201 citations · 1.2k across the 107 of their papers we have counts for
69 papers · 1 filter
On the Key Generation Rate of Physically Unclonable Functions
Yitao Chen, Muryong Kim, Sriram Vishwanath
In this paper, an algebraic binning based coding scheme and its associated achievable rate for key generation using physically unclonable functions (PUFs) is determined. This achie…
Approximate Capacity of a Class of Partially Connected Interference Channels
Muryong Kim, Yitao Chen, Sriram Vishwanath
We derive inner and outer bounds on the capacity region for a class of three-user partially connected interference channels. We focus on the impact of topology, interference alignm…
Entropic Causality and Greedy Minimum Entropy Coupling
Murat Kocaoglu, Alexandros G. Dimakis, Sriram Vishwanath +1
We study the problem of identifying the causal relationship between two discrete random variables from observational data. We recently proposed a novel framework called entropic ca…
Centralized Repair of Multiple Node Failures with Applications to Communication Efficient Secret Sharing
Ankit Singh Rawat, O. Ozan Koyluoglu, Sriram Vishwanath
This paper considers a distributed storage system, where multiple storage nodes can be reconstructed simultaneously at a centralized location. This centralized multi-node repair (C…
Progress on High-rate MSR Codes: Enabling Arbitrary Number of Helper Nodes
Ankit Singh Rawat, O. Ozan Koyluoglu, Sriram Vishwanath
This paper presents a construction for high-rate MDS codes that enable bandwidth-efficient repair of a single node. Such MDS codes are also referred to as the minimum storage regen…
Hierarchical Polar Coding for Achieving Secrecy over Fading Wiretap Channels without any Instantaneous CSI
Hongbo Si, O. Ozan Koyluoglu, Sriram Vishwanath
This paper presents a polar coding scheme to achieve secrecy in block fading binary symmetric wiretap channels without the knowledge of instantaneous channel state information (CSI…
A Perspective on Future Research Directions in Information Theory
Jeffrey G. Andrews, Alexandros Dimakis, Lara Dolecek +15
Information theory is rapidly approaching its 70th birthday. What are promising future directions for research in information theory? Where will information theory be having the mo…
Expansion Coding for Channel and Source Coding
Hongbo Si, O. Ozan Koyluoglu, Kumar Appaiah +1
A general method of coding over expansion is proposed,which allows one to reduce the highly non-trivial problems of coding over analog channels and compressing analog sources to a…
Cooperative Local Repair in Distributed Storage
Ankit Singh Rawat, Arya Mazumdar, Sriram Vishwanath
Erasure-correcting codes, that support local repair of codeword symbols, have attracted substantial attention recently for their application in distributed storage systems. This pa…
Haplotype Assembly: An Information Theoretic View
Hongbo Si, Haris Vikalo, Sriram Vishwanath
This paper studies the haplotype assembly problem from an information theoretic perspective. A haplotype is a sequence of nucleotide bases on a chromosome, often conveniently repre…
Locality and Availability in Distributed Storage
Ankit Singh Rawat, Dimitris S. Papailiopoulos, Alexandros G. Dimakis +1
This paper studies the problem of code symbol availability: a code symbol is said to have -availability if it can be reconstructed from disjoint groups of other symbols…
Linear Network Coding for Multiple Groupcast Sessions: An Interference Alignment Approach
Abhik Kumar Das, Siddhartha Banerjee, Sriram Vishwanath
We consider the problem of linear network coding over communication networks, representable by directed acyclic graphs, with multiple groupcast sessions: the network comprises of m…
Error-Correcting Regenerating and Locally Repairable Codes via Rank-Metric Codes
Natalia Silberstein, Ankit Singh Rawat, Sriram Vishwanath
This paper presents and analyzes a novel concatenated coding scheme for enabling error resilience in two distributed storage settings: one being storage using existing regenerating…
Polar Coding for Fading Channels: Binary and Exponential Channel Cases
Hongbo Si, O. Ozan Koyluoglu, Sriram Vishwanath
This work presents a polar coding scheme for fading channels, focusing primarily on fading binary symmetric and additive exponential noise channels. For fading binary symmetric cha…
Downlink Multi-Antenna Heterogeneous Cellular Network with Load Balancing
Abhishek K. Gupta, Harpreet S. Dhillon, Sriram Vishwanath +1
We model and analyze heterogeneous cellular networks with multiple antenna BSs (multi-antenna HetNets) with K classes or tiers of base stations (BSs), which may differ in terms of…
Lossy Compression of Exponential and Laplacian Sources using Expansion Coding
Hongbo Si, O. Ozan Koyluoglu, Sriram Vishwanath
A general method of source coding over expansion is proposed in this paper, which enables one to reduce the problem of compressing an analog (continuous-valued source) to a set of…
Precoding-Based Network Alignment For Three Unicast Sessions
Chun Meng, Abhik Kumar Das, Abinesh Ramakrishnan +3
We consider the problem of network coding across three unicast sessions over a directed acyclic graph, where each sender and the receiver is connected to the network via a single e…
Polar Coding for Fading Channels
Hongbo Si, O. Ozan Koyluoglu, Sriram Vishwanath
A polar coding scheme for fading channels is proposed in this paper. More specifically, the focus is Gaussian fading channel with a BPSK modulation technique, where the equivalent…
On Finite Alphabet Compressive Sensing
Abhik Kumar Das, Sriram Vishwanath
This paper considers the problem of compressive sensing over a finite alphabet, where the finite alphabet may be inherent to the nature of the data or a result of quantization. The…
Explicit MBR All-Symbol Locality Codes
Govinda M. Kamath, Natalia Silberstein, N. Prakash +5
Node failures are inevitable in distributed storage systems (DSS). To enable efficient repair when faced with such failures, two main techniques are known: Regenerating codes, i.e.…
Optimal Locally Repairable Codes via Rank-Metric Codes
Natalia Silberstein, Ankit Singh Rawat, O. Ozan Koyluoglu +1
This paper presents a new explicit construction for locally repairable codes (LRCs) for distributed storage systems which possess all-symbols locality and maximal possible minimum…
Optimal Locally Repairable and Secure Codes for Distributed Storage Systems
Ankit Singh Rawat, O. Ozan Koyluoglu, Natalia Silberstein +1
This paper aims to go beyond resilience into the study of security and local-repairability for distributed storage systems (DSS). Security and local-repairability are both importan…
Secure Cooperative Regenerating Codes for Distributed Storage Systems
O. Ozan Koyluoglu, Ankit Singh Rawat, Sriram Vishwanath
Regenerating codes enable trading off repair bandwidth for storage in distributed storage systems (DSS). Due to their distributed nature, these systems are intrinsically susceptibl…
On Locality in Distributed Storage Systems
Ankit Singh Rawat, Sriram Vishwanath
This paper studies the design of codes for distributed storage systems (DSS) that enable local repair in the event of node failure. This paper presents locally repairable codes bas…