Frequency Offset Correction for OFDM Systems

Abstract

In this paper, we propose a robust method to estimate carrier frequency offset (CFO) for orthogonal frequency division multiplexing (OFDM) systems. A training symbol with two identical halves is employed to measure the fractional part of the CFO. While the integral part is estimated by using a novel noise subspace based metric. Simulation results demonstrate that the proposed method can achieve an estimation range equal to the whole bandwidth of the OFDM signal.

Keywords

• Carrier frequency offset
• Noise subspace
• OFDM
• Wireless communications.