On Sat, Jun 11, 2011 at 11:12 AM, Eddie Sun <lf2ed...@ccns.ncku.edu.tw>wrote:
> Hi all, > > I have a USRP N210 and DBSRX2 daughter board, running on Ubuntu 10.04, and > I would like to get the L1 signal by > > using Gnuradio Companion to draw a GPS receiver flow graph (I have a GPS > Antenna), and I just need to get the IF signal into File > > Sink to get the .dat so I can use MATLAB to deal with the data, I have a > book "A Software-Defined GPS and Galileo Receiver: A > > Signal-Frequency Approach", This is the best book for software GPS. > there is a GNSS L1 front-end digram at p.55 (that is my only reference), > but I have no idea how to > > translate it into GNUradio Blocks.There is a ADC on that diagram, should I > just ignore it, or I need some blocks to complete that ADC? > ADC. Do you know what ADC means? If you do then you already have an ADC, which is the USRP. ;-) > > (There is no blocks called ADC)And there is several Band-Pass Filter in the > diagram with center frequency and 3dB Bandwidth, but I > > don't know how to translate it to the information that blocks needed.(Like > Low or High cutoff frequency, transition width ...etc) > A USRP is a baseband IF receiver. Tune it to the GPS L1 frequency with the right decimation rate so that you have your band of interest selected. This should give you the IF signal. > > Can anyone help me? Or has an example .grc or some website for related > information? > > > > Thanks, > > Eddie > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > >
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