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Recording two GPS L bands simultaneously

Greetings everyone,

 

I have been using a USRP N310 to record GPS L1 RF data into a file, which I later use to test a GNSS software receiver (gnss-sdr).

Now I am interested in testing the receiver in dual-band operation mode - GPS L1 + L5.

 

Can someone please indicate how I can record the two bands simultaneously?

 

Attached is the Matlab script I use to record GPS L1 RF data. I would greatly appreciate it if someone could tell me what modifications are required to record both L1 and L5.

 

Thank you in advance for your time,

Pedro

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