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Wireless Personal Communications
Erschienen in: Wireless Personal Communications 3/2015

01.04.2015

Linear Relaying Design for Spectrum Sharing Non-regenerative MIMO Cognitive Multiple-Relay Systems

verfasst von: Quanzhong Li, Renhai Feng, Jiayin Qin

Erschienen in: Wireless Personal Communications | Ausgabe 3/2015

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Abstract

In this paper, we study optimal precoding matrix for spectrum sharing multiple-input multiple-output (MIMO) cognitive multiple-relay systems. Our aim is to maximize the system capacity subject to the total relay transmit power constraint and the interference power constraint at the primary user. For general case, all the nodes have multiple antennas. The precoder design problem is a non-convex problem. Currently there is no global optimal solution for it. We propose a suboptimal algorithm in which we first transform the original precoder design problem to a unitary matrix constrained problem. And then, we develop a modified Riemannian steepest descent algorithm (MRSDA) to solve it. For the special case that the secondary user has a single antenna and other nodes have multi-antennas, we propose an optimal solution based on rank-one decomposition theorem to transform the original problem into a semidefinite programming. Simulation results demonstrate the effectiveness of the proposed precoding matrix design algorithms.
Vorheriger Artikel Mutual Authentication and Updating the Authentication Key in MANETS
Nächster Artikel Bit Error Rate of SSTS for Downlink Distributed Antenna Systems in Multicell Environment

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Fußnoten
1
The imperfect CSI case will be considered in our future work.
 
2
We adopt the assumption that the interference from the PU to SU is neglected as [4‐12]. In IEEE 802:22 standard, the secondary wireless regional area network (WRAN) is located far away from the primary transmitter and hence the interference from the primary transmitter can be neglected at the secondary receiver.
 
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Metadaten
Titel
Linear Relaying Design for Spectrum Sharing Non-regenerative MIMO Cognitive Multiple-Relay Systems
verfasst von
Quanzhong Li
Renhai Feng
Jiayin Qin
Publikationsdatum
01.04.2015
Verlag
Springer US
Erschienen in
Wireless Personal Communications / Ausgabe 3/2015
Print ISSN: 0929-6212
Elektronische ISSN: 1572-834X
DOI
https://doi.org/10.1007/s11277-014-2170-8

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