Effect of channel aging on the sum rate of uplink massive MIMO systems

Chuili Kong, Caijun Zhong, Anastasios Papazafeiropoulos, Hien-Quoc Ngo, Michail Matthaiou, Zhaoyang Zhang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

16 Citations (Scopus)


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).
Original languageEnglish
Title of host publication2015 IEEE International Symposium on Information Theory (ISIT)
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
ISBN (Electronic)978-1-4673-7704-1
Publication statusPublished - Oct 2015


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