By Topic

Coordinated beamforming with reduced overhead for the downlink of multiuser MIMO systems

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Eun Yong Kim ; Department of Electrical Engineering and Computer Science, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea ; Joohwan Chun

We consider the coordinated beamforming for the downlink of multiuser multiple-input multiple-output (MIMO) systems. Since each mobile needs to obtain effective channel parameters by using dedicated pilots each beamformed by a user-specific transmit beamformer, the pilot overhead increases linearly with the number of users. In this paper, we propose a novel technique that reduces the pilot overhead using the orthogonal property of effective channels. Simulation results show that the proposed approach achieves higher sum-rate, because unused pilot tones can be utilized to transmit additional data instead.

Published in:

IEEE Communications Letters  (Volume:12 ,  Issue: 11 )