A low-complex peak-to-average power reduction scheme for OFDM based massive MIMO systems
Prabhu H, Edfors O, Rodrigues J, Liu L, Rusek F (2014)
Publication Type: Conference contribution
Publication year: 2014
Publisher: IEEE Computer Society
Pages Range: 114-117
Conference Proceedings Title: ISCCSP 2014 - 2014 6th International Symposium on Communications, Control and Signal Processing, Proceedings
Event location: GRC
ISBN: 9781479928903
DOI: 10.1109/ISCCSP.2014.6877829
Abstract
An Orthogonal Frequency-Division Multiplexing (OFDM) based multi-user massive Multiple-Input Multiple-Output (MIMO) system is considered. The problem of high Peak-to-Average Ratio (PAR) in OFDM based systems is well known and the large number of antennas (RF-chains) at the Base Station (BS) in massive MIMO systems aggravates this further, since large numbers of these Power Amplifiers (PAs) are used. High PAR necessitates linear PAs, which have a high hardware cost and are typically power inefficient. In this paper we propose a low-complex approach to tackle the issue. The idea is to deliberately clip signals sent to one set of antennas, while compensating for this by transmitting correction signals on a set of reserved antennas (antenna-reservation). A reduction of 4dB in PAR is achieved by reserving 25% of antennas, with only a 15% complexity overhead. © 2014 IEEE.
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APA:
Prabhu, H., Edfors, O., Rodrigues, J., Liu, L., & Rusek, F. (2014). A low-complex peak-to-average power reduction scheme for OFDM based massive MIMO systems. In ISCCSP 2014 - 2014 6th International Symposium on Communications, Control and Signal Processing, Proceedings (pp. 114-117). GRC: IEEE Computer Society.
MLA:
Prabhu, Hemanth, et al. "A low-complex peak-to-average power reduction scheme for OFDM based massive MIMO systems." Proceedings of the 6th International Symposium on Communications, Control and Signal Processing, ISCCSP 2014, GRC IEEE Computer Society, 2014. 114-117.
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