3 citations · 9 across the 10 of their papers we have counts for
9 papers · 1 filter
Secret Sharing for Secure and Private Information Retrieval: A Construction Using Algebraic Geometry Codes
Okko Makkonen, David Karpuk, Camilla Hollanti
Private information retrieval (PIR) considers the problem of retrieving a data item from a database or distributed storage system without disclosing any information about which dat…
Degrees of Freedom and Secrecy in Wireless Relay Networks
Arsenia Chorti, Ragnar Freij, David Karpuk
We translate the problem of designing a secure communications protocol for several users communicating through a relay in a wireless network into understanding certain subvarieties…
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…
Probability Estimates for Fading and Wiretap Channels from Ideal Class Zeta Functions
David Karpuk, Anne-Maria Ernvall-Hytönen, Camilla Hollanti +1
In this paper, new probability estimates are derived for ideal lattice codes from totally real number fields using ideal class Dedekind zeta functions. In contrast to previous work…
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…
Multi-Dimensional and Non-Uniform Constellation Optimization via the Special Orthogonal Group
David Karpuk, Camilla Hollanti
With the goal of optimizing the CM capacity of a finite constellation over a Rayleigh fading channel, we construct for all dimensions which are a power of 2 families of rotation ma…