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From LDPC Block to LDPC Convolutional Codes: Capacity, Stability, and Universality

Publications associées (290)

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Concatenated codes for block-fading channels

Albert Guillén i Fàbregas

In this thesis we study coding strategies for single-user block-fading channels. The block-fading channel is a simplified model of slowly varying wireless communication channels with stringent delay constraints. This model is particularly important in prac ...

EPFL2004

Capacity-approaching codes on the q-ary symmetric channel for large q

Mohammad Amin Shokrollahi

We give a short survey of several techniques to construct codes on GF(q) that approach the capacity of the q-ary symmetric channel. The q-ary symmetric channel represents the next level of difficulty after the binary erasure channel (BEC). Since the channe ...

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

On the joint source and channel coding of atomic image streams

Pascal Frossard

This paper presents an error resilient coding scheme for atomic image bitstreams, as generated by Matching Pursuit encoders. A joint source and channel coding algorithm is proposed, that takes benefit of both the flexibility in the image representation, an ...

IEEE2004

Algebraic-geometric codes on the erasure channel

Mohammad Amin Shokrollahi, Andrew Brown

This paper investigates the use of algebraic-geometric codes for data transmission over a packet network, by comparing their encoding/decoding speeds to those of the ubiquitous Reed-Solomon Codes. We take advantage of the fact that AG codes allow the const ...

2004

Raptor codes on symmetric channels

Mohammad Amin Shokrollahi, Mehdi Molkaraie, Seyed Omid Etesami

This paper extends the construction and analysis of Raptor codes originally designed in A. Shokrollahi (2004) for the erasure channel to general symmetric channels. We explicitly calculate the asymptotic fraction of output nodes of degree one and two for c ...

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

Fingerprinting: Bounding the Soft-Error Detection Latency and Bandwidth

Babak Falsafi

Fingerprinting summarizes the history of internal processor state updates into a cryptographic signature. The processors in a dual modular redundant pair periodically exchange and compare fingerprints to corroborate each other's correctness. relative to ot ...

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

Finite-Length Scaling for Iteratively Decoded LDPC Ensembles

Rüdiger Urbanke, Abdelaziz Amraoui

In this paper we investigate the behaviour of iteratively decoded low-density parity-check codes over the binary erasure channel in the so-called "waterfall region". We show that, according to a simplified model, the performance curves in this region follo ...

2003