Synchronization schemes for packet OFDM system

Author

Tang, Haiyun ; Lau, Kam Y. ; Brodersen, Robert W.

Author_Institution

Berkeley Wireless Res. Center, CA, USA

Volume

5

fYear

2003

fDate

11-15 May 2003

Firstpage

3346

Abstract

A complete OFDM synchronization chain is proposed based on practical synchronization schemes. The synchronization is accomplished in three steps: frame detection (or timing), frequency offset estimation, and phase tracking. For frame detection, time-domain differential PN sequence is used. For frequency offset estimation, time-domain correlation of adjacent pilot symbols estimates the fractional part of the frequency offset and frequency-domain differential PN sequence is used to find the integer part. The phase offset due to frequency offset estimation error as well as the phase noise is tracked using a digital phase lock loop.

Keywords

OFDM modulation; digital phase locked loops; frequency estimation; packet radio networks; phase noise; pseudonoise codes; synchronisation; OFDM synchronization chain; differential PN sequence; digital phase lock loop; frame detection; frequency offset estimation; phase noise; phase tracking; pilot symbols estimates; synchronization schemes; time-domain correlation; Estimation error; Frequency estimation; Frequency synchronization; OFDM; Phase detection; Phase estimation; Phase frequency detector; Phase noise; Time domain analysis; Timing;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, 2003. ICC '03. IEEE International Conference on

Print_ISBN

0-7803-7802-4

Type

conf

DOI

10.1109/ICC.2003.1204075

Filename

1204075