[USRP-users] Problem with the correlation value of OFDM frames

Hello everyone, I have a problem with OFDM frame detection for one of my channels. I work with gr-ieee802-11 blocks and receive from 4 channels using X300 and 2 TwinRX. For the frame detection, the receive blocks calculate the autocorrelation of the incoming stream over a specified window size and

Re: [USRP-users] RuntimeError: usb rx6 transfer status: LIBUSB_TRANSFER_ERROR

I have generally had to use external power with Odroids for B2xx. Sent from my iPhone > On Feb 17, 2018, at 8:02 AM, Marcus Müller via USRP-users > wrote: > > Hi Roman, > > sorry for the delay in getting back to you: > > Regarding the power consumption: I

Re: [USRP-users] B2x0 Timed Commands

Ooh, I forgot about the FPGA vs analog side. Thanks gents! On Sat, Feb 17, 2018 at 11:10 AM, Marcus Müller via USRP-users < usrp-users@lists.ettus.com> wrote: > To expand on that: timed commands do exist for all things that the FPGA > can control – that is: start/stop of sampling, DSP

Re: [USRP-users] I think my USRP2 is bricked, but how can I know for sure?

Hi Tim, You used the wrong device. Burn to the device as whole, not to a partition. Best regards, Marcus On Wed, 2018-01-31 at 11:39 -0700, Tim Sapio via USRP-users wrote: > Hello USRP-users, > > I have hit a snag uploading the images required to make my USRP2 > function. I will give a brief

Re: [USRP-users] Triggering between two transmitters

Hi Sumit, my first reaction would be to just merge the two flow graphs and do the collision in software – 100% isolated from changing environments and such. From a hardware perspective: you can use the PPS input on the B210 to set a synchronous time and then trigger transmitting on time stamps.

Re: [USRP-users] USING USRP Xseries as clock master

Hi Tarik, that REF out port is the 10 MHz clock, and you can choose the internal GPSDO as clock source[1]. Same goes for the PPS out port. Theoretically, you could "daisy-chain" your USRPs, but I wouldn't generally recommend that (we haven't characterized delay, and also, if you can, always avoid

Re: [USRP-users] add more than 10 blocks in uhd_image_builder

Snehasish, no. Best regards, Marcus On Mon, 2018-02-12 at 11:03 +, Snehasish Kar via USRP-users wrote: > Hello > > Is it somehow possible to add more than 10 gnu-radio blocks in > uhd_image_builder. > > BR > Snehasish > > ___ > USRP-users

Re: [USRP-users] Control LO frequency by FPGA

Dear Xingjian, that won't be possible as is – the tuning happens in the AD9361, and the FPGA communicates with that over a serial link. There's timing accuracy requirements that we can't meet over that serial link, so that's why Ettus' AD936x-based device can't support timed commands on the

Re: [USRP-users] B200 USB high CPU usage

Hi Kasper, SIMD is fine and all, for sample processing in the end (for example, to convert the samples from on-the-wire format to something your CPU can calculate with), but it's really no "fix it all" for this kind of thing: Significant workload is handling the fact that your USB controller has