Circuit and method for distinguishing between an OFDM signal and a radar signal
US8660219B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 3, 2012 |
| Grant date | Feb 25, 2014 |
| Priority date | — |
| Expiry date | Apr 3, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04K3/822
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A radar detector determines whether an input signal is an orthogonally frequency division multiplexed (OFDM) signal or a radar signal by applying at least first and second bandpass filtering operations having substantially non-overlapping passbands to the input signal, each filtering operation having a passband of width substantially less than a relatively large instantaneous bandwidth characteristic of an OFDM signal and substantially greater than a relatively small instantaneous bandwidth characteristic of a radar signal. The detector multiplies power levels of output signals of the first and second filtering operations to form a power product signal and compares the power level of the power product signal with a threshold level and providing an indicating signal in a first state if the power level of the power product signal exceeds the threshold level and otherwise providing said indicating signal in a second state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.