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 …

This study investigates the application potential of the SAGE (space-alternating generalized
expectation-maximization) algorithm to jointly estimate the relative delay, incidence azimuth …

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 …

This paper links the direct-sequence code-division multiple access (DS-CDMA) multiuser
separation-equalization-detection problem to the parallel factor (PARAFAC) model, which is …

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 …

The two key limiting factors facing wireless systems today are multipath interference and
multiuser interference. In this context, a challenging signal processing problem is the joint …

A multiple signal classification (MUSIC)-based approach known as the time-space-time
MUSIC (TST-MUSIC) is proposed to jointly estimate the directions of arrival (DOAs) and the …

Accurate localization in harsh indoor environments has long been a challenging problem
due to the presence of multipath. Since joint direction-of-arrival (DOA) and time delay (TD) …