Analysis of timing and frequency o-sets on OFDM systems for fractional sampling rate

Byungju Lim; Young-Chai Ko

doi:10.1587/transcom.2016EBP3418

Analysis of timing and frequency o-sets on OFDM systems for fractional sampling rate

Byungju Lim, Young-Chai Ko

School of Electrical Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

Timing and frequency offsets are caused by imperfect synchronization at the receiver. These errors degrade the performance of OFDM systems by introducing inter-carrier-interference (ICI) and intersymbol- interference (ISI). In this paper, we derive signal-To-interference ratio (SIR) analytically with timing and frequency offsets for the case that the sampling rate of analog-To-digital converter (ADC) in OFDM receiver is an integer fraction of the signal bandwidth. We find the exact form of interference power as a function of the fractional sampling rate. Our derived analysis is confirmed by simulations and can be applied to see the exact performance of OFDM systems with fractional sampling rate.

Original language	English
Pages (from-to)	1946-1951
Number of pages	6
Journal	IEICE Transactions on Communications
Volume	E100B
Issue number	10
DOIs	https://doi.org/10.1587/transcom.2016EBP3418
Publication status	Published - 2017 Oct 1

Keywords

Fractional sampling
Frequency offset
OFDM systems
Synchronization
Timing offset

ASJC Scopus subject areas

Software
Computer Networks and Communications
Electrical and Electronic Engineering

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N2 - Timing and frequency offsets are caused by imperfect synchronization at the receiver. These errors degrade the performance of OFDM systems by introducing inter-carrier-interference (ICI) and intersymbol- interference (ISI). In this paper, we derive signal-To-interference ratio (SIR) analytically with timing and frequency offsets for the case that the sampling rate of analog-To-digital converter (ADC) in OFDM receiver is an integer fraction of the signal bandwidth. We find the exact form of interference power as a function of the fractional sampling rate. Our derived analysis is confirmed by simulations and can be applied to see the exact performance of OFDM systems with fractional sampling rate.

AB - Timing and frequency offsets are caused by imperfect synchronization at the receiver. These errors degrade the performance of OFDM systems by introducing inter-carrier-interference (ICI) and intersymbol- interference (ISI). In this paper, we derive signal-To-interference ratio (SIR) analytically with timing and frequency offsets for the case that the sampling rate of analog-To-digital converter (ADC) in OFDM receiver is an integer fraction of the signal bandwidth. We find the exact form of interference power as a function of the fractional sampling rate. Our derived analysis is confirmed by simulations and can be applied to see the exact performance of OFDM systems with fractional sampling rate.

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