On the optimal relay design for multi-antenna cognitive two-way AF relay networks

Cognitive relaying is an efficient method for tackling the problem of spectrum scarcity by serving new (secondary) users, while keeping the existing (primary) users satisfied with their service. Moreover, additional gains can be attained from employment of the two-way relaying with multiple-antenna...

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Bibliographic Details
Published in:Conference record - Asilomar Conference on Signals, Systems, & Computers pp. 1579 - 1583
Main Authors: Girnyk, Maksym A., Vehkapera, Mikko, Vorobyov, Sergiy A.
Format: Conference Proceeding
Language:English
Published: IEEE 01.11.2014
Subjects:
Array signal processing
Cognitive radio
Interference
Optimization
Relays
Resource management
ISSN:1058-6393
Online Access:Get full text
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Summary:Cognitive relaying is an efficient method for tackling the problem of spectrum scarcity by serving new (secondary) users, while keeping the existing (primary) users satisfied with their service. Moreover, additional gains can be attained from employment of the two-way relaying with multiple-antenna relays within the secondary network. In this paper, we consider an underlay two-way cognitive network and propose an efficient algorithm for computing a (nearly) optimal relay precoder matrix subject to the interference constraint towards the primary network. The efficiency of the proposed solution is highlighted by means of numerical simulations.
ISSN:1058-6393
DOI:10.1109/ACSSC.2014.7094731