Uplink to downlink channel covariance transformation in FDD systems

S Bameri, KA Almahrog, RH Gohary… - IEEE Transactions …, 2023 - ieeexplore.ieee.org
This paper considers frequency division duplexing massive multiple-input multiple-output
systems in which the base station (BS) is equipped with either a uniform linear antenna …

Channel covariance conversion and modelling using infinite dimensional Hilbert spaces

L Miretti, RLG Cavalcante… - IEEE Transactions on …, 2021 - ieeexplore.ieee.org
This study considers the channel covariance conversion problem, which consists in
estimating the spatial covariance matrix of a wireless channel by exploiting measurements …

Uplink-downlink channel covariance transformations and precoding design for FDD massive MIMO

MB Khalilsarai, Y Song, T Yang… - 2019 53rd Asilomar …, 2019 - ieeexplore.ieee.org
A large majority of cellular networks deployed today make use of Frequency Division
Duplexing (FDD) where, in contrast with Time Division Duplexing (TDD), the channel …

Robust Estimation of Angular Power Spectrum in Massive MIMO Under Covariance Estimation Errors: Learning Centers and Scales of Gaussians

N Kaneko, M Yukawa… - 2024 IEEE 25th …, 2024 - ieeexplore.ieee.org
This paper addresses the problem of the angular power spectrum (APS) estimation in
massive multiple-input multiple-output (MIMO) systems. Estimating the APS is crucial, eg, for …

Adaptive Estimation of Angular Power Spectra for Time-Varying MIMO Channels

N Agrawal, RLG Cavalcante… - 2021 IEEE 22nd …, 2021 - ieeexplore.ieee.org
This paper addresses the problem of estimating and tracking the angular power spectrum
(APS) of MIMO channels. The APS displays properties such as invariance over a wide range …

Channel covariance estimation in multiuser massive mimo systems with an approach based on infinite dimensional hilbert spaces

RLG Cavalcante, S Stańczak - ICASSP 2020-2020 IEEE …, 2020 - ieeexplore.ieee.org
We propose a novel algorithm to estimate the channel covariance matrix of a desired user in
multiuser massive MIMO systems. The algorithm uses only knowledge of the array response …

Long‐term Perspectives: Machine Learning for Future Wireless Networks

S Stańczak, A Keller, RLG Cavalcante… - Shaping Future 6G …, 2021 - Wiley Online Library
Mobile communications resources (spectrum and energy) are scarce. In addition, signals in
the real world are distorted by noise and interference while the statistics of wireless …

Hybrid data and model driven algorithms for angular power spectrum estimation

RLG Cavalcante, S Stańczak - GLOBECOM 2020-2020 IEEE …, 2020 - ieeexplore.ieee.org
We propose two algorithms that use both models and datasets to estimate angular power
spectra from channel covariance matrices in massive MIMO systems. The first algorithm is …

Estimation of Angular Power Spectrum Using Multikernel Adaptive Filtering

E Ninomiya, M Yukawa… - 2022 Asia-Pacific …, 2022 - ieeexplore.ieee.org
This paper addresses the problem of estimating the angular power spectrum (APS) of
massive multiple input multiple output wireless channels. Estimating the APS is useful, for …

[PDF][PDF] Machine Learning for RAN: Delusion or Salvation?

S Stanczak - itu.int
The Convergence of AI & Communications Page 1 Machine Learning for RAN: Delusion or
Salvation? Slawomir Stanczak Page 2 Why ML for Communications (=MLC)? • Entry points for …