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Turbo Encoder Design for Symbol Interleaved Parallel Concatenated Trellis Coded Modulation

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Distributed coding of multiresolution omnidirectional images

Pascal Frossard, Ivana Tosic, Vijayaraghavan Thirumalai

This paper addresses the problem of compact representation of a 3D scene, captured by distributed omnidirectional cameras. As the images from the sensors are likely to be correlated in most practical scenarios, we build a distributed algorithm based on cod ...

2007

Smart Antenna-Aided Multicarrier Transceivers for Mobile Communications

Yosef Akhtman

In spite of an immense interest from both the academic and the industrial communities, a practical multipleinput multiple-output (MIMO) transceiver architecture, capable of approaching channel capacity boundaries in realistic channel conditions remains lar ...

University of Southampton2007

Channel coding and modulation based on chaotic systems

Slobodan Kozic

In this thesis, a new class of codes on graphs based on chaotic dynamical systems are proposed. In particular, trellis coded modulation and iteratively decodable codes on graphs are studied. The codes are designed by controlling symbolic dynamics of chaoti ...

EPFL2006

Weight Distribution of Low-Density Parity-Check Codes

Rüdiger Urbanke, Changyan Di

We derive the average weight distribution function and its asymptotic growth rate for low-density parity-check (LDPC) code ensembles. We show that the growth rate of the minimum distance of LDPC codes depends only on the degree distribution pair. It turns ...

2006

Silicon implementation of an MMSE-based soft demapper for MIMO-BICM

Andreas Peter Burg

The performance of systems employing bit-interleaved coded modulation (BICM) critically depends on the availability of soft information. In the multi-antenna case, the extraction of optimum bit-metrics becomes prohibitively complex, so that suboptimal solu ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2006

Posterior Based Keyword Spotting with A Priori Thresholds

Hervé Bourlard, Samy Bengio, Hamed Ketabdar

In this paper, we propose a new posterior based scoring approach for keyword and non keyword (garbage) elements. The estimation of these scores is based on HMM state posterior probability definition, taking into account long contextual information and the ...

2006

Posterior Based Keyword Spotting with A Priori Thresholds

Hervé Bourlard, Samy Bengio, Hamed Ketabdar

IDIAP2006

Efficient error correction solutions for OFDM based digital video

Mauro Lattuada

The robustness of the delivery of digital compressed video streams has always been one of the main topic of the standardization bodies to assure the Quality of the Service (QoS). The MPEG standard which is nowadays the reference for digital television defi ...

EPFL2005

Wireless Image Transmission Using Turbo Codes and Optimal Unequal Error Protection

Nikolaos Thomos

A novel image transmission scheme is proposed for the communication of SPIHT image streams over wireless channels. The proposed scheme employs turbo codes and Reed-Solomon codes in order to deal effectively with burst errors. An algorithm for the optimal u ...

Institute of Electrical and Electronics Engineers2005

Unequal Error Protection of Atomic Image Streams

Pascal Frossard, Pierre Vandergheynst

This paper presents an unequal error protection scheme for atomic image bitstreams. An atomic stream is the encoded version of a digital image, which is represented as a sum of bi-dimensional functions, as typically generated by Matching Pursuit encoders. ...

2005