Title :
A Low-Complexity Synchronizer for OFDM-Based UWB System
Author :
Liu, Hsuan-Yu ; Lee, Chen-Yi
Author_Institution :
Dept. of Electron. Eng., Nat. Chiao-Tung Univ., Hsin-Chu
Abstract :
In current ultra-wideband (UWB) baseband synchronizer approaches, the parallel architecture is used to achieve over 500 MSamples/s throughput requirement. Therefore achieving low power and less area becomes the challenge of UWB baseband design. In this paper, a low-complexity synchronizer combining data-partition-based correlation algorithms and dynamic-threshold design is proposed for orthogonal frequency division multiplexing based UWB system. It provides a methodology to reduce design complexity with an acceptable performance loss. Based on the data-partition algorithms, both single auto-correlator and moving-average-free matched filter are developed with 528 Msample/s throughput for the 480 Mb/s UWB design. Simulation results show the synchronization loss can be limited to 0.8-dB signal-to-noise ratio for 8% system packet-error rate
Keywords :
OFDM modulation; low-power electronics; radio receivers; synchronisation; ultra wideband communication; 0.8 dB; 480 Mbit/s; OFDM; UWB baseband synchronizer; UWB system; auto-correlator filter; correlation algorithms; data-partition algorithms; dynamic threshold design; low-complexity synchronizer; moving-average-free matched filter; parallel architecture; Algorithm design and analysis; Baseband; Design methodology; Frequency synchronization; Heuristic algorithms; OFDM; Parallel architectures; Performance loss; Throughput; Ultra wideband technology; Data-partition; dynamic-threshold; moving-average-free matched filter (MF); single auto-correlator;
Journal_Title :
Circuits and Systems II: Express Briefs, IEEE Transactions on
DOI :
10.1109/TCSII.2006.882804
