Title :
Downlink distributed beamforming through relays with imperfect CSI
Author :
Zheng, Yi ; Blostein, Steven D.
Author_Institution :
Dept. of Electr. & Comput. Eng., Queen´´s Univ., Kingston, ON, Canada
Abstract :
Future wireless systems face challenges in supporting high-rate multimedia streaming with wide coverage area and at low power. In this paper we study cooperative MIMO systems in the context of imperfect channel estimation with per-user quality-of-service constraints with the objective of minimizing the sum transmission power at the source and relays. Simulation results quantify the different performance tradeoffs obtained in incorporating imperfect CSI into the problem formulation as a function of channel estimation accuracy.
Keywords :
MIMO communication; array signal processing; channel estimation; cooperative communication; media streaming; minimisation; quality of service; radio links; wireless channels; channel state information; cooperative MIMO system; downlink distributed beamforming; high-rate multimedia streaming; imperfect CSI; imperfect channel estimation; per-user quality-of-service constraint; relays; sum transmission power minimization; wide coverage area; wireless systems; Array signal processing; Channel estimation; Interference; Relays; Signal to noise ratio; Training;
Conference_Titel :
Personal Indoor and Mobile Radio Communications (PIMRC), 2011 IEEE 22nd International Symposium on
Conference_Location :
Toronto, ON
Print_ISBN :
978-1-4577-1346-0
Electronic_ISBN :
pending
DOI :
10.1109/PIMRC.2011.6139721