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Measurement Analysis and Channel Modeling for TOA-Based Ranging in Tunnels
Vladimir Savic, Javier Ferrer-Coll, Per Angskog +3
A robust and accurate positioning solution is required to increase the safety in GPS-denied environments. Although there is a lot of available research in this area, little has bee…
Massive MU-MIMO Downlink TDD Systems with Linear Precoding and Downlink Pilots
Hien Quoc Ngo, Erik G. Larsson, Thomas L. Marzetta
We consider a massive MU-MIMO downlink time-division duplex system where a base station (BS) equipped with many antennas serves several single-antenna users in the same time-freque…
Uplink Performance of Time-Reversal MRC in Massive MIMO Systems Subject to Phase Noise
Antonios Pitarokoilis, Saif Khan Mohammed, Erik G. Larsson
Multi-user multiple-input multiple-output (MU-MIMO) cellular systems with an excess of base station (BS) antennas (Massive MIMO) offer unprecedented multiplexing gains and radiated…
Constant-Envelope Multi-User Precoding for Frequency-Selective Massive MIMO Systems
Saif Khan Mohammed, Erik G. Larsson
We consider downlink precoding in a frequency-selective multi-user Massive MIMO system with highly efficient but non-linear power amplifiers at the base station (BS). A low-complex…
Massive MIMO for Next Generation Wireless Systems
Erik G. Larsson, Ove Edfors, Fredrik Tufvesson +1
Multi-user Multiple-Input Multiple-Output (MIMO) offers big advantages over conventional point-to-point MIMO: it works with cheap single-antenna terminals, a rich scattering enviro…
Multi-Pair Amplify-and-Forward Relaying with Very Large Antenna Arrays
Himal A. Suraweera, Hien Quoc Ngo, Trung Q. Duong +2
We consider a multi-pair relay channel where multiple sources simultaneously communicate with destinations using a relay. Each source or destination has only a single antenna, whil…