[Discuss-gnuradio] Last call for abstracts for the IEEE Aerospace Conference!

Hello fellow SDR developers. I am still accepting abstracts for the SDR session at the Aerospace Conference to be held next March in Big Sky, MT. Let me know if you are interested in submitting a paper (only abstracts are required right now), or just go to aeroconf.org. Session 4.12. Hope

[Discuss-gnuradio] Using two TwinRX in one x310

Hello, This may be an usrp-users question, but I can't seem to get approved for that list. Is it possible to use two TwinRX boards (4 channels) in a X310? As far as I can tell you need 4 DDCs, but only two are available by default. A followup: why is it that TwinRX connection type is

Re: [Discuss-gnuradio] Lunar imaging experiment

We're transmitting two linear polarizations interleaved. Any polarization should work. Two independent linear polarizations will give optimal results when producing a map (one can form polarized and depolarized images). Here's a link to the radar: http://jro.igp.gob.pe/english/ juha On Mon,

Re: [Discuss-gnuradio] Lunar imaging experiment

Cool! Is there an optimal receive antenna polarization? Michael On Mon, Jul 03, 2017 at 10:07:03PM +, Juha Vierinen wrote: > > Hi, > > I forgot to mention that the interpulse period is 38 ms on 2017/07/04 at > 01:21:00 UTC and 40 ms on 2017/07/05 02:04:00 UTC. > > juha > > > On Mon,

[Discuss-gnuradio] USRP Packet Decoder and Encoder

I have a flow graph that currently has a packet encoder at the transmitter and an encoder at the receiver. I am attempting to send a file from one usrp to the other. On investigating the output of the receiver it would not appear that it is processing anything possibly because of the access

Re: [Discuss-gnuradio] Lunar imaging experiment

Hi, I forgot to mention that the interpulse period is 38 ms on 2017/07/04 at 01:21:00 UTC and 40 ms on 2017/07/05 02:04:00 UTC. juha On Mon, Jul 3, 2017 at 9:58 PM, Juha Vierinen wrote: > Hi, > > Just to let you guys know, I'll be radiating the moon with 1 MW and 36 dBi

[Discuss-gnuradio] Lunar imaging experiment

Hi, Just to let you guys know, I'll be radiating the moon with 1 MW and 36 dBi 49.92 MHz on 2017/07/04 at 01:21:00 UTC. The experiment will repeat also at 2017/07/05 02:04:00 UTC. Both experiments last about 15 minutes, when the Moon transits the radar beam. In case somebody wants to tune in

[Discuss-gnuradio] (no subject)

Dear all, I translate the /gr-digital/examples/narrowband/digital_bert_tx.py and the /gr-digital/examples/narrowband/digital_bert_rx.py python source codes to GRC flow graphs. The objective is to get more graphical possibilities with a GRC. My flow graph gives a fine result of BER and SNR for

Re: [Discuss-gnuradio] USRP phase to sample index relation in the DDC/DUC chain

Hello Nicolas, sorry for the delayed reaction! So, the signal chain looks roughly like this: RX: ADC (@Master Clock Rate (MCR) --> Rotator (@MCR) --> decimator --> Host (@user-requested sampling rate) TX: Host (@user sampling rate) --> interpolator --> Rotator (@MCR) --> DAC (@MCR) The two

Re: [Discuss-gnuradio] usrp x310 full duplex: receiving flowgraph can cause underflow problem at transmitter side

Hello Yang, it is true that each block will have its own thread in GNURadio, but, in any case, your resources are limited when it comes to CPU processing. What seems to be happening is that one of your paths is demanding resources and, when it gets them, leaves the other path without enough

Re: [Discuss-gnuradio] Automating Transmit Gain

Hello Tellrell, the description that you are making as a possible solution to your problem sounds very reasonable in many ways. As an informative example for the command messages. you can check the "uhd_msg_tune.grc" example in gnuradio/gr-uhd [1] where the uhd control over message is shown. A

Re: [Discuss-gnuradio] GRC GUI parameters for custom blocks

Hi Vipin. 2017-07-02 23:12 GMT-05:00 Vipin Sharma : > Thanks Cristian. > > I understand the runtime part. What if I don’t want the parameters to > change during runtime. I just want to do some initial initialization > through GUI for some parameters. > The GUI is