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首页> 外文期刊>Information Forensics and Security, IEEE Transactions on >Extrinsic Channel-Like Fingerprinting Overlays Using Subspace Embedding
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Extrinsic Channel-Like Fingerprinting Overlays Using Subspace Embedding

机译：使用子空间嵌入的外部通道样指纹叠加

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摘要

We present a physical-layer fingerprint-embedding scheme for orthogonal frequency-division-multiplexing (OFDM) transmissions, where the fingerprint signal conveys a low capacity communication suitable for authenticating the transmission and further facilitating secure communications. Our system strives to embed the fingerprint message into the noise subspace of the channel estimates obtained by the receiver, using a number of signal spreading techniques. When side information of the channel state is known and leveraged by the transmitter, the performance of the fingerprint embedding can be improved. When channel state information is not known, blind spreading techniques are applied. The fingerprint message is only visible to aware receivers who explicitly preform detection of the signal, but is invisible to receivers employing typical channel equalization. A taxonomy of overlay designs is discussed and these designs are explored through experiment using time-varying channel-state information (CSI) recorded from IEEE802.16e Mobile WiMax base stations. The performance of the fingerprint signal as received by a WiMax subscriber is demonstrated using CSI measurements derived from the downlink signal. Detection performance for the digital fingerprint message in time-varying channel conditions is also presented via simulation.
机译：我们提出了一种用于正交频分复用（OFDM）传输的物理层指纹嵌入方案，其中指纹信号传达了适合于验证传输并进一步促进安全通信的低容量通信。我们的系统努力使用多种信号扩展技术将指纹消息嵌入到接收机所获得的信道估计的噪声子空间中。当信道状态的边信息是已知的并且被发射机利用时，可以提高指纹嵌入的性能。当信道状态信息未知时，应用盲扩技术。指纹消息仅对明确执行信号检测的有意识接收器可见，而对采用典型信道均衡的接收器不可见。讨论了覆盖设计的分类法，并使用从IEEE802.16e移动WiMax基站记录的时变信道状态信息（CSI），通过实验探索了这些设计。 WiMax用户接收到的指纹信号的性能通过使用从下行链路信号得出的CSI测量值进行了演示。还通过仿真介绍了在时变信道条件下数字指纹消息的检测性能。

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