【摘要】：在傳播環(huán)境不發(fā)生改變時(shí),唯一能帶來不確定性的因素是用戶位置的不斷變化。該文研究了用戶位置移動(dòng)范圍與無線密鑰生成速率上界的關(guān)系。針對(duì)兩種極端的靜態(tài)環(huán)境場(chǎng)景,分析了其密鑰生成速率上界。結(jié)果表明:在簡單的信道環(huán)境中,信道狀態(tài)分布并不是Gauss分布,此時(shí)的密鑰生成速率上界僅受到用戶位置改變的影響。該文分析了在簡單的單反射面場(chǎng)景下密鑰生成速率上界與信道的估計(jì)誤差之間的關(guān)系。通過數(shù)值仿真得到了多散射點(diǎn)場(chǎng)景下不同信道估計(jì)誤差下的密鑰生成速率上界,結(jié)果表明在合法用戶具有較高信噪比情況下,用戶位置移動(dòng)范圍在1個(gè)波長左右即可獲得較高的密鑰生成速率上界。
[Abstract]:When the communication environment does not change, the only uncertain factor is the changing location of the user. In this paper, the relationship between the range of user location and the upper bound of wireless key generation rate is studied. For two extreme static environment scenarios, the upper bound of key generation rate is analyzed. The results show that in a simple channel environment, the channel state distribution is not Gauss distribution, and the upper bound of the key generation rate is only affected by the user location change. This paper analyzes the relationship between the upper bound of key generation rate and the channel estimation error in a simple single reflector scenario. Through numerical simulation, the upper bound of key generation rate under different channel estimation errors in multi-scattering scene is obtained. The results show that when the legitimate user has a high signal-to-noise ratio (SNR), the upper bound of key generation rate under different channel estimation errors is obtained. A higher upper bound of key generation rate can be obtained when the user's position moves in the range of 1 wavelength or so.
【作者單位】： 清華大學(xué)電子工程系;
【基金】：國家“八六三”高技術(shù)項(xiàng)目(ss2015AA011306)
【分類號(hào)】：TN918.4
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本文編號(hào)：2392334