Sample selector time domain interpolation
US7482953B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 2004 |
| Grant date | Jan 27, 2009 |
| Priority date | — |
| Expiry date | Apr 30, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/3881
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A signal resampler carries out a time domain interpolation of an input signal for compensating for frequency offset, such as found in an ADSL system. A sample selector interpolator carries out part of the interpolation and a second, e.g. polynomial interpolator carries out the rest of the interpolation. The time interval between samples being interpolated, can be effectively divided between a sample selector interpolator and a small second, e.g. polynomial interpolator. The complexity of the second, e.g. polynomial interpolator can be reduced or its accuracy increased if it is effectively interpolating over a much smaller time interval. The sample selector interpolator can be an oversampling arrangement, and enable the order of the second, e.g. polynomial interpolator to be reduced. Selected ones of the oversampled samples are fed to the second, e.g. polynomial interpolator to keep the operating frequency lower. A chain of upsamplers can be used to generate the oversampled samples.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.