Open AccessPerformance analysis of zero‐forcing‐precoded scheduling system with adaptive modulation for multiuser‐multiple input multiple output transmission
Author(s) -
Lee Donghun
Publication year - 2015
Publication title -
iet communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.355
H-Index - 62
eISSN - 1751-8636
pISSN - 1751-8628
DOI - 10.1049/iet-com.2015.0201
Subject(s) - link adaptation , computer science , scheduling (production processes) , quadrature amplitude modulation , round robin scheduling , spectral efficiency , fair share scheduling , control theory (sociology) , bit error rate , real time computing , electronic engineering , algorithm , fading , mathematics , telecommunications , mathematical optimization , engineering , decoding methods , control (management) , artificial intelligence , beamforming , quality of service
In this study, the author presents performance analysis of a zero‐forcing (ZF)‐precoded scheduling system with adaptive modulation for multiuser‐multiple input multiple output transmission. The proposed scheduling system adapts the transmission rate and selects the best modulation to satisfy a given target bit error rate (BER). The author derive the tight closed‐form expressions of the ZF‐precoded system with adaptive modulation for the average spectral efficiency where user set non‐scheduling and user set scheduling methods are presented. The author also presents the tight closed‐form BER expressions of the non‐scheduling and scheduling systems with adaptive modulation for M ‐ary quadrature amplitude modulation and M ‐ary phase shift keying modulation. From the analytical results, the author shows that the proposed scheduling system provides performance improvement of the average spectral efficiency over the non‐scheduling system. Moreover, the proposed system provides the signal to noise ratio gain compared with the non‐scheduling system to satisfy the target BER regardless of modulation types. This is because the diversity order of the proposed system is superior to that of the non‐scheduling system by multi‐user diversity.