DocumentCode :
2113373
Title :
Large-scale analysis of linear massive MIMO Precoders in the Presence of Phase Noise
Author :
Krishnan, R. ; Khanzadi, M.R. ; Krishnan, N. ; Wu, Y. ; Graell i Amat, A. ; Eriksson, T. ; Schober, R.
Author_Institution :
Chalmers University of Technology, Sweden
fYear :
2015
fDate :
8-12 June 2015
Firstpage :
1172
Lastpage :
1177
Abstract :
We study the impact of phase noise on the downlink performance of a multi-user multiple-input multiple-output system, where the base station (BS) employs a large number of transmit antennas M. We consider a setup where the BS employs Mosc free-running oscillators, and M/Mosc antennas are connected to each oscillator. For this configuration, we analyze the impact of phase noise on the performance of regularized zero-forcing (RZF) precoding, when M and the number of users K are asymptotically large, while the ratio M/K = β is fixed. We analytically show that the impact of phase noise on the signal-to-interference-plus-noise ratio (SINR) can be quantified as an effective reduction in the quality of the channel state information available at the BS when compared to a system without phase noise. As a consequence, we observe that as Mosc increases, the SINR of the RZF precoder degrades as the interference power increases, and the desired signal power decreases. On the other hand, the variance of the random phase variations caused by the BS oscillators reduces with increasing Mosc. Through simulations, we verify our analytical results, and study the performance of the RZF precoder for different phase noise and channel noise variances.
Keywords :
Antennas; Downlink; Interference; MIMO; Phase noise; Signal to noise ratio;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Communication Workshop (ICCW), 2015 IEEE International Conference on
Conference_Location :
London, United Kingdom
Type :
conf
DOI :
10.1109/ICCW.2015.7247336
Filename :
7247336
Link To Document :
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