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Robust Non-Coherent Timing Acquisition in IEEE 802.15.4a IR-UWB Networks

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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

Receiver design for multi-antenna wireless communications

Andreas Peter Burg

Algorithm choices and corresponding VLSI architectures for spatial multiplexing receivers in multiple-input multiple-output (MIMO) communication systems are described in this paper. Implementations of linear and successive interference cancellation receive ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2005

Multiuser Interference in TH-UWB

Pierre-André Farine, Cyril Botteron

Introduction Motivations and Goals Description TH-UWB Receiver Architecture ...

2005

Space-time coding in MISO-OFDM systems with implementation impairments

Ali H. Sayed

Implementation of OFDM-based systems suffers from in-phase and quadrature-phase (IQ) imbalances in the front-end analog processing. The resulting distortion due to IQ imbalances can limit the achievable operating SNR at the receiver, especially when space- ...

IEEE2004

An optimum OFDM receiver exploiting cyclic prefix for improved data estimation

Ali H. Sayed

Orthogonal frequency division multiplexing (OFDM) is a promising technique for multi-antenna broadband systems, since it significantly reduces receiver complexity by providing orthogonal subchannels. A drawback of OFDM systems is the performance/rate reduc ...

2003

A robust receiver for multi-user uplink DS-CDMA

Ali H. Sayed

This paper presents a robust receiver for uplink direct sequence code-division multiple access (DS-CDMA) systems. The receiver uses low order auto-regressive models to approximate the multi-path fading channel taps, and a post correlation-based uncertain m ...

2003

Statistical analysis and optimization of chaos based broadband communications

Thomas Schimming

This thesis treats the topic of chaos based broadband communication schemes, with particular emphasis on the statistical analysis and optimization of such schemes. The work is motivated by the recent advances in nonlinear system theory suggesting advantage ...

EPFL2002

A No-Reference Perceptual Blur Metric

Touradj Ebrahimi, Pina Marziliano, Frédéric Dufaux, Stefan Winkler

In this paper, we present a no-reference blur metric for images and video. The blur metric is based on the analysis of the spread of the edges in an image. Its perceptual significance is validated through subjective experiments. The novel metric is near re ...

2002

Steganography for Three-Dimensional Polygonal Meshes

Touradj Ebrahimi, Nicolas Aspert, Elisa Drelie Gelasca

This paper proposes a method to embed information into a 3D model represented by a polygonal mesh. The approach used consists in slightly changing the position of the vertices, in uencing the length of approximation of the normals to the surface. This tech ...

EUSIPCO2002

Shadow identification and classification using invariant color models

Touradj Ebrahimi, Elena Salvador

A novel approach to shadow detection is presented in this paper. The method is based on the use of invariant color models to identify and to classify shadows in digital images. The procedure is divided into two levels: first, shadow candidate regions are e ...

SPIE2001