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Suhas Diggavi

Cette personne n’est plus à l’EPFL

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Publications associées (77)

On degraded two-message set broadcast

Suhas Diggavi, Christina Fragouli, Shirin Saeedi Bidokhti, Vinod Malathidevi Prabhakaran

We consider the two message set problem, where a source broadcasts a common message W1 to an arbitrary set of receivers U and a private message W2 to a subset of the receivers P ⊆U . Transmissions occur over linear deterministic channels. For the case wher ...

2009

A Deterministic Approach to Wireless Network Error Correction

Suhas Diggavi, Soheil Mohajerzefreh

In this paper we consider communication between two special nodes ("source" and "destination") in a wireless relay network, which has malfunctioning or malicious nodes (inserting errors). We develop the model for wireless network communication in the prese ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2009

Embedded Rank Distance Codes for ISI channels

Sanket Dusad, Suhas Diggavi

Designs for transmit alphabet constrained space-time codes naturally lead to questions about the design of rank distance codes. Recently, diversity embedded multi-level space-time codes for flat fading channels have been designed from sets of binary matric ...

2008

Diversity Embedded Space-Time Codes

Sanket Dusad, Suhas Diggavi

Rate and diversity impose a fundamental trade-off in wireless communication. High-rate space-time codes come at a cost of lower reliability (diversity), and high reliability (diversity) implies a lower rate. However, wireless networks need to support appli ...

2008

Hierarchical Routing over Dynamic Wireless Networks

Dominique Florian Tschopp, Matthias Grossglauser, Suhas Diggavi

2008

Introduction to the Issue on MIMO-Optimized Transmission Systems for Delivering Data and Rich Content

Suhas Diggavi

2008

Routing in mobile wireless networks

Dominique Florian Tschopp, Matthias Grossglauser, Suhas Diggavi

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2008

Transmission techniques for relay-interference networks

Suhas Diggavi, Christina Fragouli, Soheil Mohajerzefreh

In this paper we study the relay-interference wireless network, in which relay (helper) nodes are to facilitate competing information ﬂows over a wireless network. We examine this in the context of a deterministic wireless interaction model, which eliminat ...

2008

On Locating Byzantine Attackers

Suhas Diggavi, Christina Fragouli, Mahdi Jafari Siavoshani

We examine networks that employ network coding, and are subject to Byzantine attacks. We consider systems where an appropriate network error correcting scheme is employed that is able to correct (up to a certain number of) Byzantine errors. Given this setu ...

2008

Multiuser successive refinement and multiple description coding

Suhas Diggavi, Jun Chen

In this correspondence, we consider the multiuser successive refinement (MSR) problem, where the users are connected to a central server via links with different noiseless capacities, and each user wishes to reconstruct in a successive-refinement fashion. ...

2008

Diversity Embedded Codes: Theory and Practice

Sanket Dusad, Suhas Diggavi

Diversity embedded codes are high-rate space-time codes that have a high-diversity code embedded within them. They allow a form of communication where the high-rate code opportunistically takes advantage of good channel realizations while the embedded high ...

2008

Successive refinement via broadcast: Optimizing expected distortion of a Gaussian source over a Gaussian fading channel

Suhas Diggavi

We consider the problem of transmitting a Gaussian source on a slowly fading Gaussian channel, subject to the mean-squared error distortion measure. The channel state information is known only at the receiver but not at the transmitter. The source is assum ...

2008

Successive Refinement of Diversity for Fading ISI MISO Channels

Sanket Dusad, Suhas Diggavi

Multiplexing rate and diversity impose a fundamental trade-off in wireless communications. This tradeoff was investigated for Inter-symbol Interference (ISI) channels in [8]. A different point of view was explored in [2], [5], [6] where high rate codes wer ...

IEEE2008

Noncoherent multi-source network coding

Suhas Diggavi, Christina Fragouli, Mahdi Jafari Siavoshani

We examine the problem of multiple sources transmitting information to one or more receivers that require the information from all the sources, over a network where the network nodes perform randomized network coding. We consider the noncoherent case, wher ...

2008

Side-Information Scalable Source Coding

Suhas Diggavi

We consider the problem of side-information scalable (SI-scalable) source coding, where the encoder constructs a two-layer description, such that the receiver with high quality side information will be able to use only the first layer to reconstruct the so ...

Institute of Electrical and Electronics Engineers2008

Wireless Network Secrecy with Public Feedback

Etienne Perron, Emre Telatar, Suhas Diggavi

In this paper we consider secret communication between two special nodes ("source" and "destination") in a wireless network with authenticated relays: the message communicated to the destination is to be kept information-theoretically (unconditionally) sec ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2008

Asymmetric multi-level diversity coding

Suhas Diggavi, Soheil Mohajerzefreh

Symmetric multilevel diversity coding was introduced by Roche et al, where a set of K information sources is encoded by K encoders and the decoders reconstruct sources 1, . . . , k, where k is the number of encoders to which they have access. In this paper ...

Ieee Computer Soc Press, Customer Service Center, Po Box 3014, 10662 Los Vaqueros Circle, Los Alamitos, Ca 90720-1264 Usa2008

Rank Distance Codes for ISI channel

Sanket Dusad, Suhas Diggavi

Designs for transmit alphabet constrained spacetime codes naturally lead to questions about the design of rank distance codes. Recently, diversity embedded multi-level space-time codes for flat fading channels have been designed by using sets of binary mat ...

2007

Network Monitoring: it depends on your points of view

Suhas Diggavi, Christina Fragouli

End-to-end active network monitoring infers network characteristics by sending and collecting probe packets from the network edge, while probes traverse the network through multicast trees or a mesh of unicast paths. Most reported methods consider given so ...

2007

Bottleneck Discovery and Overlay Management in Network Coded Peer-to-Peer Systems

Suhas Diggavi, Christina Fragouli, Mahdi Jafari Siavoshani

The performance of peer-to-peer (P2P) networks depends critically on the good connectivity of the overlay topology. In this paper we study P2P networks for content distribution (such as Avalanche) that use randomized network coding techniques. The basic id ...

2007

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