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2016

The Diversity-Multiplexing Tradeoff of Secret-Key Agreement Over Multiple Antenna Channels

4 years 2 months ago
The Diversity-Multiplexing Tradeoff of Secret-Key Agreement Over Multiple Antenna Channels
—We consider secret-key agreement with public discussion over Rayleigh fading quasi-static channels. First, the secret-key diversity gain and the secret-key multiplexing gain are defined. Then, the secret-key diversity multiplexing tradeoff (DMT) is established. The eavesdropper is shown to “steal” only transmit antennas. We show that likewise the DMT without secrecy constraint, the secret-key DMT is the same either with or without full channel state information (CSI) at the transmitter (CSI-T). This insensitivity of secretkey DMT toward CSI-T highlights a fundamental difference between secret-key agreement and the wiretap channel whose secret DMT depends crucially on CSI-T. Several secret-key DMT-achieving schemes are presented in case of full CSI-T.
Marwen Zorgui, Zouheir Rezki, Basel Alomair, Moham
Added 11 Apr 2016
Updated 11 Apr 2016
Type Journal
Year 2016
Where TWC
Authors Marwen Zorgui, Zouheir Rezki, Basel Alomair, Mohamed-Slim Alouini
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