In the OFDM communication context, semi-blind algorithms allow to cope with Doppler effect
due to the mobility of wireless systems. For slowly varying channels, the estimation process …

The aim of this thesis is to study the problem of iterative data detection in a realistic wireless
communication system, where the receiver disposes only of an imperfect (and possibly poor) …

OFDM systems traditionally perform channel coefficients estimation relying on known
training sequences. However in wireless systems, performance and mobility can be further …

We propose a hybrid channel estimation process for orthogonal frequency division
multiplexing (OFDM) systems. We show that the OFDM channel estimation process can be …

A semi-blind Expectation-Maximization (EM) channel estimation algorithm is proposed for
50 Gb/s quadrature phase shift keying (QPSK)-Discrete MultiTone (DMT) signal …

This paper presents a receiver that combines semi-blind channel estimation with the
decoding process for multiband OFDM UWB communications. We particularly focus on …

Pilot Aided Channel Estimation (PACE) in OFDM systems uses training sequences to
estimate the channel in a subset of the frequency bins, followed by interpolation to recover …

Castellà: Este proyecto trata sobre el problema de la estimación del canal de transmisión
mediante métodos no asistidos por datos (NDA-Non Data-Aided), para el caso concreto de …

Based on the expectation-maximization (EM) algorithm, an iterative time-domain channel
estimation approach capable of using a priori information is proposed for orthogonal …

In this paper, we propose a semi-blind MAP (maximum" a posteriori") channel estimation
method based on an expectation-maximization block algorithm (EM-MAP-block). In the …