This article focuses on conceiving a random access (RA) protocol able to provide
connections for a vast number of devices subject to intensive collisions in an extralarge …

The expectation propagation (EP) algorithm is near-optimal in massive multiple-input
multiple-output (MIMO) systems but suffers from high computation complexity. Most of the …

We consider a massive MIMO system where the array at the access point reaches a
dimension that is much larger than the array in current systems. Transitioning to an …

Expectation propagation (EP) is an approximate Bayesian inference (ABI) method which has
seen widespread use across machine learning and statistics, owing to its accuracy and …

Massive multiple-input multiple-output (M-MIMO) is a key technology for 5G networks which
consists on equipping the base station (BS) with hundreds or thousands of antennas …

Most wireless communication systems operate in the far-field region of antennas and
antenna arrays, where waves are planar and beams have infinite depth. When antenna …

Massive multiple-input-multiple-output (M-MIMO) is a key technology for 5G networks. Within
this research area, new types of deployment are arising, such as the extremely-large regime …

The main requirements for 5G and beyond connectivity include a uniform high quality of
service, which can be attained in crowded scenarios by extra-large MIMO (XL-MIMO) …

Expectation propagation (EP) has recently been considered with iterative detection and
decoding (IDD) to enhance the bit error rate (BER) performance for coded massive Multiple …

We estimate the uplink channel of an extra large-scale multiple-input-multiple-output (XL-
MIMO) system, with the base station (BS) consisting of multiple antenna sub-arrays. The BS …