Hello Christian,
Thank you very much for the links.
On Sun, 12 Dec 2010 19:22:41 +0100, "Christian Vogel" vogelchr@vogel.cx wrote:
There are a few. My Trimble Thunderbolt can give you doppler and codephase (gps often calls it "pseudorange").
Thats interesting, the ublox 5 GPS module I was playing with only provides those data if you have the so called "raw data premium feature" enabled (whatever this means, I have not yet looked at the details).
Sparkfun sells "only the frontend" (mixer, 1-bit ADC, USB) with sourcecode available in a book and on DVD (WTF?!)
Interesting device, I wasn't aware of it (I know about the book). Is the Source Code of the book available ? So far I have only seen some material for download at the following site, not sure if there is the whole content of the DVD:
http://kom.aau.dk/project/softgps/
Would be interesting to use the code with a USRP.
There's actually quite a lot of information out there, but there also seem to be quite a lot of half-abandoned projects (and a few seem to have vanished since the last time I had an interest in it around 2005).
I had a short look at some but always had the impression that it is not exactly what I am looking for. I guess I should try to get a GPS receiver which provides the required data, thats probably the easiest approach.
Best regards, Dieter
Hi Dieter,
Interesting device, I wasn't aware of it (I know about the book). Is the Source Code of the book available ? So far I have only seen some material for download at the following site, not sure if there is the whole content of the DVD:
The (blue) receiver is the old dongle sold by SparkFun during the last years. I only remember from visiting their website, but don't own one. I don't know if the DVD contains more than the matlab code that can be downloaded.
There's actually quite a lot of information out there, but there also seem to be quite a lot of half-abandoned projects (and a few seem to have vanished since the last time I had an interest in it around 2005).
This site (from 2003)... http://home.earthlink.net/~cwkelley/ ...explains the calculation in the "Operations" section, it's a rather concise summary of the basic math involved.
I had a short look at some but always had the impression that it is not exactly what I am looking for. I guess I should try to get a GPS receiver which provides the required data, thats probably the easiest approach.
http://home.tiscali.nl/samsvl/oemtable.htm has a table comparing various chipsets, some are quite ancient.
Chris
On Sun, Dec 12, 2010 at 10:06:48PM +0100, Christian Vogel wrote:
There's actually quite a lot of information out there, but there also seem to be quite a lot of half-abandoned projects (and a few seem to have vanished since the last time I had an interest in it around 2005).
In the hardware side i think this deserver a look:
http://www.weblab.dlr.de/rbrt/GpsNav/Namuru/Namuru.html
In sofware, gps-sdr
http://gps-sdr.com (website seems down since last weeek, hope get back soon) http://www.ctae.org/sdr/
Have samples, code and doc
If you have question about code or something else just drop a mail to then (CTAE). most of the time will respond
saludos !
Cristian Paul
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Christian Vogel -
Cristian Paul Peñaranda Rojas -
Dieter Spaar