A Joint Scheme for Carrier Frequency Offset Estimation, Carrier Phase Correction and Timing

This paper describes a joint scheme that estimates the carrier frequency offset, carrier phase as well determines the sampling timing. The proposed algorithm is based on the pilot signal, which consists of several training sequences with a good autocorrelation characteristic, such as Barker sequence, pseudo-noise (PN) sequence, etc. By measuring the correlation peak(s), the carrier phase and its change rate at assigned time interval can be derived, as well combined with the over-sampling process at thereceiver side, a near optimal sampling timing can be determined. Depending on the structure of the pilot signal as well the range of the carrier frequency offset (CFO), the carrier phase increment can be derived through one training sequence or two identical sequences. In turn the carrier phase frequency offset estimation can be derived by the measured phase increment. The scheme can be applied in wide range of wireless communication systems, especially for moderate data transmission.