154 citations · 682 across the 36 of their papers we have counts for
14 papers · 1 filter
Low-Complexity Zero-Forcing Precoding for XL-MIMO Transmissions
Lucas N. Ribeiro, Stefan Schwarz, Martin Haardt
Deploying antenna arrays with an asymptotically large aperture will be central to achieving the theoretical gains of massive MIMO in beyond-5G systems. Such extra-large MIMO (XL-MI…
First-Order Perturbation Analysis of the SECSI Framework for the Approximate CP Decomposition of 3-D Noise-Corrupted Low-Rank Tensors
Sher Ali Cheema, Emilio Rafael Balda, Yao Cheng +3
The Semi-Algebraic framework for the approximate Canonical Polyadic (CP) decomposition via SImultaneaous matrix diagonalization (SECSI) is an efficient tool for the computation of…
Decoupled Signal Detection for the Uplink of Large-Scale MIMO Systems in Heterogeneous Networks
L. Arevalo, R. C. de Lamare, M. Haardt +1
Massive multiple-input multiple-output (MIMO) systems are strong candidates for future fifth generation (5G) heterogeneous cellular networks. For 5G, a network densification with a…
Performance analysis of multi-dimensional ESPRIT-type algorithms for arbitrary and strictly non-circular sources with spatial smoothing
Jens Steinwandt, Florian Roemer, Martin Haardt +1
Spatial smoothing is a widely used preprocessing scheme to improve the performance of high-resolution parameter estimation algorithms in case of coherent signals or if only a small…
Deterministic Cramer-Rao bound for strictly non-circular sources and analytical analysis of the achievable gains
Jens Steinwandt, Florian Roemer, Martin Haardt +1
Recently, several high-resolution parameter estimation algorithms have been developed to exploit the structure of strictly second-order (SO) non-circular (NC) signals. They achieve…
R-dimensional ESPRIT-type algorithms for strictly second-order non-circular sources and their performance analysis
Jens Steinwandt, Florian Roemer, Martin Haardt +1
High-resolution parameter estimation algorithms designed to exploit the prior knowledge about incident signals from strictly second-order (SO) non-circular (NC) sources allow for a…
Robust Adaptive Beamforming Algorithms Based on the Constrained Constant Modulus Criterion
L. Landau, R. C. de Lamare, M. Haardt
We present a robust adaptive beamforming algorithm based on the worst-case criterion and the constrained constant modulus approach, which exploits the constant modulus property of…
Low-Complexity Design of Generalized Block Diagonalization Precoding Algorithms for Multiuser MIMO Systems
K. Zu, R. C. de Lamare, M. Haardt
Block diagonalization (BD) based precoding techniques are well-known linear transmit strategies for multiuser MIMO (MU-MIMO) systems. By employing BD-type precoding algorithms at t…
Low-Complexity Lattice Reduction-Aided Channel Inversion Methods for Large-Dimensional Multi-User MIMO Systems
Keke Zu, Rodrigo C. de Lamare, Martin Haardt
Low-complexity precoding {algorithms} are proposed in this work to reduce the computational complexity and improve the performance of regularized block diagonalization (RBD) {based…
Frequency-Domain Group-based Shrinkage Estimators for UWB Systems
Sheng Li, Rodrigo C. de Lamare, Martin Haardt
In this work, we propose low-complexity adaptive biased estimation algorithms, called group-based shrinkage estimators (GSEs), for parameter estimation and interference suppression…
Sum-Rate Maximization with Minimum Power Consumption for MIMO DF Two-Way Relaying: Part I - Relay Optimization
Jie Gao, Sergiy A. Vorobyov, Hai Jiang +2
The problem of power allocation is studied for a multiple-input multiple-output (MIMO) decode-and-forward (DF) two-way relaying system consisting of two source nodes and one relay.…
Blind Adaptive Constrained Constant-Modulus Reduced-Rank Interference Suppression Algorithms Based on Interpolation, Switched Decimation and Filtering
Rodrigo C. de Lamare, Raimundo Sampaio-Neto, Martin Haardt
This work proposes a blind adaptive reduced-rank scheme and constrained constant-modulus (CCM) adaptive algorithms for interference suppression in wireless communications systems.…
Sum-Rate Maximization with Minimum Power Consumption for MIMO DF Two-Way Relaying: Part II - Network Optimization
Jie Gao, Sergiy A. Vorobyov, Hai Jiang +2
In Part II of this two-part paper, a sum-rate-maximizing power allocation with minimum power consumption is found for multiple-input multiple-output (MIMO) decode-and-forward (DF)…
Sum-Rate Maximization in Two-Way AF MIMO Relaying: Polynomial Time Solutions to a Class of DC Programming Problems
Arash Khabbazibasmenj, Florian Roemer, Sergiy A. Vorobyov +1
Sum-rate maximization in two-way amplify-and-forward (AF) multiple-input multiple-output (MIMO) relaying belongs to the class of difference-of-convex functions (DC) programming pro…