Methods and systems for improved channel estimation in multi-carrier systems
US8989311B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 22, 2010 |
| Grant date | Mar 24, 2015 |
| Priority date | — |
| Expiry date | May 4, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/024
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Wireless receiver circuits and methods include algorithms for switching between a least-squares/minimum mean-square error method of channel estimation known as the CE algorithm, and a continuous plot method of channel estimation known as the CPCE algorithm based upon channel characteristics to improve reception of wireless communications in different reception conditions. In an embodiment, the CPCE algorithm may be selected by a processor for use in channel estimation when a calculated number of candidate paths is less than or equal to a first threshold value, a calculated power ratio of the L strongest paths to the total of all paths is greater than or equal to a second threshold value, and the maximum Automatic Gain Control variation is greater than or equal to a third threshold value. Threshold values may be based on field testing, and set to values at which the CE or CPCE algorithm exhibits better performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.