Radar detection for wireless communication devices
View Patent ↗A method and apparatus for detecting radar signals in single and multiple (extension) channel wireless network frequencies uses spectral and DC analysis. Spectral images produced through a Fast Fourier transform may be captured and analyzed to determine if any radar signals may be present within the selected wireless network frequencies. A plurality of spectral images may also be analyzed to determine if frequency shifting radar signals are present as well. DC analysis of the power contained at the wireless carrier frequencies may detect radar signals that may be centered near those frequencies.
1. A wireless network device comprising:
an analog section;
a digital section including:
a DC removal unit for receiving an output of the analog section;
an FFT unit for receiving an output of the DC removal unit;
a spectral analysis unit for receiving the output of the FFT unit;
a first power measuring unit for receiving the output of the DC removal unit;
a filter for receiving the output of the DC removal unit; and
a second power measuring unit for receiving the output of the filter; and
a processor for receiving the output of the DC removal unit, the spectral analysis unit, the first power measuring unit, and the second power measuring unit.
2. The wireless network device of claim 1 , wherein the processor includes an averaging unit for receiving an output of the spectral analysis unit.
3. A wireless network device comprising:
an analog section;
a digital section including:
a DC removal unit for receiving an output of the analog section;
an FFT unit for receiving an output of the DC removal unit;
a spectral analysis unit for receiving the output of the FFT unit;
a first power measuring unit for receiving the output of the DC removal unit;
a signal splitter for receiving the output of the DC removal unit;
a first filter for receiving the output of the signal splitter; and
a second power measuring unit for receiving the output of the first filter; and
a second filter for receiving the output of the signal splitter; and
a third power measuring unit for receiving the output of the second filter; and
a processor for receiving the output of the DC removal unit, the spectral analysis unit, the first power measuring unit, the second power measuring unit, and the third power measuring unit.
4. The wireless network device of claim 3 , wherein the processor includes an averaging unit for receiving an output of the spectral analysis unit.
5. A wireless network device comprising:
an analog section;
a digital section including:
a DC removal unit for receiving an output of the analog section;
an FFT unit for receiving an output of the DC removal unit;
a spectral analysis unit for receiving the output of the FFT unit;
a first power measuring unit for receiving the output of the DC removal unit;
a signal splitter for receiving the output of the DC removal unit;
a plurality of processing paths, each processing path for receiving an output of the signal splitter, and each processing path including:
a filter for receiving the output of the signal splitter; and
a power measuring unit for receiving the output of the filter; and
a processor for receiving the output of the DC removal unit, the spectral analysis unit, the first power measuring unit, and each processing path.
6. The wireless network device of claim 5 , wherein frequencies filtered by filters of the plurality of processing paths overlap.
7. The wireless network device of claim 5 , wherein the processor includes an averaging unit for receiving an output of the spectral analysis unit.