Time and Frequency Synchronization Scheme for IEEE802.15.3c OFDM System

A timing and sampling frequency synchronization scheme, based on the preamble and the pilots, is given in this paper, for the 60GHz OFDM system specified in the IEEE802.15.3c standard. Based on the Gray complementary sequences, an anti-multipath separated sliding correlation detection (SSCD) algorithm is fist proposed, and the positions of the correlation peaks are averaged to increase the anti-noise capability of timing. The possible residual lag error is corrected and moved to the range of cyclic prefix by adopting its tolerance to timing error. Then, a method doing phase equalization combined with integer sampling deviation pre-correction (PE-ISDPC) is proposed for sampling frequency synchronization, also exploiting the cyclic prefix tolerance to the integer sample deviation to reduce the implementation complexity. Simulation shows that the system has a good time and frequency synchronization performance, and the overall scheme has a low complexity.