I use usrp x300 SDR.
I'm confused about
sample_rate. How do I calculate
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I'm confused about Bandwidth and sample_rate. How i do calculate them? is sample_rate = Bandwidth?
Sample rate: This is a design parameter, not usually something you caclculate, but a requirement that you define from what you want to be doing. You set the sample rate of the USRP such that it sufficiently high for your application.
The Bandwidth field in the USRP blocks means the bandwidth of the analog front end. This is not configurable in most daughterboards you can plug into the X300, so just leave it empty.