Re: [Discuss-gnuradio] Fwd: Re: Transmission error

Thanks for the reply Marcus. I apologize for having asking these many times. Now I understand the transmission probability of the data packets in the real world. I have 4 USRP's that I am testing on , these benchmark scripts. I want to send the information from 1st USRP to 3rd USRP. Do I need to

Re: [Discuss-gnuradio] Fwd: Re: Transmission error

Hey all, The problem has been solved. I have just mentioned the -a (args) for the serial number. That's it. Thanks Regards, Dave On Sun, Oct 4, 2015 at 5:49 PM, Rama V wrote: > Thanks for the reply Marcus. I apologize for having asking these many > times. Now I understand

Re: [Discuss-gnuradio] Fwd: Re: Transmission error

Hey all, Thanks for the help. Now I am able to receive all the packets to be "ok=true" because of the USRP's being kept near.. The commands that I have set from the /digital/narrowband folder are Sender: ./benchmark_tx.py -p 4 -M 2 -f 2.43561G --tx-gain=28 -r 25 Receiver:

Re: [Discuss-gnuradio] Fwd: Re: Transmission error

Dave, you've been told this *several times* now: This is Radio communication. Every radio transmission has a certain probability of going right or wrong. You will never ever have a 0% bit error rate system under real world influences. It is *not* an indication of something being wrong when some

Re: [Discuss-gnuradio] Fwd: Re: Transmission error

Hi Dave, obviously 95% success means a 5% packet error rate. That sounds pretty physically sound -- for most constellations, you can calculate the symbol error rate from the SNR, and from the symbol error rate it's a matter of combinatorics to derive the lower boundary for packet error rate.

Re: [Discuss-gnuradio] Fwd: Re: Transmission error

Hi all, I have tried to send packets to the receiver from /digital/narrowband folder and it has mostly succeeded. The output I was able to get when I sent the following commands were Sender: ./benchmark_tx.py -p 4 -M 2 -f 2.43561G --tx-gain=28 -r 25 Receiver: ./benchmark_rx.py -p 4 -f

Re: [Discuss-gnuradio] Fwd: Re: Transmission error

Ok, > This is because I have changed my folder to /digital/ofdm, I have > started to receive packets. this means that you're using something *completely* different than before. It's simply a completely different transceiver system. > kindly advise if I need to figure out the combination settings

Re: [Discuss-gnuradio] Fwd: Re: Transmission error

Hi, As advised, the problem has been solved to a little extent where I have got the below results by giving the commands as Sender : ./benchmark_tx.py -f 2.435G --tx-gain=25 Receiver: ./benchmark_rx.py -f 2.435G --rx-gain 50 ok: True pktno: 1971 n_rcvd: 1687 n_right: 358 ok: False

Re: [Discuss-gnuradio] Fwd: Re: Transmission error

I have tried the following commands in the terminal Sender : benchmark_tx.py -f 2.435G -r 250k Receiver : benchmark_rx.py -f 2.435G But the data packets are not being sent correctly. I have been receiving the packets as ok=false. I have tried modifying benchmark python scripts. Can I do the

Re: [Discuss-gnuradio] Fwd: Re: Transmission error

Hi Dave, you shouldn't be modifying the python files before you understand what they do exactly. Please revert your edits, because it will be impossible to help you if you don't use the same scripts as we do, obviously. We've talked about this[1]. So: > Sender : benchmark_tx.py -f 2.435G -r 250k

Re: [Discuss-gnuradio] Fwd: Re: Transmission error

Thanks for the reply Michael. I will look into that as you have advised. So all you say is I need to change and play with the sampling rates and --tx-amplitude until the received packet becomes 'n_rcvd=1' and CRC check changes to 'ok=true' from the narrowband folder? Regards, Dave On Fri, Sep

Re: [Discuss-gnuradio] Fwd: Re: Transmission error

Hi Dave - I'm thinking that you are confusing "--samples-per-symbol" for the sample rate. I think the option you're looking for is "-r". Look at the "--help" for those examples when you get a chance. - MLD On Thu, Sep 17, 2015, at 02:01 PM, Rama V wrote: > Thank you very much Michael. I will

Re: [Discuss-gnuradio] Fwd: Re: Transmission error

Hi Rama/Dave - The benchmark examples run as standalone applications. They do require Python, but they do not use GRC or any other GUI interface. Question: Are you running the OFDM or Digital/Narrowband benchmark? What exact commands are you using for both Rx and Tx? What SDR hardware are you

Re: [Discuss-gnuradio] Fwd: Re: Transmission error

Thank you very much Michael. I will follow up on your advice. I am sorry that I wasn't able to understand some parts in GNU RADIO and didn't specify enough information. Regarding the question, I have been doing the benchmark in the digital/ narrowband/ folder. The exact commands I have been

Re: [Discuss-gnuradio] Fwd: Re: Transmission error

Do I need to use gnuradio - companion for transmission and reception of the data packets or the benchmark_tx.py commands from the terminal would be enough for that to happen. I am unable to sort out. Kindly help. Regards, Dave On Sep 16, 2015 2:59 PM, "Rama V" wrote: >