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Fifth-generation wireless systems are expected to employ multiple-antenna communication at millimeter wave (mmWave) frequencies using small cells within heterogeneous cellular networks. The high path loss of mmWave and the physical obstructions make communication challenging. To compensate for the severe path loss, mmWave systems may employ a beam alignment algorithm that facilitates highly directional...
The use of millimeter wave (mmWave) frequencies for access links promises to provide an incredible user experience given the large bandwidths available. Using a recently-developed mmWave indoor channel model for the lower E-band (71-76 GHz), we investigate the system-level performance of a mmWave system in a small office-type environment. Particular attention is paid to the performance with different...
With the ever increasing demands in higher data rate, there is a growing interest in exploiting the millimeter wave (mmWave) spectrum for future access communications. Aiming at characterizing the mmWave indoor propagation channel, a wideband measurement campaign using directional antennas has been conducted at 73 GHz in New York City in an office-type environment. In addition, ray-tracing using a...
There is growing interest in using millimeter wave (mmWave) frequencies for future access communications based on the enormous amount of available spectrum. To characterize the mmWave channel in urban areas, wideband propagation measurements at 73 GHz have recently been made in New York City. Using the measurements, a ray-tracing study has been conducted using databases for the same environments as...
Elevation spread of departure angles (ESD) is the key parameter characterizing a 3D fast-fading channel model. 3D channel modeling is currently being studied in 3GPP to enable the development of MIMO techniques exploiting both azimuth and elevation dimensions of the channel. In this paper we use ray-tracing techniques to estimate the ESD behavior in Manhattan and Copenhagen city environments and compare...
Millimeter wave (mmWave) frequencies offer the potential for very large capacity increases from traditional cellular frequencies because of the incredible amount of available spectrum (e.g., 10 GHz in the E-band alone). Additionally the latest channel measurements and research have shown that mmWave frequencies are useable for a 5G-type local area access system. However, employing mmWave frequencies...
A 2D antenna array introduces a new level of control and additional degrees of freedom in multiple-input-multiple-output (MIMO) systems particularly for the so-called “massive MIMO” systems. To accurately assess the performance gains of these large arrays, existing azimuth-only channel models have been extended to handle 3D channels by modeling both the elevation and azimuth dimensions. In this paper,...
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