Hi Olo, On one point regarding an FFT length of 8192, there is likely an issue with using the Ettus FFT block. In the past (I haven't checked recently), this block was limited to a maximum FFT size of 1024 because the entire FFT had to fit in one packet where the maximum packet payload was about 2000 samples. It is possible to use larger FFTs, but this requires some custom code that divorces the FFT size from the packet size. Rob
On Mon, Aug 26, 2024 at 7:41 AM Olo via USRP-users < usrp-users@lists.ettus.com> wrote: > Hello, > > I am currently working on a custom FPGA image that utilizes RFNoC blocks > provided by Ettus through the UHD repository. Specifically, I am using > blocks such as split, window, fft, and logpwr in my design. > > My goal is to achieve the following: > > 1. *First TwinRX (radio0):* Use one channel to display every n-th PSD, > while simultaneously recording a narrowband channel within the displayed > spectrum (using split and ddc). > 2. *Second TwinRX (radio1):* Rapidly sweep a large bandwidth and > display the PSD, also utilizing the window, fft, and logpwr blocks. > > I would greatly appreciate your feedback on the following points: > > 1. *Validation of Initial Design:* I have attached my initial attempt > at creating this FPGA image. Could you please review it and let me know if > this approach is correct? > 2. *Achieving Specific PSD Size:* Is it possible to achieve a PSD size > of, for example, 8192 using the window, fft, and logpwr blocks? If so, > could you advise on the necessary steps to accomplish this? > 3. *TwinRX Channel Configuration:* Is it feasible to use the second > channel on the second TwinRX to receive on a static frequency while the > first channel sweeps, and vice versa, can the second channel on the first > TwinRX sweep a portion of the spectrum while the first channel remains on a > static frequency? > > Your guidance on these questions would be extremely valuable, as it is > critical to the success of my project. > > Thank you in advance for your support. I look forward to your response. > > Best regards, > Olo. > > _______________________________________________ > USRP-users mailing list -- usrp-users@lists.ettus.com > To unsubscribe send an email to usrp-users-le...@lists.ettus.com >
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