en:users:drivers:ath9k:spectral_scan
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en:users:drivers:ath9k:spectral_scan [2016/12/23 13:35] Robert Felten [ath9k spectral scan] minor format fix |
en:users:drivers:ath9k:spectral_scan [2017/01/09 19:47] Adam Hunt Added 'speccy' to list of spectral scan tools |
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| * absolute magnitude (|i|+|q|, abs() for I/Q phase of the wireless signal) for each FFT bin (56 for subcarriers in HT20 mode and 128 in HT40 mode) | * absolute magnitude (|i|+|q|, abs() for I/Q phase of the wireless signal) for each FFT bin (56 for subcarriers in HT20 mode and 128 in HT40 mode) | ||
| * an index indicating the strongest FFT bin | * an index indicating the strongest FFT bin | ||
| - | * the maximum signal magnitude for each sample These information can be used to create an open source spectrum analyzer or interference classifier | + | * the maximum signal magnitude for each sample |
| - | To try it out, you can use the following commands to acquire samples for all channels which can be scanned: | + | These information can be used to create an open source spectrum analyzer or interference classifier. To try it out, you can use the following commands to acquire samples for all channels which can be scanned: |
| Line 103: | Line 103: | ||
| * [[https://github.com/simonwunderlich/FFT_eval|https://github.com/simonwunderlich/FFT_eval]] (HT20 only) | * [[https://github.com/simonwunderlich/FFT_eval|https://github.com/simonwunderlich/FFT_eval]] (HT20 only) | ||
| * [[https://github.com/LorenzoBianconi/ath_spectral|https://github.com/LorenzoBianconi/ath_spectral]] | * [[https://github.com/LorenzoBianconi/ath_spectral|https://github.com/LorenzoBianconi/ath_spectral]] | ||
| + | * [[https://github.com/bcopeland/speccy|https://github.com/bcopeland/speccy]] | ||
| (based on Adrian Chadd's documentation [[https://wiki.freebsd.org/dev/ath_hal(4)/SpectralScan|https://wiki.freebsd.org/dev/ath_hal%284%29/SpectralScan]]) | (based on Adrian Chadd's documentation [[https://wiki.freebsd.org/dev/ath_hal(4)/SpectralScan|https://wiki.freebsd.org/dev/ath_hal%284%29/SpectralScan]]) | ||
en/users/drivers/ath9k/spectral_scan.txt ยท Last modified: 2021/11/05 03:39 by Craig Younkins
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