Conference proceeding
Precoded massive MU-MIMO uplink transmission under transceiver I/Q imbalance
2014 IEEE Globecom Workshops (GC Wkshps), pp 320-326
Dec 2014
Abstract
In massive multiple-input multiple-output (MIMO) systems, combined with digital array processing, the amount of the associated radio frequency (RF) front-ends is inevitably high. This paper addresses how imperfections in these RF front-ends affect the overall system performance in precoded massive multiuser MIMO (MU-MIMO) uplink transmission. In particular, we focus on transceiver in-phase/quadrature (I/Q) imbalances and their mitigation with RF-aware spatial processing. We first derive the essential distortion and interference models for OFDMA-based massive MU-MIMO uplink system under I/Q imbalances, and then propose augmented spatial post-processing to be carried out in the uplink receiver (RX) for mitigating the harmful effects efficiently. Numerical examples show that the augmented spatial RX processing clearly outperforms the conventional linear processing, and thus provides significant performance improvements with practical low-cost RF front-ends.
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11 citations in Scopus
Details
- Title
- Precoded massive MU-MIMO uplink transmission under transceiver I/Q imbalance
- Creators
- Aki Hakkarainen - Dept. of Electron. & Commun. Eng., Tampere Univ. of Technol., Tampere, FinlandJanis Werner - Dept. of Electron. & Commun. Eng., Tampere Univ. of Technol., Tampere, FinlandKapil R Dandekar - Dept. of Electr. & Comput. Eng., Drexel Univ., Philadelphia, PA, USAMikko Valkama - Dept. of Electron. & Commun. Eng., Tampere Univ. of Technol., Tampere, Finland
- Publication Details
- 2014 IEEE Globecom Workshops (GC Wkshps), pp 320-326
- Publisher
- IEEE
- Resource Type
- Conference proceeding
- Language
- English
- Academic Unit
- Electrical and Computer Engineering
- Scopus ID
- 2-s2.0-84946692353
- Other Identifier
- 991014878091204721