Time and Frequency Synchronization Algorithms for OFDM-UWB System Based on IEEE802.15.3c Standard

In this paper, an intact time and frequency synchronization scheme was presented based on the preamble and the pilots for the OFDM UWB system specified in the IEEE802.15.3c standard. An anti-multipath separated sliding correlation detection (SSCD) method was proposed based on the Gray complementary sequences, and the positions of the correlation peaks were averaged to increase the anti-noise capability of timing. A sampling frequency synchronization method was also presented for doing phase equalization combined with integer sampling deviation pre-correction (PE-ISDPC), which could exploit the tolerance of the cyclic prefix to the integer sample deviation, reducing the implementation complexity. Simulation results show that the system has a better performance of time and frequency synchronization, and the complexity of overall scheme is low.