Low Complexity Cell Search For Mobile OFDMA System

In this paper, a low complexity cell search algorithm for mobile OFDMA systems is presented, with IEEE 802.16e as the example. We propose a method, to identify a dominant sector at the sector boundary, using common sync symbol. The information about the dominant sector reduces the complexity of cell search. Extensive simulation results show that the new technique using common sync symbol can achieve better performance than the conventional schemes for achieving initial timing acquisition, fractional frequency offset correction, integer frequency offset estimation and dominant sector identification.