REDUCED COMPLEXITY CARRIER FREQUENCY OFFSET ESTIMATION AND SYMBOL TIMING RECOVER FOR SPECTRALLY SHAPED WIRELESS AND WIRELINE STANDARDS CONSIDERING SPECTRUM TILT IMPAIRMENTS

摘要

A system for reducing implementation complexity for estimation of a Carrier Frequency Offset (CFO) and a Symbol Timing Offset (STO) for an input signal for spectrally shaped multiple communication standards is provided. The system is implemented by replacing multiplier with shifters. The system includes a CFO estimation block, a STO estimation block, and a band extraction block that extracts a lower band edge and an upper band edge of the input signal. The STO estimation block includes a sample error generation block that computes a sampling timing error value, and a Phase Lock Loop block that estimates a frequency error and a phase error corresponding to the sampling timing error value. The CFO estimation block estimates the CFO based on (i) a spectrum tilt correction factor obtained from a tilt information and (ii) a corresponding shift value.