SFO Estimation Scheme in OFDM-Based Power Line Communication System

Abstract: This paper proposes a efficient blind sampling frequency offset (SFO) estimation technique for an orthogonal frequency division multiplexing (OFDM) based power line communication (PLC) system. The main drawback of the conventional estimators is their limited estimation range and their high sensitivity to effect of SFO. To remedy these, this paper proposes two-step correlation scheme that exploits the structure of a transmission data symbol. This paper considers the high-speed ROBO mode of PLC system and focus on OFDM sequences copied by the ROBO interleaver. Computer simulations are employed to assess the performance of the proposed scheme and to make comparison with the conventional scheme.