© The Institution of Engineering and Technology
Performance of large-scale MIMO systems is restricted by pilot contamination, coherence block length, hardware impairments and other system parameters. In this Letter, the authors aim to improve the bandwidth efficiency (BE) of massive MIMO systems in multi-cell scenarios. An improved version of the zero forcing (ZF) algorithm is proposed, based on that new expressions for BE are derived. The authors have compared the proposed algorithm with the conventional ZF algorithm and simulation results show sufficient improvement of performance in terms of BE.
References
-
-
1)
-
1. Hoydis, J., Brink, S.T., Debbah, M.: ‘Massive MIMO in the UL/DL of cellular networks: how many antennas do we need?’, IEEE J. Sel. Areas Commun., 2013, 31, (2), pp. 160–171 (doi: 10.1109/JSAC.2013.130205).
-
2)
-
8. Ngo, H.Q., Larsson, E.G., Marzetta, T.L.: ‘The multicell multiuser MIMO uplink with very large antenna arrays and a finite-dimensional channel’, IEEE Trans. Commun., 2013, 61, (6), pp. 2350–2361 (doi: 10.1109/TCOMM.2013.032713.120408).
-
3)
-
4. Ngo, H.Q., Larsson, D., Marzetta, T.: ‘Energy and spectral efficiency of very large multiuser MIMO systems’, IEEE Trans. Commun., 2013, 61, (4), pp. 1436–1449 (doi: 10.1109/TCOMM.2013.020413.110848).
-
4)
-
7. Huh, H., Caire, G., Papadopoulos, H., et al: ‘Achieving ‘massive MIMO’ spectral efflciency with a not-so-large number of antennas’, Trans. Wireless Commun., 2012, 11, (9), pp. 3226–3239 (doi: 10.1109/TWC.2012.070912.111383).
-
5)
-
5. Björnson, E., Larsson, E.G., Debbah, M.: ‘Massive MIMO for maximal spectral efflciency: How many users and pilots should be allocated?’, Trans. Wireless Commun..
-
6)
-
1. Larsson, E.G., Tufvesson, F., Edfors, O., et al: , May 2013. .
-
7)
-
1. Marzetta, T.: ‘Noncooperative cellular wireless with unlimited numbers of base station antennas’, IEEE Trans. Wirel. Commun., 2010, 9, pp. 3590–3600 (doi: 10.1109/TWC.2010.092810.091092).
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