Effect of channel aging on the sum rate of uplink massive MIMO systems
Paper in 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
Signal-to-interference and noise ratios
MIMO systems
Communication channels (information theory)
Achievable sum rates
Zero forcing receivers
Signal interference
Power-scaling
Spurious signal noise
Maximum ratio combining
Transmit power
Channel impairment
Channel state information
Massive multiple-input- multiple-output system (MIMO)
Information theory
Author
C. Kong
Zhejiang University
C. J. Zhong
Southeast University
Zhejiang University
A. K. Papazafeiropoulos
Imperial College London
Michail Matthaiou
Chalmers, Signals and Systems, Signal Processing and Biomedical Engineering
Z. Zhang
Zhejiang University
IEEE International Symposium on Information Theory - Proceedings
21578095 (ISSN)
1222-12269781467377041 (ISBN)
Subject Categories
Electrical Engineering, Electronic Engineering, Information Engineering
DOI
10.1109/ISIT.2015.7282650
ISBN
9781467377041