Millimeter-Wave Cellular Wireless Networks: Potentials and Challenges
Sundeep Rangan,Theodore S. Rappaport,Elza Erkip +2 more
- Vol. 102, Iss: 3, pp 366-385
TLDR
Measurements and capacity studies are surveyed to assess mmW technology with a focus on small cell deployments in urban environments and it is shown that mmW systems can offer more than an order of magnitude increase in capacity over current state-of-the-art 4G cellular networks at current cell densities.Abstract:
Millimeter-wave (mmW) frequencies between 30 and 300 GHz are a new frontier for cellular communication that offers the promise of orders of magnitude greater bandwidths combined with further gains via beamforming and spatial multiplexing from multielement antenna arrays. This paper surveys measurements and capacity studies to assess this technology with a focus on small cell deployments in urban environments. The conclusions are extremely encouraging; measurements in New York City at 28 and 73 GHz demonstrate that, even in an urban canyon environment, significant non-line-of-sight (NLOS) outdoor, street-level coverage is possible up to approximately 200 m from a potential low-power microcell or picocell base station. In addition, based on statistical channel models from these measurements, it is shown that mmW systems can offer more than an order of magnitude increase in capacity over current state-of-the-art 4G cellular networks at current cell densities. Cellular systems, however, will need to be significantly redesigned to fully achieve these gains. Specifically, the requirement of highly directional and adaptive transmissions, directional isolation between links, and significant possibilities of outage have strong implications on multiple access, channel structure, synchronization, and receiver design. To address these challenges, the paper discusses how various technologies including adaptive beamforming, multihop relaying, heterogeneous network architectures, and carrier aggregation can be leveraged in the mmW context.read more
Citations
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Online Calibration for LTE-Based Antenna Array System
TL;DR: In this paper, the authors proposed a method that utilizes the Zadoff-Chu (Z-C) sequence of the Primary Synchronization Signal (PSS) and Sounding Reference Signal (SRS) that are available in every LTE data frame for downlink and uplink respectively, for estimating and compensating the differences in the impulse responses among the RF modules.
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Modeling and Analyzing Multi-Tier Millimeter/Micro Wave Hybrid Caching Networks
TL;DR: A comprehensive framework of mathematical models and analytical methods for multi-tier mmWave and μWave hybrid caching networks based on stochastic geometry is given and an association strategy by assuming average biased-received power association and Rayleigh fading is proposed.
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Impact of the Propagation Model on the Capacity in Small‐Cell Networks: Comparison Between the UHF/SHF and the Millimeter Wavebands
TL;DR: It is found that the signal‐to‐interference‐plus‐noise ratio, as estimated with the more realistic two‐slope model, is lower for devices that are within the break‐point of the transmitter, which is a small distance in the UHF/SHF band.
Proceedings ArticleDOI
A Closed-Form PS-DFT Codebook Design for mmWave Beam Alignment
TL;DR: Numerical results verify that the proposed closed-form phase-shifted discrete Fourier transformation (PS-DFT/CF) codebook design enables joint transceiver design for mmWave beam alignment.
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Enhancement in performance of DHTprecoding over WHT for EC companded OFDM in wireless networks
A. Lakshmi Narayana,B. Prasad,Prabhakara Rao Kapula,Dumpa Prasad,Asisa Kumar Panigrahy,D. N. V. S. L. S. Indira +5 more
TL;DR: In this paper, a hybrid methodology that combines exponential companding (EC), which is a non-linear companding technique with Discrete Hartley Transform (DHT), as well as Walsh Hadamard Transform (WHT), is proposed and investigated.
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