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arXiv 0705.1183cs.ITmath.IT
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无线网络上的多天线安全广播

Multiple Antenna Secure Broadcast over Wireless Networks

Ruoheng Liu, H. Vincent Poor

摘要:

在无线数据网中,由于其广播性质,通信特别容易受到窃听。安全和隐私系统对于无线提供商和企业网来说已经变得至关重要。本文研究了高斯广播信道上的保密通信问题,其中多天线发射机向两个用户发送独立的保密消息,且具有完全保密性。也就是说,每个用户都希望可靠且保密地获得其自己的消息。首先,一个可计算的Sato型外边界上的保密容量区域提供了一个多天线广播信道的机密消息。接下来,描述了一种脏纸安全编码方案及其简化版本。对于每种情况下,相应的可达到的速率区域推导出完美的保密要求。最后,通过两个数值例子证明了Sato型外界与简化的脏纸编码保密率域的边界是一致的。

英文摘要:

In wireless data networks, communication is particularly susceptible to eavesdropping due to its broadcast nature. Security and privacy systems have become critical for wireless providers and enterprise networks. This paper considers the problem of secret communication over the Gaussian broadcast channel, where a multi-antenna transmitter sends independent confidential messages to two users with perfect secrecy. That is, each user would like to obtain its own message reliably and confidentially. First, a computable Sato-type outer bound on the secrecy capacity region is provided for a multi-antenna broadcast channel with confidential messages. Next, a dirty-paper secure coding scheme and its simplified version are described. For each case, the corresponding achievable rate region is derived under the perfect secrecy requirement. Finally, two numerical examples demonstrate that the Sato-type outer bound is consistent with the boundary of the simplified dirty-paper coding secrecy rate region.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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