PAR-Aware Large-Scale Multi-User MIMO-OFDM Downlink
2013 (English)In: IEEE Journal on Selected Areas in Communications, ISSN 0733-8716, E-ISSN 1558-0008, Vol. 31, no 2, 303-313 p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE) , 2013. Vol. 31, no 2, 303-313 p.
Convex optimization, multi-user wireless communication, multiple-input multiple-output (MIMO), orthogonal frequency-division multiplexing (OFDM), peak-to-average (power) ratio (PAR) reduction, precoding
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-89744DOI: 10.1109/JSAC.2013.130217ISI: 000313966200017OAI: oai:DiVA.org:liu-89744DiVA: diva2:609366
Funding Agencies|Swiss National Science Foundation (SNSF)|PA00P2-134155|Swedish Foundation for Strategic Research (SSF)||Swedish Research Council (VR)||Royal Swedish Academy of Sciences (KVA) Research Fellow||Knut and Alice Wallenberg Foundation||2013-03-052013-03-052016-08-31