Method and system for reliable CFO and STO estimation in the presence of tuner induced impairment
US8611471B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2012 |
| Grant date | Dec 17, 2013 |
| Priority date | — |
| Expiry date | Apr 7, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2027/0065
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.