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[Discuss-gnuradio] GPS Proof-of-Concept is available
From: |
Krzysztof Kamieniecki |
Subject: |
[Discuss-gnuradio] GPS Proof-of-Concept is available |
Date: |
Tue, 09 Mar 2004 02:32:35 -0500 |
User-agent: |
Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.6) Gecko/20040113 |
After many moons, I finally have something that may be of interest to people.
kkGPS (for lack of a better name) is the beginning of a software GPS receiver with software
correlators. Right now it uses a 5MS/s simulated noise free signal from six "satellites" with IFs of
~1.25MHz. The software decodes subframes 1, 2, and 3 and uses ephemeris data to calculate the user
position.
Currently the correlators run about 4x slower then needed for a realtime 12 channel receiver on my
P3 550Mhz with PC100 ram. A P4-HT 3.2Ghz with PC3200 ram that I have access too seems to be able to
run a ~30 channel receiver in realtime. The SSE correlator is a work in progress.
This is prototype code, so excuse the mess.
THERE WILL BE MAJOR CHANGES MADE TO THE CODE.
http://www.kamieniecki.com/krys/gps/README.txt
http://www.kamieniecki.com/krys/gps/kkGPS-0.0.zip
--
Krzysztof Kamieniecki
callsign:KB1KLB
mailto:address@hidden
- [Discuss-gnuradio] GPS Proof-of-Concept is available,
Krzysztof Kamieniecki <=