Frame synchronization of OFDM systems in frequency selective fading channels

Author

Speth, Michael ; Classen, Ferdinand ; Meyr, Heinrich

Author_Institution

Lehrstuhl fur Intergrierte Syst. der Signalverabeitung, Aachen, Germany

Volume

3

fYear

1997

fDate

4-7 May 1997

Firstpage

1807

Abstract

This paper investigates the topic of frame synchronization for systems based on the OFDM principle. After introducing the system model we discuss the task of a frame-synchronization and analyze the effects of a frame offset. From this we derive an appropriate criterion to measure the performance of synchronization algorithms under multipath conditions. We examine two algorithms for frame synchronization: the first algorithm is based on an evaluation of periodic structures. Since it is completely independent of a frequency offset it may be applied for system acquisition and burst synchronization. If the requirements are very high as in terrestrial TV broadcasting a second algorithm is needed to attain sufficient accuracy. The algorithm presented for this purpose is based on the evaluation of the channel estimate, so no further training data is required

Keywords

fading; frequency division multiplexing; synchronisation; television broadcasting; time-varying channels; OFDM systems; burst synchronization; channel estimate; frame offset; frame synchronization; frequency selective fading channels; multipath conditions; performance; periodic structures; synchronization algorithms; system acquisition; terrestrial TV broadcasting; Channel estimation; Degradation; Digital video broadcasting; Fading; Frequency estimation; Frequency synchronization; Gaussian noise; Interpolation; OFDM; Periodic structures;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1997, IEEE 47th

Conference_Location

Phoenix, AZ

ISSN

1090-3038

Print_ISBN

0-7803-3659-3

Type

conf

DOI

10.1109/VETEC.1997.605870

Filename

605870