Frequency offset estimation scheme in the presence of time-varying DC offset for OFDM direct conversion receivers

Mamiko Inamori, Anas Muhamad Bostamam, Yukitoshi Sanada, Hideki Minami

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

This paper presents a frequency offset estimation scheme for Orthogonal Frequency Division Multiplex (OFDM) direct conversion receivers. The key idea is to use a differential filter for reduction of DC offset. Frequency offset is estimated in the presence of time-varying DC offset. In order to overcome the varying DC levels under automatic gain control (AGC) circuits, a threshold level is set for the output of the differential filter. The proposed compensation scheme offers superior frequency offset estimation when compared with a conventional scheme with a high pass filter.

Original languageEnglish
Pages (from-to)2884-2890
Number of pages7
JournalIEICE Transactions on Communications
VolumeE90-B
Issue number10
DOIs
Publication statusPublished - 2007

Fingerprint

High pass filters
Gain control
Networks (circuits)
Compensation and Redress

Keywords

  • DC offset
  • Direct conversion
  • Frequency offset
  • OFDM
  • Training sequence

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Networks and Communications
  • Software

Cite this

Frequency offset estimation scheme in the presence of time-varying DC offset for OFDM direct conversion receivers. / Inamori, Mamiko; Bostamam, Anas Muhamad; Sanada, Yukitoshi; Minami, Hideki.

In: IEICE Transactions on Communications, Vol. E90-B, No. 10, 2007, p. 2884-2890.

Research output: Contribution to journalArticle

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