Contribution to multipath channel estimation in an OFDM modulation context.
type: Dataset
description: In wireless communications systems, the transmission channel between the transmitter and the receiver antennas is one of the main sources of disruption for the signal. The multicarrier modulations, such as the orthogonal frequency division multiplexing (OFDM), are very robust against the multipath effect, and allow to recover the transmitted signal with a low error rate, when they are combined with a channel encoding. The channel estimation then plays a key role in the performance of the communications systems. In this PhD thesis, we study techniques based on least square (LS) and minimum mean square error (MMSE) estimators. The MMSE is optimal, but is much more complex than LS, and requires the a priori knowledge of the second order moment of the channel and the noise. In this presentation, two methods that allow to reach a performance close to the one of LMMSE while getting around its drawback are investigated. In another way, a third part of the presentation investigates the errors of estimation due to the interpolations.
identifier: NNT: 2013SUPL0028
issued: 2026-05-05T11:52:33.492521
language: fr
modified: 2026-05-05T11:52:33.492525
contact point: Organization
  fn: CCSD
keyword: broadcasting
keyword: canal-multi-trajets
keyword: diffusion
keyword: erreur-quadratique-moyenne
keyword: estimation
keyword: infoeu-reposemanticsdoctoralthesis
keyword: interpolation
keyword: least-square
keyword: mean-square-error
keyword: moindres-carres
keyword: multipath-channel
keyword: ofdm
keyword: spiotherengineering-sciences-physicsother
keyword: theses
landing page: https://theses.hal.science/tel-00988283

Contribution to multipath channel estimation in an OFDM modulation context.
type: Distribution
format: HTML
issued: 2026-05-05T11:52:33.500612
modified: 2026-05-05T11:52:33.473159
access URL: https://theses.hal.science/tel-00988283

test_moissonnage_selune
type: Agent