Resource allocation for parallel Gaussian MIMO wire-tap channels

Authors:
Vincent Le Nir;Bart Scheers
Affiliations:
Royal Military Academy, Dept. Communication, Information Systems & Sensors, Brussels, Belgium;Royal Military Academy, Dept. Communication, Information Systems & Sensors, Brussels, Belgium
Venue:
IEEE Communications Letters
Year:
2010

Citing 4
Cited 0

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Wireless Communications: Principles and Practice
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An MMSE approach to the secrecy capacity of the MIMO Gaussian wiretap channel

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A note on the secrecy capacity of the multiple-antenna wiretap channel

IEEE Transactions on Information Theory

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Abstract

Wire-tap channels are able to provide perfect secrecy when a receiver exhibits a better channel than its wiretapping opponent. In this letter, we extend the perfect secrecy principle to parallel Gaussian multiple input multiple output (MIMO) wire-tap channels with independent sub-channels. Assuming Nr ≥ Nt and Ne ≥ Nt, mathematical derivations show that a sub-optimal solution can be given in closed-form considering either secrecy rate maximization subject to a total power constraint or power minimization subject to a secrecy rate constraint. Although sub-optimal for MIMO systems, simulation results show that the proposed algorithm allows to reach higher secrecy rates with substantial gains in power consumption compared to the single input single output (SISO) system.