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

A. Fort, J.-W. Weijers, V. Derudder, W. Eberle, A. Bourdoux
2003 IEEE International Conference on Acoustics, Speech, and Signal Processing, 2003. Proceedings. (ICASSP '03).  
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
more » ... 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.
doi:10.1109/icassp.2003.1202364 dblp:conf/icassp/FortWDEB03 fatcat:c47t7ulebndlpkj3poltco4dcy