Observatorio de I+D+i UPM

Memorias de investigación
Artículos en revistas:
A Reduced Complexity Scheme for Carrier Frequency Synchronization in Uplink 802.16e OFDMA
Año:2012
Áreas de investigación
  • Telecomunicación inalámbrica,
  • Procesado y análisis de la señal
Datos
Descripción
Synchronization of the carrier frequency o - set (CFO) in the uplink of OFDMA systems is a com- plex task because each user presents a di erent CFO. It is performed in two stages: estimation and compensa- tion. Although a few existing schemes already achieve good performance in terms of BER, all of them per- form huge amounts of operations, specially during esti- mation, thus leading to very costly, if not impractical, hardware implementations. Additionally, if estimation is performed in the time domain, a preamble is required. Since the IEEE 802.16e standard for OFDMA has no preamble at the beginning of the uplink frame, optional midambles must be used at the cost of reducing the sys- tem throughput. This paper proposes a combined CFO estimation and compensation technique that uses the pilot subcarriers of the 802.16e frame. It achieves simi- lar BER performance than previous approaches without any throughput penalty, while reducing the number of required computations by several orders of magnitude. This reduction is the result of a simpler estimation al- gorithm and two techniques that improve its accuracy: an iterative process integrated with the compensation stage and the delayed correction of the phase shifts.
Internacional
Si
JCR del ISI
Si
Título de la revista
Eurasip Journal on Advances in Signal Processing
ISSN
1687-6180
Factor de impacto JCR
0,811
Información de impacto
Volumen
DOI
Número de revista
Desde la página
1
Hasta la página
10
Mes
SIN MES
Ranking
Esta actividad pertenece a memorias de investigación
Participantes
  • Autor: Javier González Bayón (UPM)
  • Autor: Angel Fernandez Herrero (UPM)
  • Autor: Carlos Carreras Vaquer (UPM)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Laboratorio de Sistemas Integrados (LSI)
  • Departamento: Ingeniería Electrónica
S2i 2021 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)