Frequency offset estimation apparatus for intersymbol interference channels
US7116727B2 · kind B2 · utility
1Cited by
2References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 29, 2003 |
| Grant date | Oct 3, 2006 |
| Priority date | — |
| Expiry date | Mar 3, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2027/0065
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A frequency offset estimation apparatus for intersymbol interference channels. A storage area having M elements is provided to shift a received sample sequence by M samples to generate a lagged sample sequence. A sequence of preliminary values is calculated by differential operation between the received sample sequence and the lagged sample sequence. Next, a summation of the power of the preliminary value sequence over M′ samples is taken to obtain an accumulative sum. Finally, the angle of the accumulative sum is derived and then scaled by a factor. A frequency offset estimate for the received sample sequence is thus obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.