然后，通過具體的邏輯信道刪除率迭代分析，提出一種能夠有效提升差邏輯信道容量并降低好邏輯信道容量的最大容量差信道映射方法，達到降低信道極化速度的目的；最后，利用加權修正合法信道與竊聽信道最大容量差映射結果，實現(xiàn)多輸入信道下的極化安全編碼。仿真結果表明，在極化階數(shù)n=9的二進制刪除信道下，所提方法相比隨機映射與Arikan方法，安全傳輸速率分別由0.029, 0.004提升到了0.042，并且所提方法同樣適用于衰落信道場景。
- 極化編碼 /
- 物理層安全 /
- 信道映射 /
- 多輸入信道
Abstract: A maximal-capacity-difference mapping-based secrecy polar coding method is proposed. It improves the secrecy rate by reducing the channel polarization speed. First, the polarized channels are divided into two categoryies based on the polarization structure: the good quality ones and the bad quality ones. By analyzing the eraser rates of the polarized channels, a maximal-capacity-difference mapping method is proposed. Through improving the capacity of the bad polarized channels and reducing that of the good polarized channels, the channel polarization speed decreases efficiently. Finally, weighting is adopted to modify the maximal-capacity-difference mapping results between legitimate channels and wiretap channels, thus the secrecy polar coding in multi-input channel is implemented. Simulation results verify that the secrecy rate of proposed method in binary erasure channels can be increased from 0.029 and 0.004 to 0.042, compared to the random mapping method and Arikans method at polarization ordern=9, respectively. And the proposed method also works in fading channels.
- Polar codes /
- Physical layer security /
- Channel mapping /
- Multi-input channel

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參考文獻(18)

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