Journal ArticleDOI
Noncooperative Cellular Wireless with Unlimited Numbers of Base Station Antennas
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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.Abstract:
A cellular base station serves a multiplicity of single-antenna terminals over the same time-frequency interval. Time-division duplex operation combined with reverse-link pilots enables the base station to estimate the reciprocal forward- and reverse-link channels. The conjugate-transpose of the channel estimates are used as a linear precoder and combiner respectively on the forward and reverse links. Propagation, unknown to both terminals and base station, comprises fast fading, log-normal shadow fading, and geometric attenuation. In the limit of an infinite number of antennas a complete multi-cellular analysis, which accounts for inter-cellular interference and the overhead and errors associated with channel-state information, yields a number of mathematically exact conclusions and points to a desirable direction towards which cellular wireless could evolve. In particular the effects of uncorrelated noise and fast fading vanish, throughput and the number of terminals are independent of the size of the cells, spectral efficiency is independent of bandwidth, and the required transmitted energy per bit vanishes. The only remaining impairment is inter-cellular interference caused by re-use of the pilot sequences in other cells (pilot contamination) which does not vanish with unlimited number of antennas.read more
Citations
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Journal ArticleDOI
Joint Beamforming and Broadcasting in Massive MIMO
Erik G. Larsson,H. Vincent Poor +1 more
TL;DR: JBB can substantially outperform OA in terms of required total radiated power for given rate targets and is compared to orthogonal access (OA) by which the base station partitions the time-frequency resources into two disjunct parts.
Journal ArticleDOI
Massive MIMO for Industrial Internet of Things in Cyber-Physical Systems
Byung Moo Lee,Hong Yang +1 more
TL;DR: The feasibility of utilizing massive multiple-input multiple-output (MIMO) as a wireless technology for industrial internet applications of CPS is investigated and the performance of a massive MIMO base station deployed at a data center to provide massive connectivity to a large number of devices is analyzed.
Journal ArticleDOI
Throughput Analysis of Massive MIMO Uplink with Low-Resolution ADCs
TL;DR: In this paper, the uplink throughput achievable by a multiple-user (MU) massive MIMO system in which the base station is equipped with a large number of low-resolution analog-to-digital converters was investigated.
Posted Content
User-centric Cell-free Massive MIMO Networks: A Survey of Opportunities, Challenges and Solutions.
TL;DR: In this article, the authors present a guide to the key challenges facing the deployment of this network scheme and contemplate the solutions being proposed for the main bottlenecks facing cell-free communications.
Proceedings ArticleDOI
Beamspace MU-MIMO for high-density gigabit small cell access at millimeter-wave frequencies
John Brady,Akbar M. Sayeed +1 more
TL;DR: This paper applies B-MIMO theory to develop a framework for analyzing the small cell in terms of the orthogonal beam footprints and demonstrates that the low-complexity transceivers enable 1000s of Gigabit/s aggregate rates in mm-wave small cells serving hundreds of MSs.
References
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Journal ArticleDOI
Duality, achievable rates, and sum-rate capacity of Gaussian MIMO broadcast channels
TL;DR: It is shown that the dirty paper achievable region achieves the sum-rate capacity of the MIMO BC by establishing that the maximum sum rate of this region equals an upper bound on the sum rate.