A Low-Complexity Synchronization Design for MB-OFDM Ultra-Wideband Systems
| Citation: | Ye, Z.; Duan, C.; Orlik, P.; Zhang, J., "A Low-Complexity Synchronization Design for MB-OFDM Ultra-Wideband Systems", IEEE International Conference on Communicaitons (ICC), ISBN: 978-1-4244-2075-9, pp. 3807-3813, May 2008 (IEEE Xplore) |
| MERL Report: | TR2008-032 |
Top-level structure of a parallel ACF based synchronization block. Numbers in delay blocks indicate synchronization symbol delay, i.e., a delay of 165 samples.
In this paper, we investigate the low-complexity synchronization design for multi-band orthogonal-frequency-division-multiplexing (MB-OFDM) ultra-wideband (UWB) systems. We propose a unified synchronizer design based on auto-correlation-function. The key component in the proposed synchronizer is a parallel signal detector structure in which multiple auto-correlation units are instantiated and their outputs are shared by other functional units in the synchronizer, including time-frequency pattern detection, symbol timing carrier frequency offset estimation and correction and frame synchronization. We show that, via analysis and simulations, such a design achieves not only a low computation cost which makes it attractive in implementation, but also equal or better performance compared to the cross-correlation based designs.
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