Methods and apparatus for estimating channel time and frequency correlations in OFDM communication receiver
US9100227B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 28, 2012 |
| Grant date | Aug 4, 2015 |
| Priority date | — |
| Expiry date | Apr 19, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2647
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Channel time and frequency correlations are determined from OFDM symbols and subframes using appropriately scaled sums of the products of the received pilot symbols at predetermined intervals n in time and/or frequency of resource elements within the resource blocks of the subframes. The correlation estimates may optionally be improved using pilot symbols for a plurality of antennas and for a plurality of pilot signal ports, and across a plurality of subframes. The calculated channel time and frequency correlations may be employed to improve estimates of channel characteristics for purposes such as selection of a transmission mode between a base station and a user equipment on the channel or for the purpose of channel equalization and data demodulation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.