Extrinsic Channel-Like Fingerprinting Overlays Using Subspace Embedding

The authors 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. Their 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.

Provided by: Institute of Electrical & Electronic Engineers Topic: Mobility Date Added: Dec 2011 Format: PDF

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