Rapid cell search in OFDM based cellular systems

Abstract

Cell search is one of the most challenging tasks in cellular systems. There have been large efforts on the synchronization problem in OFDM based cellular systems. Conventional synchronization schemes, however, still have problems in initial timing acquisition and cell identification, requiring a large cell search time. In this contribution, we propose a novel three-step cell search scheme with the use of a new preamble for OFDMbased cellular systems. Simulation results show that the proposed cell search scheme can significantly reduce the mean cell search time in multi-cell environment, while reducing the computational complexity.