Non-Bayesian activity detection, large-scale fading coefficient estimation, and unsourced random access with a massive MIMO receiver
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 …
coefficient estimation in a random access wireless uplink with a massive MIMO base station …
Clustering-based activity detection algorithms for grant-free random access in cell-free massive MIMO
UK Ganesan, E Björnson… - IEEE Transactions on …, 2021 - ieeexplore.ieee.org
Future wireless networks need to support massive machine type communication (mMTC)
where a massive number of devices accesses the network and massive MIMO is a …
where a massive number of devices accesses the network and massive MIMO is a …
Tensor-based modulation for unsourced massive random access
We introduce a modulation for unsourced massive random access whereby the transmitted
symbols are rank-1 tensors constructed from Grassmannian sub-constellations. The use of a …
symbols are rank-1 tensors constructed from Grassmannian sub-constellations. The use of a …
Joint activity and channel estimation for extra-large MIMO systems
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 …
regions (VRs), which leads to a sub-array-wise sparse structure of the channel matrix. When …
Massive unsourced random access: Exploiting angular domain sparsity
X Xie, Y Wu, J An, J Gao, W Zhang… - IEEE transactions on …, 2022 - ieeexplore.ieee.org
This paper investigates the unsourced random access (URA) scheme to accommodate
numerous machine-type users communicating to a base station equipped with multiple …
numerous machine-type users communicating to a base station equipped with multiple …
Grant-free access via bilinear inference for cell-free MIMO with low-coherence pilots
We propose a novel joint activity, channel and data estimation (JACDE) scheme for multiple-
input multiple-output (MIMO) systems. The contribution aims to allow significant overhead …
input multiple-output (MIMO) systems. The contribution aims to allow significant overhead …
Interference cancellation algorithms for grant-free multiple access with massive MIMO
In next generation Internet-of-Things, the overhead introduced by grant-based multiple
access protocols may engulf the access network as a consequence of the unprecedented …
access protocols may engulf the access network as a consequence of the unprecedented …
Exploiting tensor-based Bayesian learning for massive grant-free random access in LEO satellite Internet of Things
With the rapid development of Internet of Things (IoT), low earth orbit (LEO) satellite IoT is
expected to provide low power, massive connectivity and wide coverage IoT applications. In …
expected to provide low power, massive connectivity and wide coverage IoT applications. In …
Unsourced multiple access based on sparse tanner graph—Efficient decoding, analysis, and optimization
J Liu, X Wang - IEEE Journal on Selected Areas in …, 2022 - ieeexplore.ieee.org
We propose novel sparse-graph-based transmission schemes and receiver algorithms for
unsourced multiple access (UMA) in MIMO channels. The channel coherence interval is …
unsourced multiple access (UMA) in MIMO channels. The channel coherence interval is …
Direct-to-satellite IoT slotted aloha systems with multiple satellites and unequal erasure probabilities
Direct-to-satellite Internet of Things (IoT) solutions have attracted a lot of attention from
industry and academia recently, as promising alternatives for large scale coverage of a …
industry and academia recently, as promising alternatives for large scale coverage of a …