703 research outputs found
Design of a Planar Eleven Antenna for Optimal MIMO Performance as a Wideband Micro Base-station Antenna
A new low-profile planar Eleven antenna is designed for optimal MIMO
performance as a wideband MIMO antenna for micro base-stations in future
wireless communication systems. The design objective has been to optimize both
the reflection coefficient at the input port of the antenna and the 1-bitstream
and 2-bitstream MIMO efficiency of the antenna at the same time, in both the
Rich Isotropic MultiPath (RIMP) and Random Line-of-Sight (Random-LOS)
environments. The planar Eleven antenna can be operated in 2-, 4-, and 8-port
modes with slight modifications. The optimization is performed using genetic
algorithms. The effects of polarization deficiencies and antenna total embedded
efficiency on the MIMO performance of the antenna are further studied. A
prototype of the antenna has been fabricated and the design has been verified
by measurements against the simulations.Comment: 7 pages, 15 figures, 15 reference
From Le Corubusier's boîte to Villanueva's cube: the pavilion of Venezuela, in Montreal
Peer Reviewe
Stochastic Phased Array Performance Indicators for Quality-of-Service-Enhanced Massive MIMO
In this paper, we show that the signal-to-interference-plus-noise ratio
(SINR) at a base station (BS) equipped with an arbitrary physical array antenna
can be expressed as a function of two fundamental figures-of-merit (FoMs): (I)
the instantaneous effective gain (IEG), and (II) the beamforming-channel
correlation (BCC). These two FoMs are functions of the array antenna layout,
the antenna elements, the propagation channel and the applied signal processing
algorithms, and hence they are random variables (RVs) in general. We illustrate
that both FoMs provide essential insights for quality-of-service (QoS)-based
phased array design by investigating their statistics for BSs applying
full-digital (FD) zero forcing (ZF) beamforming. We evaluate various array
designs and show that arrays with higher IEGs and a reduced probability of low
BCCs can increase the ergodic sum rate and reduce the need for scheduling
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