Open AccessPerformance analysis for downlink massive multiple‐input multiple‐output system with channel state information delay under maximum ratio transmission precoding
Author(s) -
Zhao Long,
Zheng Kan,
Long Hang,
Zhao Hui,
Wang Wenbo
Publication year - 2014
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.2013.0209
Subject(s) - precoding , telecommunications link , computer science , channel (broadcasting) , transmission (telecommunications) , channel state information , maximal ratio combining , zero forcing precoding , computer network , telecommunications , algorithm , control theory (sociology) , mimo , wireless , artificial intelligence , fading , control (management)
This study comprehensively investigates the performance of the downlink massive multiple‐input multiple‐output (MIMO) system with channel state information (CSI) delay, when the base station serves multiple user terminals (UTs) taking advantage of maximum ratio transmission precoding. Through the characteristic analysis of the received signal‐to‐interference‐plus‐noise ratio at UT, the tight lower bound of average area spectrum efficiency (SE) and its asymptotic bound with the infinite number of UTs are deduced, respectively. Based on the asymptotic bound and the realistic power consumption model consisting of both radiated power and circuit power, the trade‐off between SE and energy efficiency (EE) is developed, and the optimal EE with respect to SE is attained concisely. Moreover, the approximate expressions of both outage probability and bit error ratio (BER) are derived when the massive MIMO system works at its interference limited region. All theoretical results coincide to numerical results, and they show that deploying more transmission antennas will be helpful to improve SE, EE and reliability simultaneously; SE will be enhanced; however, the reliability, including both outage probability and BER, will be worsened by multiplexing more UTs; enlarging CSI delay can extensively deteriorate SE, EE and reliability.