• Publications
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Noncooperative Cellular Wireless with Unlimited Numbers of Base Station Antennas
  • T. Marzetta
  • Computer Science
  • IEEE Transactions on Wireless Communications
  • 1 November 2010
A cellular base station serves a multiplicity of single-antenna terminals over the same time-frequency interval and a complete multi-cellular analysis yields a number of mathematically exact conclusions and points to a desirable direction towards which cellular wireless could evolve. Expand
Scaling Up MIMO: Opportunities and Challenges with Very Large Arrays
The gains in multiuser systems are even more impressive, because such systems offer the possibility to transmit simultaneously to several users and the flexibility to select what users to schedule for reception at any given point in time. Expand
Energy and Spectral Efficiency of Very Large Multiuser MIMO Systems
It is shown that the use of moderately large antenna arrays can improve the spectral and energy efficiency with orders of magnitude compared to a single-antenna system. Expand
Massive MIMO for next generation wireless systems
While massive MIMO renders many traditional research problems irrelevant, it uncovers entirely new problems that urgently need attention: the challenge of making many low-cost low-precision components that work effectively together, acquisition and synchronization for newly joined terminals, the exploitation of extra degrees of freedom provided by the excess of service antennas, reducing internal power consumption to achieve total energy efficiency reductions, and finding new deployment scenarios. Expand
Cell-Free Massive MIMO Versus Small Cells
Under uncorrelated shadow fading conditions, the cell-free scheme provides nearly fivefold improvement in 95%-likely per-user throughput over the small-cell scheme, and tenfold improvement when shadow fading is correlated. Expand
Unitary space-time modulation for multiple-antenna communications in Rayleigh flat fading
This work designs some multiple-antenna signal constellations and simulates their effectiveness as measured by bit-error probability with maximum-likelihood decoding and demonstrates that two antennas have a 6-dB diversity gain over one antenna at 15-dB SNR. Expand
Five disruptive technology directions for 5G
Five technologies that could lead to both architectural and component disruptive design changes: device-centric architectures, millimeter wave, massive MIMO, smarter devices, and native support for machine-to-machine communications are described. Expand
Capacity of a Mobile Multiple-Antenna Communication Link in Rayleigh Flat Fading
Analysis of a mobile wireless link comprising M transmitter and N receiver antennas operating in a Rayleigh flat-fading environment concludes that, for a fixed number of antennas, the capacity approaches the capacity obtained as if the receiver knew the propagation coefficients. Expand
Pilot Contamination and Precoding in Multi-Cell TDD Systems
The paper shows that the precoding matrix used by the base station in one cell becomes corrupted by the channel between that base station and the users in other cells in an undesirable manner and develops a new multi-cell MMSE-based precoding method that mitigates this problem. Expand
Systematic design of unitary space-time constellations
This paper proposes a systematic method for creating constellations of unitary space-time signals for multiple-antenna communication links and systematically produces the remaining signals by successively rotating this signal in a high-dimensional complex space. Expand