Title :
MU-MIMO system performance analysis in LTE evolution
Author :
Mondal, Bishwarup ; Thomas, Timothy A. ; Ghosh, Amitava
Author_Institution :
Motorola Inc., Arlington Heights, IL, USA
Abstract :
It has been recognized that a primary method of further enhancing the spectral efficiency of LTE Release-8 is to improve support for multi-user (MU) MIMO transmission in the downlink in an efficient manner. This paper investigates the performance improvements due to the enhanced support of single-cell MU-MIMO within the framework of LTE evolution (specifically LTE Release-9 and Release-10 also known as LTE-Advanced) considering a 4Tx-2Rx system. A realistic estimate of achievable MU-MIMO full-buffer throughput performance is provided with respect to variations in the propagation environment, feedback accuracy, antenna polarizations, antenna calibration as well as receiver type. It is observed that a closely spaced uniform linear array (ULA) at the base station and interference rejection capability at the mobile is essential to maximize MU-MIMO gains. Further, channel reciprocity based spatial channel feedback in a TDD scenario can provide significantly higher MU-MIMO throughput compared to codebook based feedback.
Keywords :
Long Term Evolution; MIMO communication; interference suppression; linear antenna arrays; LTE evolution; MU-MIMO system performance analysis; TDD scenario; antenna calibration; antenna polarizations; base station; channel reciprocity; codebook based feedback; interference rejection capability; multiuser MIMO transmission; spaced uniform linear array; spatial channel feedback; spectral efficiency; Interference; MIMO; Mobile communication; Receiving antennas; Throughput; Wideband; LTE; LTE Advanced; MIMO; MU-MIMO;
Conference_Titel :
Personal Indoor and Mobile Radio Communications (PIMRC), 2010 IEEE 21st International Symposium on
Conference_Location :
Instanbul
Print_ISBN :
978-1-4244-8017-3
DOI :
10.1109/PIMRC.2010.5671971
