[USRP-users] Help in frequency shifting with USRP

Marcus D Leech patchvonbraun at gmail.com
Mon Nov 11 09:20:31 EST 2019


This is more of a generic DSP question. It’s the sort of thing that folks on the discuss-gnuradio list do all the time. 



Sent from my iPhone

> On Nov 11, 2019, at 8:35 AM, Snehasish Kar via USRP-users <usrp-users at lists.ettus.com> wrote:
> 
> 
> Hello 
> 
> I tried capturing GSM 900 band at a sample rate of 25e6 centered at 947.4e6 and stored in a file. Then on the captured data I tried shifting 935.2e6 to the center and perform a low pass filter samples out followed by a re-sampler to get 200e3 samples out. But I think the spectrum shifting is not wroking as it should be I am following the following link for spectrum shifting https://dsp.stackexchange.com/a/1993. I am using twinrx with 10gig sfp, UHD_3.13.1.0-0-unknown, ubuntu 16.04 and liquid dsp for signal processing.
> 
> fft - How to shift the frequency spectrum? - Signal Processing Stack Exchange
> Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.. Visit Stack Exchange
> dsp.stackexchange.com
> Please let me know, where I might be going wrong.
> 
> BR
> Snehasish
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