【摘要】：針對(duì)輪流轉(zhuǎn)發(fā)系統(tǒng)中非信任中繼竊聽(tīng)的問(wèn)題,提出一種基于中繼間干擾消除的安全傳輸方案。首先,利用可信中繼與非信任中繼交替轉(zhuǎn)發(fā)產(chǎn)生的中繼間干擾,惡化非信任中繼的竊聽(tīng)條件。然后,利用信號(hào)在時(shí)域上的相關(guān)性進(jìn)行干擾迭代消除,完全消除合法用戶處中繼間干擾,提升合法用戶接收信號(hào)質(zhì)量。在此基礎(chǔ)上,提出了以最小化竊聽(tīng)和容量為目標(biāo)的快速功率分配算法。分析和仿真結(jié)果表明,方案在保障通信效率的同時(shí)抑制了非信任中繼的竊聽(tīng),在仿真條件下,系統(tǒng)的保密速率提升了至少2 bit·s-1·Hz-1。
[Abstract]:In order to solve the problem of non-trusted relay eavesdropping in alternate forwarding system, a secure transmission scheme based on inter-relay interference cancellation is proposed. Firstly, the interference between trusted relay and untrusted relay is used to worsen the eavesdropping condition of untrusted relay. Then the interference is eliminated iteratively by using the correlation of the signal in time domain to eliminate the interference between the legitimate users completely and improve the quality of the received signals by the legitimate users. On this basis, a fast power allocation algorithm aiming at minimizing eavesdropping and capacity is proposed. The results of analysis and simulation show that the scheme not only guarantees the communication efficiency but also suppresses the eavesdropping of the untrusted relay. Under the simulation condition, the security rate of the system increases at least 2 bit s-1 Hz-1..
【作者單位】： 國(guó)家數(shù)字交換系統(tǒng)工程技術(shù)研究中心;
【基金】：國(guó)家高技術(shù)研究發(fā)展計(jì)劃(“863”計(jì)劃)基金資助項(xiàng)目(No.2014AA01A701) 國(guó)家自然科學(xué)基金資助項(xiàng)目(No.61379006,No.61521003,No.61701538)~~
【分類號(hào)】：TN92

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