Cascaded Channel Estimation for Large Intelligent Metasurface Assisted Massive MIMO
Zhen-Qing He,Xiaojun Yuan +1 more
Reads0
Chats0
TLDR
A general framework for the estimation of the transmitter-LIM and LIM-receiver cascaded channel is introduced, and a two-stage algorithm that includes a sparse matrix factorization stage and a matrix completion stage is proposed that can achieve accurate channel estimation for LIM-assisted massive MIMO systems.Abstract:
In this letter, we consider the problem of channel estimation for large intelligent metasurface (LIM) assisted massive multiple-input multiple-output (MIMO) systems. The main challenge of this problem is that the LIM integrated with a large number of low-cost metamaterial antennas can only passively reflect the incident signals by certain phase shifts, and does not have any signal processing capability. To deal with this, we introduce a general framework for the estimation of the transmitter-LIM and LIM-receiver cascaded channel, and propose a two-stage algorithm that includes a sparse matrix factorization stage and a matrix completion stage. Simulation results illustrate that the proposed method can achieve accurate channel estimation for LIM-assisted massive MIMO systems.read more
Citations
More filters
Posted Content
Prospective Multiple Antenna Technologies for Beyond 5G
TL;DR: Three new multiple antenna technologies that can play key roles in beyond 5G networks: cell-free massive MIMO, beamspace massive M IMO, and intelligent reflecting surfaces are surveyed.
Journal ArticleDOI
Channel Estimation for RIS-Aided mmWave MIMO Systems via Atomic Norm Minimization
TL;DR: A two-stage channel estimation scheme for RIS-aided millimeter wave (mmWave) MIMO systems without a direct BS-MS channel is adopted, using atomic norm minimization to sequentially estimate the channel parameters, i.e., angular parameters, angle differences, and the products of propagation path gains.
Proceedings ArticleDOI
A Hardware Architecture For Reconfigurable Intelligent Surfaces with Minimal Active Elements for Explicit Channel Estimation
TL;DR: In this paper, the authors present an alternating optimization approach for explicit estimation of the channel gains at the RIS elements attached to the single RF chain, assuming sparse wireless channels in the beamspace domain.
Journal ArticleDOI
Passive Beamforming and Information Transfer Design for Reconfigurable Intelligent Surfaces Aided Multiuser MIMO Systems
TL;DR: In this paper, the authors investigated the passive beamforming and information transfer (PBIT) technique for multiuser multiple-input multiple-output (Mu-MIMO) systems with the aid of reconfigurable intelligent surfaces (RISs).
Posted Content
Channel Estimation and Passive Beamforming for Intelligent Reflecting Surface: Discrete Phase Shift and Progressive Refinement
TL;DR: An IRS-aided single-user communication system is considered and the IRS training reflection matrix for channel estimation as well as the passive beamforming for data transmission, both subject to the new constraint of discrete phase shifts are designed.
References
More filters
Journal ArticleDOI
A Singular Value Thresholding Algorithm for Matrix Completion
TL;DR: This paper develops a simple first-order and easy-to-implement algorithm that is extremely efficient at addressing problems in which the optimal solution has low rank, and develops a framework in which one can understand these algorithms in terms of well-known Lagrange multiplier algorithms.
Journal ArticleDOI
An introduction to millimeter-wave mobile broadband systems
Zhouyue Pi,Farooq Khan +1 more
TL;DR: This article introduces a millimeter-wave mobile broadband (MMB) system as a candidate next generation mobile communication system and demonstrates the feasibility for MMB to achieve gigabit-per-second data rates at a distance up to 1 km in an urban mobile environment.
Journal ArticleDOI
Online Learning for Matrix Factorization and Sparse Coding
TL;DR: In this paper, a new online optimization algorithm based on stochastic approximations is proposed to solve the large-scale matrix factorization problem, which scales up gracefully to large data sets with millions of training samples.
Journal ArticleDOI
Reconfigurable Intelligent Surfaces for Energy Efficiency in Wireless Communication
TL;DR: In this article, the authors developed energy-efficient designs for both the transmit power allocation and the phase shifts of the surface reflecting elements subject to individual link budget guarantees for the mobile users.
Journal ArticleDOI
A New Wireless Communication Paradigm through Software-Controlled Metasurfaces
Christos Liaskos,Shuai Nie,Ageliki Tsioliaridou,Andreas Pitsillides,Sotiris Ioannidis,Ian F. Akyildiz +5 more
TL;DR: This article proposes a radically different approach, enabling deterministic, programmable control over the behavior of wireless environments, using the so-called HyperSurface tile, a novel class of planar meta-materials that can interact with impinging electromagnetic waves in a controlled manner.
Related Papers (5)
Intelligent Reflecting Surface Enhanced Wireless Network via Joint Active and Passive Beamforming
Qingqing Wu,Rui Zhang +1 more
Towards Smart and Reconfigurable Environment: Intelligent Reflecting Surface Aided Wireless Network
Qingqing Wu,Rui Zhang +1 more