5 citations · 14 across the 13 of their papers we have counts for
14 papers
On Fast-Decodable Algebraic Space--Time Codes
Amaro Barreal, Camilla Hollanti
In the near future, the generation (5G) wireless systems will be established. They will consist of an integration of different techniques, including distributed antenna sy…
Natural orders for asymmetric space--time coding: minimizing the discriminant
Amaro Barreal, Capi Corrales Rodrigáñez, Camilla Hollanti
Algebraic space--time coding --- a powerful technique developed in the context of multiple-input multiple-output (MIMO) wireless communications --- has profited tremendously from t…
Well-Rounded Lattices for Coset Coding in MIMO Wiretap Channels
Oliver W. Gnilke, Amaro Barreal, Alex Karrila +3
The concept of well-rounded lattices has recently found important applications in the setting of a fading single-input single-output (SISO) wiretap channel. It has been shown that,…
Information Bounds and Flatness Factor Approximation for Fading Wiretap MIMO Channels
Amaro Barreal, Alex Karrila, David Karpuk +1
In this article, the design of secure lattice coset codes for general wireless channels with fading and Gaussian noise is studied. Recalling the eavesdropper's probability and info…
Coded Caching Clusters with Device-to-Device Communications
Joonas Pääkkönen, Amaro Barreal, Camilla Hollanti +1
We consider a geographically constrained caching community where popular data files are cached on mobile terminals and distributed through Device-to-Device (D2D) communications. Fu…
Nested Lattice Codes for Vector Perturbation Systems
David A. Karpuk, Amaro Barreal, Oliver W. Gnilke +1
Vector perturbation is an encoding method for broadcast channels in which the transmitter solves a shortest vector problem in a lattice to create a perturbation vector, which is th…
An Approximation of Theta Functions with Applications to Communications
Amaro Barreal, Mohamed Taoufiq Damir, Ragnar Freij-Hollanti +1
Computing the theta series of an arbitrary lattice, and more specifically a related quantity known as the flatness factor, has been recently shown to be important for lattice code…
Constructions of Fast-Decodable Distributed Space-Time Codes
Amaro Barreal, Camilla Hollanti, Nadya Markin
Fast-decodable distributed space-time codes are constructed by adapting the iterative code construction introduced in [1] to the N -relay multiple-input multiple-output channel, le…
A Low-Complexity Message Recovery Method for Compute-and-Forward Relaying
Amaro Barreal, Joonas Pääkkönen, David Karpuk +2
The Compute-and-Forward relaying strategy achieves high computation rates by decoding linear combinations of transmitted messages at intermediate relays. However, if the involved r…
Reduced Complexity Decoding of n x n Algebraic Space-Time Codes
Amaro Barreal, Camilla Hollanti, David Karpuk
Algebraic space-time coding allows for reliable data exchange across fading multiple-input multiple-output channels. A powerful technique for decoding space-time codes in Maximum-L…
Fast-Decodable Space-Time Codes for the -Relay and Multiple-Access MIMO Channel
Amaro Barreal, Camilla Hollanti, Nadya Markin
In this article, the first general constructions of fast-decodable, more specifically (conditionally) -group decodable, space-time block codes for the Nonorthogonal Amplify and…
Node Repair for Distributed Storage Systems over Fading Channels
David Karpuk, Camilla Hollanti, Amaro Barreal
Distributed storage systems and associated storage codes can efficiently store a large amount of data while ensuring that data is retrievable in case of node failure. The study of…
Algebraic Codes and a New Physical Layer Transmission Protocol for Wireless Distributed Storage Systems
Amaro Barreal, Camilla Hollanti, David Karpuk +1
In a wireless storage system, having to communicate over a fading channel makes repair transmissions prone to physical layer errors. The first approach to combat fading is to utili…
Space-Time Storage Codes for Wireless Distributed Storage Systems
Camilla Hollanti, David Karpuk, Amaro Barreal +1
Distributed storage systems (DSSs) have gained a lot of interest recently, thanks to their robustness and scalability compared to single-device storage. Majority of the related res…