no code implementations • 13 Apr 2023 • Sepideh Gherekhloo, Khaled Ardah, Martin Haardt
A novel channel estimation method called Sequential Alternating Least Squares Approximation (SALSA) is proposed by exploiting a hidden tensor structure in the uplink measurement matrix.
no code implementations • 19 Sep 2021 • Khaled Ardah, Sepideh Gherekhloo, André L. F. de Almeida, Martin Haardt
Reconfigurable intelligent surfaces (RISs) have been proposed recently as new technology to tune the wireless propagation channels in real-time.
no code implementations • 29 Jul 2021 • Sepideh Gherekhloo, Khaled Ardah, André L. F. de Almeida, Martin Haardt
Utilizing such a structure, a tensor-based RIS channel estimation method (termed TenRICE) is proposed, wherein the tensor factor matrices are estimated using an alternating least squares method.
no code implementations • 20 May 2021 • Sepideh Gherekhloo, Khaled Ardah, Martin Haardt
In this work, we consider the design of hybrid analog-digital (HAD) multi-carrier MIMO-OFDM two-way relaying systems, where the relay station is equipped with a HAD amplify-and-forward architecture and every mobile station is equipped with a fully-digital beamforming architecture.
