Journal ArticleDOI
Noncooperative Cellular Wireless with Unlimited Numbers of Base Station Antennas
TLDR
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
URLLC With Massive MIMO: Analysis and Design at Finite Blocklength
TL;DR: It is proved that, with minimum mean-square error (MMSE) processing and spatially correlated channels, the error probability at finite blocklength goes to zero as the number of antennas grows to infinity, even under pilot contamination.
Posted Content
Outage Probability of Dual-Hop Multiple Antenna AF Systems with Linear Processing in the Presence of Co-Channel Interference
TL;DR: This paper considers a dual-hop amplify-and-forward (AF) relaying system where the relay is equipped with multiple antennas, while the source and the destination are equipped with a single antenna and proposes three heuristic relay precoding schemes to combat the CCI.
Posted Content
Interference Reduction in Multi-Cell Massive MIMO Systems I: Large-Scale Fading Precoding and Decoding
TL;DR: This work devise a new concept that leads to the effective elimination of inter-cell interference in massive MIMO systems with Large-Scale Fading Precoding (LSFP), which is achieved by outer multi-cellular precoding, which is called LSFP.
Proceedings ArticleDOI
Hardware Efficient Approximative Matrix Inversion for Linear Pre-Coding in Massive MIMO
TL;DR: In this article, a hardware efficient linear precoder for massive MIMO base stations (BSs) comprising a very large number of antennas, in the order of 100s, serving multiple users simultaneously is presented.
Proceedings ArticleDOI
HetNets and Massive MIMO: Modeling, Potential Gains, and Performance Analysis
TL;DR: The results suggest that significant throughput improvement can be achieved by exploiting interference nulling and implicit coordination across the tiers due to flexible and asymmetric TDD operation.
References
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