A study on a diversity receiver for OFDM packet-based wireless access systems

摘要

This paper proposes a novel space diversity OFDM receiver that obtains large diversity gain by improving both carrier frequency synchronization and phase tracking in addition to that of symbol timing detection. The accuracy of carrier frequency synchronization is improved by combining the carrier frequency error information detected at all diversity branches and that of phase tracking is improved by the phase tracking of sub-carrier signals after maximal ratio diversity combining. Computer simulation results show that the proposed scheme effectively improves the diversity gain despite low C/N environment.