Dynamic clear channel assessment using spectrum intelligent interference nulling
US8718560B2 · kind B2 · utility
13Cited by
23References
19Claims
0Family size
Assignee
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Key dates
| Filing date | Jul 7, 2011 |
| Grant date | May 6, 2014 |
| Priority date | — |
| Expiry date | Jan 25, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B17/345
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
At a wireless device operating in an unlicensed frequency band, energy received at a plurality of antennas is analyzed to detect interference on a channel in the unlicensed frequency band. The type of interference detected in the received energy is determined. Parameters are then generated for a nulling filter based on the type of interference detected in the received energy. The nulling filter is applied to the received energy at the plurality of antennas to produce a spatially filtered output. The spatially filtered output is evaluated to determine whether to send a transmission on the channel in the unlicensed frequency band.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.