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The problem of energy-efficient resource allocation in multiple-antenna wiretap channels where transmit antennas are correlated is investigated. The use of artificial noise (AN) in combination with only statistical channel state information (CSI) at the legitimate transmitter is considered. The goal of this work is to do the resource allocation such that the amount of bits which can be reliably and...
We consider a multiuser cognitive radio setting where multiple secondary systems, consisting of transmitter-receiver pairs, coexist with multiple primary systems. Each secondary transmitter is equipped with multiple antennas, while all receivers use a single antenna. In this setting, the secondary transmitters are to operate under the constraints of producing restricted amount of interference at the...
Recently, the statistical properties of the equivalent channel representation of a multiple-input-multiple output (MIMO) system employing rate one quasi-orthogonal space-time block codes (QSTBC) for n T=2n, nges2 transmit antennas was characterized. It was shown, that these QSTBC were capable of achieving a significant fraction of the outage mutual information of a MIMO system. In this letter, based...
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