Title :
Preamble-Based LMMSE Channel Estimation in OFDM/OQAM Modulation
Author :
Caro, Ludovic ; Savaux, Vincent ; Boiteau, Denys ; Djoko-Kouam, Moise ; Louet, Yves
Author_Institution :
ECAM Rennes, Rennes, France
Abstract :
This paper presents a preamble-based linear minimum mean square error (LMMSE) estimation technique for filter bank multicarrier (FBMC) modulations. Orthogonal frequency division multiplex (OFDM) systems have been extensively used in digital communication systems, for they are extremely efficient in terms of channel estimation and equalization. Estimation being a crucial part of digital communication systems, techniques have been developed to reduce the impact of noise on the channel estimation process, the optimal one being the LMMSE one. Until recently, non-orthogonal multicarrier modulations such as FBMC, were unable to use OFDM-like estimation techniques due to the non-orthogonality. The interference approximation method (IAM) is one of the most popular method among preamblebased estimation techniques with a limited complexity. This paper present a combination of IAM and a LMMSE-based algorithm that makes possible to achieve a LMMSE estimation in FBMC.
Keywords :
OFDM modulation; channel bank filters; channel estimation; mean square error methods; quadrature amplitude modulation; OFDM; OQAM modulation; channel equalization; digital communication systems; error estimation; filter bank multicarrier modulations; interference approximation method; linear minimum mean square; non-orthogonal multicarrier modulations; orthogonal frequency division multiplex systems; preamble-based LMMSE channel estimation; preamblebased estimation techniques; Channel estimation; Estimation; Interference; Joints; Modulation; Noise; OFDM;
Conference_Titel :
Vehicular Technology Conference (VTC Spring), 2015 IEEE 81st
Conference_Location :
Glasgow
DOI :
10.1109/VTCSpring.2015.7146025