A novel method of carrier frequency offset estimation for OFDM systems

作者：Li, MQ^*; Zhang, WJ

来源：IEEE Transactions on Consumer Electronics, 2003, 49(4): 965-972.

DOI：10.1109/TCE.2003.1261182

• frequency synchronization
• OFDM
• DVB

This paper proposes a new CFO (carrier frequency-offset) estimation method for OFDM systems. This method uses scattered pilots to estimate the both integer and fractional CFO, which are usually estimated by continual pilots. Since scattered pilots are usually used to estimate CFR (channel frequency response), using them, at the same time, to estimate frequency-offset will not bring about additional cost for the system. Thus, subchannels, applied to transmit the continual pilots, will he saved for useful data, which increases the spectral efficiency. Moreover, performances of estimating CFO by both scattered and continual pilots are compared and analyzed in both AWGN and multipath fading channels. Theoretical analysis and simulation results show that for both integer and fractional CFO estimation, the performance of the scattered pilots-based algorithm is as good as that of continual pilots-based algorithms or acceptable for practical application(1).

• 出版日期2003-11
• 单位上海交通大学