[Discuss-gnuradio] FW: Fwd: USRP Packet Decoder and Encoder

Having tried the several options from Derek and Mojtaba find myself lost still. To summarize I am trying to send a file, whether that be complex (Jpeg) or simple (txt) through a pair of USRP. To start with I created a single flow graph with bit conversion encoding and modulation, this works. I

[Discuss-gnuradio] Running gr-ieee 802.11 and gr-ieee 802.15.4 under same flowgraph (interference and co-existence)

Hello, (Its a long post :) as I want to give as much details as possible) Today I did a strange experiment. Under GNU Radio companion, I created a blank project. Then I copy pasted the wifi_loopback.grc from gr-ieee 802.11 to my blank project and made it run. Off course I took care of the initial

Re: [Discuss-gnuradio] Fwd: USRP Packet Decoder and Encoder

If you have access to the examples available in GNURadio package, please check: \examples\digital\packet Or \example\digital\demod The parameters are straight forward though. Samples Per Symbol for your case is 2. Filter Rollof Factor of 0.35 is fine. Prototype Filter Size of 44 or 45 does the jo

Re: [Discuss-gnuradio] Fwd: USRP Packet Decoder and Encoder

Hi Brian, Good work you attached the flowgraphs. My suggestion is to either 1- add an FLL Band-Edge block before the Polyphase Clock Recovery block at Rx; so your Rx side looks like this: USRP Source -> FLL Band-Edge -> Polyphase Clock Recovery -> CMA Equalizer -> ... Or 2- Instead of low lev

Re: [Discuss-gnuradio] NO DEVICES FOUND ERROR

Hello Muhammad, This is a question which is better for the usrp-users mailing list. http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com Ubuntu 10.04 reached end of life at the start of 2015. Many dependencies would need to be updated in order to install an updated UHD and GNU Radio

Re: [Discuss-gnuradio] Good SNR despite rotating constellation

Thank you so match for your detailed and accurate answers. I received a second answer from Phil Frost in which he explained my result. So now i am doing same thing with QPSK and 8PSK. Cheers, 2017-07-04 14:25 GMT+02:00 Phil Frost : > On Tue, Jul 4, 2017 at 6:30 AM Rafik ZITOUNI wrote: > >> C

Re: [Discuss-gnuradio] BER & SNR

Thank you so match for your detailed and accurate answers. I received a second answer from Phil Frost in which he explained my result. So now i am doing same thing with QPSK and 8PSK. Cheers, 2017-07-04 14:25 GMT+02:00 Phil Frost : > On Tue, Jul 4, 2017 at 6:30 AM Rafik ZITOUNI wrote: > >> C

[Discuss-gnuradio] NO DEVICES FOUND ERROR

Hi, I am using ubunto 10.04 and uhd 0.003.003.001 . but when i connect b200(NI 2901) i receive error ( No dvices found). I think i have old uhd version and my Ubunto is not supporting latest uhd. can i upgrade this old version using any command? ___ D

Re: [Discuss-gnuradio] Good SNR despite rotating constellation

On Tue, Jul 4, 2017 at 6:30 AM Rafik ZITOUNI wrote: > Could you give me an explanation how it was possible to obtain a good snr > and ber with a wrong constellation with good SNR and BER? > for BPSK the value of the bit is determined only by examining the sign of the real part. There will be er

Re: [Discuss-gnuradio] BER & SNR

BER is an observation, a count, not an estimation – it only makes sense to talk about a Bit Error Rate (BER) after a complete physical layer receiver, i.e. at the bit level. You can estimate the BER of a whole system if you know how it reacts to noise – but that's typically not what you do. Instead

Re: [Discuss-gnuradio] BER & SNR

My question is: How Is it possible to get a good estimation of the BER without a costas loop? 2017-07-04 11:39 GMT+02:00 Marcus Müller : > You're still not explaining what your question is – I really don't know > what to answer. > > What is wrong? > > On 07/04/2017 11:31 AM, Rafik ZITOUNI wro

Re: [Discuss-gnuradio] BER & SNR

You're still not explaining what your question is – I really don't know what to answer. What is wrong? On 07/04/2017 11:31 AM, Rafik ZITOUNI wrote: > Sorry I missed to add the flow graph. > Here is attached. > > 2017-07-04 11:29 GMT+02:00 Rafik ZITOUNI >: > > Ma

Re: [Discuss-gnuradio] BER & SNR (was: Re: (no subject))

Marcus, You find attached my flow graph with Tx and Rx. I know that it is not recommended to have TX and RX in the same flow graph but i did it just to obtain one view for my Tx and Rx. Thanks, 2017-07-04 11:23 GMT+02:00 Marcus Müller : > Dear Rafik, > > I think we're approaching this from the

[Discuss-gnuradio] BER & SNR (was: Re: (no subject))

Dear Rafik, I think we're approaching this from the wrong side: I don't think that I should be explaining why you get a good BER and SNR estimate, it is you who should explain why you're expecting something different, and then we can discuss! I'm not quite sure what I could be explaining at this p

Re: [Discuss-gnuradio] (no subject)

Thank you Marcus for your answer ! My BER and SNR are calculated and obtained using MPSK SNR Estimator Probe and Error Rate blocks. I obtained two points, which rotate in the qt gui constellation sink despite the BER and SNR have been obtained as expected. Could you give me an explanation how it

Re: [Discuss-gnuradio] USRP Packet Decoder and Encoder

Hi Brian, >From my experience, if packet decoder is not receiving any detectable preamble >bit sequence there will be no output. >From your email I realised that you’re receiving noise-like signal if decoder >is bypassed. So I also agree with Derek that either you probably are not >receiving an

Re: [Discuss-gnuradio] USRP Packet Decoder and Encoder

Hello Brian, It will be difficult to provide useful advice without seeing your flowgraph. Does your file correctly get written if you bypass the actual radios and simply connect the transmitter and receiver flowgraphs together? If it does then you probably need to add synchronization to your recei

Re: [Discuss-gnuradio] (no subject)

Hi Rafik! So, what's wrong with the BER and the SNR estimate? Best regards, Marcus On 07/03/2017 11:29 PM, Rafik ZITOUNI wrote: > 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

Re: [Discuss-gnuradio] Using two TwinRX in one x310

Hello Eugene, I've messaged our list admin and will get your membership on the usrp-users list confirmed. It is fully supported to use two TwinRXs in the same X310. Each DDC block in our default image has two signal paths, specifically to support the TwinRX. The X310 fundamentally always samples