arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2001.06932cs.CRcs.ITmath.IT
收藏

连续时间系统中的隐蔽通信

Covert Communication in Continuous-Time Systems

Ke Li, Don Towsley, Dennis Goeckel

摘要:

最近的工作已经考虑了发射机爱丽丝的能力,以可靠地通信到接收机鲍勃没有被发现的监狱长威利。这些作品通常假设一个标准的离散时间模型。但是,在标准通信场景中的离散时间模型的假设往往是基于其等价于连续时间模型,这还没有建立的隐蔽通信问题。在这里,我们直接考虑连续时间信道,研究是否仍然可以实现有效的隐蔽通信。我们假设,一个不知情的干扰机是目前协助爱丽丝,我们认为加性高斯白噪声(AWGN)信道之间的所有各方。对于具有近似带宽W的信道,我们建立构造,使得O(WT)信息比特可以在两个单独的场景中在T秒内从Alice隐蔽且可靠地传输到Bob:1)当Alice和Willie之间的路径损耗已知时;以及2)当Alice和Willie之间的路径损耗未知时。

英文摘要:

Recent works have considered the ability of transmitter Alice to communicate reliably to receiver Bob without being detected by warden Willie. These works generally assume a standard discrete-time model. But the assumption of a discrete-time model in standard communication scenarios is often predicated on its equivalence to a continuous-time model, which has not been established for the covert communications problem. Here, we consider the continuous-time channel directly and study if efficient covert communication can still be achieved. We assume that an uninformed jammer is present to assist Alice, and we consider additive white Gaussian noise (AWGN) channels between all parties. For a channel with approximate bandwidth W, we establish constructions such that O(WT) information bits can be transmitted covertly and reliably from Alice to Bob in T seconds for two separate scenarios: 1) when the path-loss between Alice and Willie is known; and 2) when the path-loss between Alice and Willie is unknown.

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。

↑