Non-Decision-Aided Feedforward Carrier Frequency Offset Estimator
GE Lin-dong · Dianzi xuebao · 2001
In this paper, we propose a non-decision-aided feedforward carrier frequency offset estimator for rotationally symmetric constellation. It is derived from the maximum likelihood (ML) principle. In order to solve the problem of phase wrapping and extend the estimation range, a new phase unwrapping algorithm is proposed. For 2π/M rotation symmetric constellation, the estimation range can be extended to ±1/(2MT). Computer simulation results demonstrate the estimation range, estimation precision and complexity of the estimator.