TY - JOUR
T1 - Performance of massive MIMO uplink with zero-forcing receivers under delayed channels
AU - Papazafeiropoulos, Anastasios K.
AU - Ngo, Hien Quoc
AU - Ratnarajah, Tharmalingam
N1 - © 2016 IEEE.
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PY - 2017/4/1
Y1 - 2017/4/1
N2 - In this paper, we analyze the performance of the uplink communication of massive multicell multiple-input multiple-output (MIMO) systems under the effects of pilot contamination and delayed channels because of terminal mobility. The base stations (BSS) estimate the channels through the uplink training and then use zero-forcing (ZF) processing to decode the transmit signals from the users. The probability density function (pdf) of the signal-to-interference-plus-noise ratio (SINR) is derived for any finite number of antennas. From this pdf, we derive an achievable ergodic rate with a finite number of BS antennas in closed form. Insights into the impact of the Doppler shift (due to terminal mobility) at the low signal-to-noise ratio (SNR) regimes are exposed. In addition, the effects on the outage probability are investigated. Furthermore, the power scaling law and the asymptotic performance result by infinitely increasing the numbers of antennas and terminals (while their ratio is fixed) are provided. The numerical results demonstrate the performance loss for various Doppler shifts. Among the interesting observations revealed is that massive MIMO is favorable even under channel aging conditions.
AB - In this paper, we analyze the performance of the uplink communication of massive multicell multiple-input multiple-output (MIMO) systems under the effects of pilot contamination and delayed channels because of terminal mobility. The base stations (BSS) estimate the channels through the uplink training and then use zero-forcing (ZF) processing to decode the transmit signals from the users. The probability density function (pdf) of the signal-to-interference-plus-noise ratio (SINR) is derived for any finite number of antennas. From this pdf, we derive an achievable ergodic rate with a finite number of BS antennas in closed form. Insights into the impact of the Doppler shift (due to terminal mobility) at the low signal-to-noise ratio (SNR) regimes are exposed. In addition, the effects on the outage probability are investigated. Furthermore, the power scaling law and the asymptotic performance result by infinitely increasing the numbers of antennas and terminals (while their ratio is fixed) are provided. The numerical results demonstrate the performance loss for various Doppler shifts. Among the interesting observations revealed is that massive MIMO is favorable even under channel aging conditions.
KW - Delayed channels
KW - Massive multiple-input multiple-output (MIMO)
KW - Multiuser MIMO system
KW - Zero-forcing (ZF) processing
UR - http://www.scopus.com/inward/record.url?scp=85018981044&partnerID=8YFLogxK
U2 - 10.1109/TVT.2016.2594031
DO - 10.1109/TVT.2016.2594031
M3 - Article
AN - SCOPUS:85018981044
SN - 0018-9545
VL - 66
SP - 3158
EP - 3169
JO - IEEE Transactions on Vehicular Technology
JF - IEEE Transactions on Vehicular Technology
IS - 4
M1 - 7519076
ER -