Title :
On the optimal relay design for multi-antenna cognitive two-way AF relay networks
Author :
Girnyk, Maksym A. ; Vehkapera, Mikko ; Vorobyov, Sergiy A.
Author_Institution :
Sch. of Electr. Eng., KTH R. Inst. of Technol., Stockholm, Sweden
Abstract :
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.
Keywords :
amplify and forward communication; antenna arrays; cognitive radio; matrix algebra; precoding; radiofrequency interference; relay networks (telecommunication); amplify and forward strategy; interference constraint; multiantenna cognitive two-way AF relay network; optimal relay precoder matrix; secondary network; spectrum scarcity; Array signal processing; Cognitive radio; Interference; Optimization; Relays; Resource management;
Conference_Titel :
Signals, Systems and Computers, 2014 48th Asilomar Conference on
Print_ISBN :
978-1-4799-8295-0
DOI :
10.1109/ACSSC.2014.7094731
