Title :
SNR Maximization and Distributed Beamforming in Multiuser Multi-Relay Networks
Author :
Nguyen, Duy H N ; Nguyen, Ha H.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Saskatchewan, Saskatoon, SK, Canada
Abstract :
This paper studies optimal distributed beamforming designs to jointly maximize the signal-to-noise (SNR) margin in a multiuser multi-relay network. Considered are optimization problems with two different types of power constraints: sum relay power constraint and per-relay power constraints. Although these two problems can be readily solved by the bisection method via a sequence of second-order conic feasibility programs, we propose simple and fast converging iterative algorithms to directly solve the two optimization problems under consideration.
Keywords :
array signal processing; iterative methods; multi-access systems; radio networks; bisection method; distributed beamforming; iterative algorithms; multiuser multi-relay networks; per-relay power constraints; second-order conic feasibility programs; signal-to-noise margin; sum relay power constraint; Antenna arrays; Array signal processing; Constraint optimization; Interference constraints; Iterative algorithms; Optimization methods; Power system relaying; Quality of service; Relays; Signal design;
Conference_Titel :
Global Telecommunications Conference, 2009. GLOBECOM 2009. IEEE
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-4244-4148-8
DOI :
10.1109/GLOCOM.2009.5425246
