Effect of channel aging on the sum rate of uplink massive MIMO systems
Paper i proceeding, 2015
This paper investigates the achievable sum-rate of uplink massive multiple-input multiple-output (MIMO) systems considering a practical channel impairment, namely, aged channel state information (CSI). Taking into account both maximum ratio combining (MRC) and zero-forcing (ZF) receivers at the base station, we present tight closed-form lower bounds on the sum-rate for both receivers, which provide efficient means to evaluate the sum-rate of the system. More importantly, we characterize the impact of channel aging on the power scaling law. Specifically, we show that the transmit power of each user can be scaled down by 1/√M, which indicates that aged CSI does not affect the power scaling law; instead, it causes only a reduction on the sum rate by reducing the effective signal-to-interference-and-noise ratio (SINR).
Signal to noise ratio
Massive multiple-input- multiple-output system (MIMO)
Channel impairment
Communication channels (information theory)
Zero forcing receivers
Maximum ratio combining
Signal-to-interference and noise ratios
Transmit power
MIMO systems
Information theory
Achievable sum rates
Power-scaling
Channel state information
Signal interference
Spurious signal noise
Författare
C. Kong
Zhejiang University
C. J. Zhong
Southeast University
Zhejiang University
A. K. Papazafeiropoulos
Imperial College London
Michail Matthaiou
Chalmers, Signaler och system, Signalbehandling och medicinsk teknik
Z. Zhang
Zhejiang University
2015 IEEE International Symposium on Information Theory (ISIT), Hong Kong, CHINA, JUN 14-19, 2015
2157-8095 (ISSN)
1222-12269781467377041 (ISBN)
Ämneskategorier (SSIF 2011)
Elektroteknik och elektronik
DOI
10.1109/ISIT.2015.7282650
ISBN
9781467377041