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首页> 外文期刊>IEEE Transactions on Information Theory >The Gaussian Multiple Access Wire-Tap Channel
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The Gaussian Multiple Access Wire-Tap Channel

机译:高斯多址窃听通道

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摘要

We consider the Gaussian multiple access wire-tap channel (GMAC-WT). In this scenario, multiple users communicate with an intended receiver in the presence of an intelligent and informed wire-tapper who receives a degraded version of the signal at the receiver. We define suitable security measures for this multiaccess environment. Using codebooks generated randomly according to a Gaussian distribution, achievable secrecy rate regions are identified using superposition coding and time-division multiple access (TDMA) coding schemes. An upper bound for the secrecy sum-rate is derived, and our coding schemes are shown to achieve the sum capacity. Numerical results are presented showing the new rate region and comparing it with the capacity region of the Gaussian multiple-access channel (GMAC) with no secrecy constraints, which quantifies the price paid for secrecy.
机译:我们考虑了高斯多址窃听通道(GMAC-WT)。在这种情况下,多个用户会在智能和明智的窃听者在场的情况下与目标接收器进行通信,窃听者会在接收器处接收到信号的降级版本。我们为此多访问环境定义了合适的安全措施。使用根据高斯分布随机生成的码本,使用叠加编码和时分多址(TDMA)编码方案来标识可达到的保密率区域。得出了保密求和率的上限,并显示了我们的编码方案可以达到求和能力。数值结果显示了新的速率区域,并将其与没有保密约束的高斯多址访问信道(GMAC)的容量区域进行了比较,从而量化了为保密支付的价格。

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