In the past ten years, there have been tremendous research progresses on massive MIMO
systems, most of which stand from the communications viewpoint. A new trend to investigate …

This paper presents the design and implementation of SpotFi, an accurate indoor
localization system that can be deployed on commodity WiFi infrastructure. SpotFi only uses …

In order to estimate the signal parameters accurately for mobile systems, it is necessary to
estimate a system's propagation characteristics through a medium. Propagation analysis …

The availability of position information is of great importance in many commercial, public
safety, and military applications. The coming years will see the emergence of location-aware …

Space-time processing can improve network capacity, coverage, and quality by reducing co-
channel interference (CCI) while enhancing diversity and array gain. This article focuses …

Deterministic blind beamforming algorithms try to separate superpositions of source signals
im**ing on a phased antenna array by using the deterministic properties of the signals or …

The ubiquity, large bandwidth, and spatial diversity of the fifth-generation (5G) cellular signal
render it a promising candidate for accurate positioning in indoor environments where the …

In a multipath communication scenario, it is often relevant to estimate the directions and
relative delays of each multipath ray. We derive a closed-form subspace-based method for …

In a parametric multipath propagation model, a source is received by an antenna array via a
number of rays, each described by an arrival angle, a delay, and a fading parameter. Unlike …

This paper addresses the problem of determining the unknown position of a mobile station
for a mmWave multiple-input single-output (MISO) system. This setup is motivated by the fact …