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Application Layer Forward Error Correction for Mobile Multimedia Broadcasting

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Index Assignment for N Balanced Multiple Description Scalar Quantization

Pascal Frossard, Ivana Radulovic

In this paper, we address the design of any number of balanced multiple descriptions using the multiple description scalar quantization(MDSQ) technique. The proposed scheme has the advantages of low complexity, the possibility of being extended easily to a ...

2005

LDPC codes for fading Gaussian broadcast channels

Peter Allan Berlin, Daniela Tuninetti

In this work, we study coding over a class of two-user broadcast channels (BCs) with additive white Gaussian noise and multiplicative fading known at the receivers only. Joint decoding of low-density parity-check (LDPC) codes is analyzed. The message updat ...

2005

Low-density parity-check codes with rates very close to the capacity of the q-ary symmetric channel for large q

Mohammad Amin Shokrollahi

Transmission of packets over computer networks is subject to packet-level errors, which appear as "bursts" of bit-level errors and are not well modeled by memoryless binary channels. A standard scrambling technique is used for transmission of packets by th ...

2004

Asymptotic and finite-length analysis of low-density parity-check codes

Changyan Di

This thesis addresses the topic of Low-Density Parity-Check (LDPC) code analysis, both asymptotically and for finite block lengths. Since in general it is a difficult problem to analyze individual code instances, ensemble averages are studied by following ...

EPFL2004

DCC-MAC: A Decentralized MAC Protocol for 802.15.4a-like UWB Mobile Ad-Hoc Networks Based on Dynamic Channel Coding

Jean-Yves Le Boudec, Ruben Merz, Jörg Widmer

We present a joint PHY/MAC architecture (DCC-MAC) for 802.15.4a-like networks based on PPM-UWB. Unlike traditional approaches it fully utilizes the specific nature of UWB to achieve high rates at low protocol complexity. It is the first MAC protocol that a ...

2004

LDPC codes for Gaussian broadcast channels

Peter Allan Berlin, Daniela Tuninetti

We study coding over a class of two-user broadcast channels with additive white Gaussian noise and fading known at the receivers only. Joint decoding of low-density parity-check codes is analyzed. The message update rule at the mapping node linking the use ...

2004

Raptor codes

Mohammad Amin Shokrollahi

This paper exhibits a class of universal Raptor codes: for a given integer k, and any real /spl epsiv/>0, Raptor codes in this class produce a potentially infinite stream of symbols such that any subset of symbols of size k(1 + /spl epsiv/) is sufficient t ...

2004

Low-delay low-complexity error-correcting codes on sparse graphs

Xiao-Yu Hu

This dissertation presents a systematic exposition on finite-block-length coding theory and practice. We begin with the task of identifying the maximum achievable rates over noisy, finite-block-length constrained channels, referred to as (ε, n)-capacity Cε ...

EPFL2003

Serially concatenated coding for broadcasting S-UMTS applications

Christina Fragouli

Satellite-UMTS supports broadcast applications that involve transmission of the same encoded data over channels that may vary significantly. The same code must allow a user with a good channel to recover the information with low complexity, while a user wi ...

2002

FEC Performances in Multimedia Streaming

Pascal Frossard

In this paper, the performances of packet-level media-independent FEC schemes are computed in terms of both packet loss ratio and average burst length of multimedia data after error recovery. The set of equations leading to the analytical formulation of bo ...

2001