By Topic

Fair performance comparison between CQI- and CSI-based MU-MIMO for the LTE downlink

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

3 Author(s)
Philipp Frank ; Deutsche Telekom Laboratories, Berlin, Germany ; Andreas Müller ; Joachim Speidel

We compare the performance of the downlink of a 3GPP UTRAN Long Term Evolution (LTE) system with multi-user (MU) multiple input multiple output (MIMO) support and channel state information (CSI) feedback to a standard MU-MIMO LTE system utilizing channel quality indicator (CQI) feedback only. For the latter case, we propose an efficient method for estimating the appropriate MU-MIMO transmission parameters based on the LTE Release 8 feedback, which is not providing any additional MU-MIMO feedback information. In order to facilitate a fair performance comparison, we spend approximately the same number of feedback bits for both feedback methods and we evaluate which method performs better in the considered scenario for various cases by means of extensive system-level simulations, assuming a low-rate feedback channel. It is shown that significant performance gains may be realized with both proposed feedback methods compared to conventional LTE Release 8 networks without MU-MIMO support.

Published in:

Wireless Conference (EW), 2010 European

Date of Conference:

12-15 April 2010