In this paper, we study the problem of user activity detection and large-scale fading coefficient estimation in a random access wireless uplink with a massive MIMO base station …
Multiple access (MA) is a crucial part of any wireless system and refers to techniques that make use of the resource dimensions to serve multiple users/devices/machines/services …
A Munari - IEEE Transactions on Communications, 2021 - ieeexplore.ieee.org
Age of information (AoI) is gaining attention as a valuable performance metric for many IoT systems, in which a large number of devices report time-stamped updates to a central …
A Fengler, P Jung, G Caire - IEEE Transactions on Information …, 2021 - ieeexplore.ieee.org
Unsourced random-access (U-RA) is a type of grant-free random access with a virtually unlimited number of users, of which only a certain number K a are active on the same time …
A Fengler, O Musa, P Jung… - IEEE Journal on Selected …, 2022 - ieeexplore.ieee.org
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 …
Sparse regression codes with approximate message passing (AMP) decoding have gained much attention in recent times. The concepts underlying this coding scheme extend to …
Extra large MIMO (XL-MIMO) systems are subject to spatial non-stationarity forming visibility regions (VRs), which leads to a sub-array-wise sparse structure of the channel matrix. When …
T Li, Y Wu, M Zheng, W Zhang, C Xing… - IEEE Journal on …, 2022 - ieeexplore.ieee.org
In this paper, we investigate a joint device activity detection (DAD), channel estimation (CE), and data decoding (DD) algorithm for multiple-input multiple-output (MIMO) massive …
This article considers the massive MIMO unsourced random access problem on a quasi- static Rayleigh fading channel. Given a fixed message length and a prescribed number of …