A performance and complexity comparison of auto-correlation and cross-correlation for OFDM burst synchronization

A symbol timing synchronization scheme is critical in the design of an OFDM receiver. Large timing errors can result in a loss of orthogonality between subcarriers, ISI and severe bit error degradation. To minimize this degradation, standards incorporate preambles suitable for two kinds of synchroni...

Full description

Saved in:
Bibliographic Details
Published in2003 IEEE International Conference on Acoustics, Speech, and Signal Processing, 2003. Proceedings. (ICASSP '03) Vol. 2; pp. II - 341
Main Authors Fort, A., Weijers, J.-W., Derudder, V., Eberle, W., Bourdoux, A.
Format Conference Proceeding
LanguageEnglish
Published IEEE 2003
Subjects
Autocorrelation
AWGN
Degradation
Detectors
Field programmable gate arrays
Frequency synchronization
Hardware
Maximum likelihood detection
OFDM
Timing
Online AccessGet full text

Cover

More Information
Summary:A symbol timing synchronization scheme is critical in the design of an OFDM receiver. Large timing errors can result in a loss of orthogonality between subcarriers, ISI and severe bit error degradation. To minimize this degradation, standards incorporate preambles suitable for two kinds of synchronization algorithms: auto-correlation and crosscorrelation. Unfortunately, the performance and complexity tradeoffs between these algorithms have not been well explored. To address this problem, we have built an FPGA implementation of a synchronization system using both autocorrelation and cross-correlation. Based on our results, in this paper we propose a novel cross-correlation synchronizer and hardware architecture. We then compare its performance and complexity to auto-correlation algorithms for HiperLAN/2 and IEEE 802.11a preambles.
ISBN:9780780376632
0780376633
ISSN:1520-6149
2379-190X
DOI:10.1109/ICASSP.2003.1202364