no code implementations • 23 Aug 2023 • Josef A. Nossek, Dominik Semmler, Michael Joham, Wolfgang Utschick
The vast majority of research publications on RIS are focussing on system-level optimization and are based on very simplistic models ignoring basic physical laws.
no code implementations • 19 May 2021 • Jonas Kornprobst, Thomas J. Mittermaier, Raimund A. M. Mauermayer, Gerhard F. Hamberger, Matthias G. Ehrnsperger, Bernhard Lehmeyer, Michel T. Ivrlac, Ulrik Imberg, Thomas F. Eibert, Josef A. Nossek
Two novel decoupling and matching networks (DMNs) in microstrip technology for three-element uniform circular arrays (UCAs) are investigated and compared to a more conventional DMN approach with simple neutralization lines.
no code implementations • 13 Jul 2020 • Fazal-E-Asim, Felix Antreich, Charles C. Cavalcante, André L. F. de Almeida, Josef A. Nossek
We propose a novel two-stage algorithm for channel parameters estimation.
no code implementations • 15 May 2020 • Shilpa Rao, Gonzalo Seco-Granados, Hessam Pirzadeh, Josef A. Nossek, A. Lee Swindlehurst
We consider channel estimation for an uplink massive multiple-input multiple-output (MIMO) system where the base station (BS) uses an array with low-resolution (1-2 bit) analog-to-digital converters and a spatial Sigma-Delta ($\Sigma\Delta$) architecture to shape the quantization noise away from users in some angular sector.
no code implementations • 8 Jan 2020 • Fazal-E-Asim, André L. F. de Almeida, Martin Haardt, Charles C. Cavalcante, Josef A. Nossek
To achieve a reliable communication with short data blocks, we propose a novel decoding strategy for Kronecker-structured constant modulus signals that provides low bit error ratios (BERs) especially in the low energy per bit to noise power spectral density ratio $(E_b/N_0)$.