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From: | Matt Ettus |
Subject: | Re: [Discuss-gnuradio] GPS recording/replay with USRP1 and RFX1200 |
Date: | Fri, 30 Oct 2009 11:17:43 -0700 |
User-agent: | Thunderbird 2.0.0.23 (X11/20090825) |
The RFX1800 is the best board to use for this. Matt Daniel Hooper wrote:
Thank you for the tip. So people are definitely using USRP as a GPS receiver with the DBSRX. I knew this was somewhere out there, but I couldn't pin the location down. As Feng pointed out to me, the RFX1200 does not have the proper frequency range to record/transmit on the L1 frequency of 1575 MHz. My understanding of GPS (fairly limited) says I need to handle a 2 MHz bandwidth, or 1574-1576 MHz to read the C/A code. So the RFX1800 should be able to handle this? Thanks On Fri, Oct 30, 2009 at 11:52 AM, Brian Padalino <address@hidden> wrote:On Fri, Oct 30, 2009 at 12:06 PM, Daniel Hooper <address@hidden> wrote:I am putting together a production line test system (on a budget) for a portable GPS device. Looking at my options for a GPS simulator, I'm getting some very, very high dollar, hits -- totally outside my budget. HOWEVER, I do personally own a USRP1, and I was thinking that if I can buy an RFX1200 to record and replay GPS signals, that would be sufficient. I don't need anything fancy, just 'is the antenna connected?' and 'will it obtain lock?' kinds of qualifications. My question is, has anyone tried this? Does anyone have a good reason why it wouldn't work?I've seen some of this and have found at least the following link: http://www.gps-sdr.com/source/html/main.html The Git repo seems to be last updated in September, so still somewhat active. Hope this helps. Brian
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