Grant-free access via bilinear inference for cell-free MIMO with low-coherence pilots

H Iimori, T Takahashi, K Ishibashi… - IEEE Transactions …, 2021 - ieeexplore.ieee.org
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 …

Active device detection and performance analysis of massive non-orthogonal transmissions in cellular internet of things

D Cai, P Fan, Q Zou, Y Xu, Z Ding, Z Liu - Science China information …, 2022 - Springer
This paper investigates multiple access schemes for uplink and downlink transmissions in
cellular networks with massive Internet of Things (IoT) devices. Recall that single-carrier …

Fundamental limits of many-user MAC with finite payloads and fading

SS Kowshik, Y Polyanskiy - IEEE Transactions on Information …, 2021 - ieeexplore.ieee.org
Consider a (multiple-access) wireless communication system where users are connected to
a unique base station over a shared-spectrum radio links. Each user has a fixed number k of …

A concise tutorial on approximate message passing

Q Zou, H Yang - arXiv preprint arXiv:2201.07487, 2022 - arxiv.org
High-dimensional signal recovery of standard linear regression is a key challenge in many
engineering fields, such as, communications, compressed sensing, and image processing …

A low-complexity joint user activity, channel and data estimation for grant-free massive MIMO systems

Q Zou, H Zhang, D Cai, H Yang - IEEE Signal Processing …, 2020 - ieeexplore.ieee.org
This letter considers a joint user activity, channel and data estimation problem in an uplink
grant-free massive MIMO systems with low-precision analog-to-digital converters (ADCs) …

Message passing based joint channel and user activity estimation for uplink grant-free massive MIMO systems with low-precision ADCs

Q Zou, H Zhang, D Cai, H Yang - IEEE Signal Processing …, 2020 - ieeexplore.ieee.org
This letter considers the problem of a joint estimation for channel fading and user activity in
an uplink grant-free massive MIMO system equipped with low-precision analog-to-digital …

An improved expectation propagation based detection scheme for MIMO systems

G Yao, H Chen, J Hu - IEEE Transactions on Communications, 2021 - ieeexplore.ieee.org
Multiple-input Multiple-output (MIMO) technologies play an important role in modern and
future wireless communication systems as they can improve the capacity without increasing …

High-Dimensional Multiple-Measurement-Vector Problem: Mutual Information and Message Passing

Q Zou, H Zhang - IEEE Transactions on Signal Processing, 2023 - ieeexplore.ieee.org
In this paper, we study the high-dimensional multiple-measurement-vector (MMV) problem,
which typically arises in massive machine-type communications (mMTC) that operates with …

Low-complexity large MIMO detection via layered belief propagation in beam domain

T Takahashi, A Tölli, S Ibi… - IEEE Transactions on …, 2021 - ieeexplore.ieee.org
In large multi-user multi-input multi-output systems, the computational cost and circuit scale
of base stations (BSs) are effectively reduced using two-stage signal processing consisting …

Bilinear adaptive generalized vector approximate message passing

X Meng, J Zhu - IEEE Access, 2018 - ieeexplore.ieee.org
This paper considers the generalized bilinear recovery problem, which aims to jointly
recover the vector b and the matrix X from componentwise nonlinear measurements, where …