Abstract
We investigate an orthogonal frequency-division multiplexing (OFDM)-based downlink transmission scheme for large-scale multi-user (MU) multiple-input multiple-output (MIMO) wireless systems. The use of OFDM causes a high peak-to-average (power) ratio (PAR), which necessitates expensive and power-inefficient radio-frequency (RF) components at the base station. In this paper, we present a novel downlink transmission scheme, which exploits the massive degrees-of-freedom available in large-scale MU-MIMO-OFDM systems to achieve low PAR. Specifically, we propose to jointly perform MU precoding, OFDM modulation, and PAR reduction by solving a convex optimization problem. We develop a corresponding fast iterative truncation algorithm (FITRA) and show numerical results to demonstrate tremendous PAR-reduction capabilities. The significantly reduced linearity requirements eventually enable the use of low-cost RF components for the large-scale MU-MIMO-OFDM downlink.
Keywords
PrecodingOrthogonal frequency-division multiplexingTelecommunications linkComputer scienceMIMOMIMO-OFDMMulti-user MIMOElectronic engineeringReduction (mathematics)Base stationMultiplexingTransmission (telecommunications)Computer networkTelecommunicationsChannel (broadcasting)MathematicsEngineering
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Publication Info
- Year
- 2013
- Type
- article
- Volume
- 31
- Issue
- 2
- Pages
- 303-313
- Citations
- 197
- Access
- Closed
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Cite This
Christoph Studer,
Erik G. Larsson
(2013).
PAR-Aware Large-Scale Multi-User MIMO-OFDM Downlink.
IEEE Journal on Selected Areas in Communications
, 31
(2)
, 303-313.
https://doi.org/10.1109/jsac.2013.130217
Identifiers
- DOI
- 10.1109/jsac.2013.130217