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

C. Kong ; C. Zhong ; A. K. Papazafeiropoulos ; Michail Matthaiou (Institutionen för signaler och system, Signalbehandling) ; Z. Zhang
2015 IEEE International Symposium on Information Theory (ISIT) (2157-8095). p. 1222-1226. (2015)
[Konferensbidrag, refereegranskat]

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).

Nyckelord: Communication channels (information theory), Information theory, MIMO systems, Signal interference, Signal to noise ratio, Spurious signal noise, Achievable sum rates, Channel impairment, Massive multiple-input- multiple-output system (MIMO), Maximum ratio combining, Power-scaling, Signal-to-interference and noise ratios, Transmit power, Zero forcing receivers, Channel state information

Denna post skapades 2016-06-10.
CPL Pubid: 237562


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Institutioner (Chalmers)

Institutionen för signaler och system, Signalbehandling


Elektroteknik och elektronik

Chalmers infrastruktur