Method and system for reliable CFO and STO estimation in the presence of tuner induced impairment
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United States of America Patent
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Dec 17, 2013
Grant Date -
Oct 4, 2012
app pub date -
Mar 30, 2012
filing date -
Mar 31, 2011
priority date (Note) -
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Abstract
A system and method 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. 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 (i) a sample error generation block that computes a sampling timing error value, and (ii) 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 includes (i) a carrier offset error generation block that generates a carrier offset error value, and (ii) a leaky average block for performing a filter operation.
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