Novel polyphase training sequence based synchronization estimator for OFDM

Author

Potnis, G. ; Jalihal, D.

Author_Institution

Aricent Technol. (Holdings) Ltd., Bangalore, India

fYear

2011

fDate

28-30 Jan. 2011

Firstpage

1

Lastpage

5

Abstract

Orthogonal Frequency Division Multiplexing (OFDM) systems are sensitive to timing and frequency estimation errors. A DFT spread modified polyphase training sequence is proposed which has better merit factor and peak to average power ratio. By using the proposed training sequence two estimators are presented for timing and frequency synchronization. The CRLB expressions in closed form for these two estimators are also presented under the assumption of strict decoupling of timing and frequency offsets. Simulation results show that the MSE of the proposed estimators follow their respective CRLB.

Keywords

OFDM modulation; discrete Fourier transforms; frequency estimation; mean square error methods; radio receivers; synchronisation; CRLB expression; DFT spread modified polyphase training sequence; MSE; OFDM receiver; OFDM system; frequency estimation error; frequency synchronization; merit factor; orthogonal frequency division multiplexing; peak to average power ratio; synchronization estimator; timing estimation error; timing synchronization; Correlation; Fading; Frequency estimation; Peak to average power ratio; Timing; Training;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications (NCC), 2011 National Conference on

Conference_Location

Bangalore

Print_ISBN

978-1-61284-090-1

Type

conf

DOI

10.1109/NCC.2011.5734711

Filename

5734711