We consider the unsourced random access problem on a Rayleigh block-fading AWGN
channel with multiple receive antennas. Specifically, we treat the slow fading scenario …

Device activity detection in the emerging cell-free massive multiple-input multiple-output
(MIMO) systems has been recognized as a crucial task in machine-type communications, in …

In the uplink machine-type communication (MTC) system, a combination of grant-free
transmission and non-orthogonal multiple access (NOMA) emerges to reduce the control …

This paper investigates the unsourced random access (URA) scheme to accommodate
numerous machine-type users communicating to a base station equipped with multiple …

Grant-free random access is a promising mechanism to support modern massive machine-
type communications in which devices are sporadically active with small payloads. Under …

In this letter, we study the joint device activity and delay detection problem in asynchronous
massive machine-type communications (mMTC), where all active devices asynchronously …

The core requirement of massive Machine-Type Communication (mMTC) is to support
reliable and fast access for an enormous number of machine-type devices (MTDs). In many …

We present two model-based neural network architectures purposed for sporadic user
detection and channel estimation in massive machine-type communications. In the scenario …

We investigate the activity detection and channel estimation issues for cell-free Internet of
Things (IoT) networks with massive random access. In each time slot, only partial devices …

In this paper, we study how to efficiently and reliably detect active devices and estimate their
channels in a multiple-input multiple-output orthogonal frequency-division multiplexing …