The characterize-channel-{rx,tx} nodes let you characterize a physical GNSS transmitter -> GNSS receiver channel, which includes the properties of the transmitter, the medium (e.g. cables, splitters), and the receiver. The frequency response is computed from the cross-correlation of a pseudorandom noise code.
Type signature: (raw->[raw])
Usage:
characterize-channel-rx [OPTION]... TX_CONFIG
Allowed options:
| Option | Description |
|---|---|
| --help | produce help message |
| --tx_config TX_CONFIG | config string (run "sdgps help" for examples) |
| --tx-gnss-stream arg | GNSS stream from TX_CONFIG to use to regenerate PRN code (default: GNSS_STREAM) |
| --gnss-stream GNSS_STREAM (=0) | GNSS stream to use |
| --duration DURATION (=1) | length of data to plot (units: seconds) |
| --period PERIOD (=1) | offset between subsequent plots (units: seconds) |
| --offset OFFSET (=0) | offset into each period of data to plot (units: seconds) |
| --scale-x SCALE_X (=1) | scale X coordinates by this number |
| --wait | wait for each plot to be acknowledged |
| --psd | plot power spectral density (default if no other plots are specified) |
| --time | plot time-domain signal (note: limited to 1024 samples) |
| --psd-bins arg (=4096) | number of frequency bins for PSD |
| --exit-after-first-plot | wait for first plot to be acknowledged, then exit |
| --plot-title-suffix arg | append string to plot titles |
Type signature: (->raw)
Usage:
characterize-channel-rx [OPTION]... TX_CONFIG
Allowed options:
| Option | Description |
|---|---|
| --help | produce help message |
| --tx_config TX_CONFIG | config string (run "sdgps help" for examples) |
| --tx-gnss-stream arg | GNSS stream from TX_CONFIG to use to regenerate PRN code (default: GNSS_STREAM) |
| --gnss-stream GNSS_STREAM (=0) | GNSS stream to use |
| --duration DURATION (=1) | length of data to plot (units: seconds) |
| --period PERIOD (=1) | offset between subsequent plots (units: seconds) |
| --offset OFFSET (=0) | offset into each period of data to plot (units: seconds) |
| --scale-x SCALE_X (=1) | scale X coordinates by this number |
| --wait | wait for each plot to be acknowledged |
| --psd | plot power spectral density (default if no other plots are specified) |
| --time | plot time-domain signal (note: limited to 1024 samples) |
| --psd-bins arg (=4096) | number of frequency bins for PSD |
| --exit-after-first-plot | wait for first plot to be acknowledged, then exit |
| --plot-title-suffix arg | append string to plot titles |
1.15.0 