Sylphase SDGPS
The software-defined GPS(/GNSS) toolkit
|
Type signature: (raw->cooked)
The sw-correlator
node is a raw sink and cooked source. It acquires and tracks satellite signals, albeit much less efficiently than than the hardware correlator on the Infix-1's FPGA.
Below is an example of the software correlator being run on a raw stream from a file. The tracker, decoder, and kf2 nodes follow it to produce a solution stream, which is then written to a file.
Usage:
sw-correlator [OPTION]...
Allowed options:
Option | Description |
---|---|
--help | produce help message |
--deterministic | run synchronously so that everything is deterministic |
--correlators CORRELATORS | number of correlator taps (default: minimum required by tracker node) |
--correlator-spacing CORRELATOR_SPACING | spacing of correlators (units: samples) (default: value preferred by tracker node) |
--correlator-config CONFIG_STR | get per-substream --correlators and --correlator-spacing values from config string (run "sdgps help" for examples) |
--validate | test correlator against reference implementation |
--benchmark | benchmark correlator |
--algorithm ALGORITHM (=fast) | use ALGORITHM algorithm (choices: fast, simple) |
--acq-effort ACQ_EFFORT (=1) | scale acquisition effort. only has an effect if --deterministic is used |
--output-samples | output GNSSSamplePackets into cooked stream |
--max-svs COUNT (=100) | don't try to track more than this many SVs per GNSS system |
This example uses the sw-correlator
instead of the hardware correlator. You can add options such as --deterministic
if you want to run everything on a single thread.