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Optimal relay precoder for non-regenerative MIMO cognitive relay systems with underlay spectrum sharing

Optimal relay precoder for non-regenerative MIMO cognitive relay systems with underlay spectrum sharing

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© The Institution of Engineering and Technology
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A study is presented of an optimal relay precoder design for non-regenerative MIMO cognitive relay systems where all the nodes are equipped with multiple antennas. With underlay spectrum sharing, the authors derive the optimal structure of the relay station (RS) precoding matrix to maximise the capacity subject to the transmit power constraint at the RS and the interference power constraint at the primary user (PU). Simulation results demonstrate the effectiveness of the proposed precoder.

Inspec keywords: precoding; MIMO communication; cognitive radio; matrix algebra; antenna arrays

Other keywords: primary user; RS precoding matrix; relay station precoding matrix; multiple-antennas; interference power constraint; transmit power constraint; underlay spectrum sharing; optimal relay precoder design; nonregenerative MIMO cognitive relay systems

Subjects: Algebra; Codes; Antenna arrays; Radio links and equipment

References

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      • D.P. Bertsekas . (1999) Nonlinear programming.
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