Closed Form Secrecy Capacity of MIMO Wiretap Channels with Two Transmit Antennas

Details Closed Form Secrecy Capacity of MIMO Wiretap Channels with Two Transmit Antennas Closed Form Secrecy Capacity of MIMO Wiretap Channels with Two Transmit Antennas

2011-07-27

arxiv.org/abs/1107.5541v1

Computer Science

Information Theory

1 figure

Scientific paper

A Gaussian multiple-input multiple-output (MIMO) wiretap channel model is considered. The input is a two-antenna transmitter, while the outputs are the legitimate receiver and an eavesdropper, both equipped with multiple antennas. All channels are assumed to be known. The problem of obtaining the optimal input covariance matrix that achieves secrecy capacity subject to a power constraint is addressed, and a closed-form expression for the secrecy capacity is obtained.

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