[Discuss-gnuradio] AGC for PAM

I'm working on a BPSK demodulator, which I guess is a kind of PAM. The signal has some inherent ISI so I'm using Viterbi to decode it. It's working well in idealized conditions, but I'm a bit lost on how to get the amplitude right. It seems important that the amplitude is consistent (modulo noise)

Re: [Discuss-gnuradio] GNURadio in SUDO Mode?

On Thu, Jun 15, 2017 at 6:49 PM, Taylor Eisman wrote: > I've been having trouble writing a file to a folder on Linux - Ubuntu. > I've attached a screenshot of the error below. If you have any further > questions, please ask! > For the future — It's better to copy and

Re: [Discuss-gnuradio] GNURadio in SUDO Mode?

Oh, I forgot! Is it possible to run GNURadio in SUDO mode? I'm considering it a possibility that the reason it's getting hung up on this line is that of the lack of administrator rights. GNURadio was installed via the PyBOMBS method. Thanks, Taylor On Thu, Jun 15, 2017 at 6:49 PM, Taylor Eisman

[Discuss-gnuradio] GNURadio in SUDO Mode?

I've been having trouble writing a file to a folder on Linux - Ubuntu. I've attached a screenshot of the error below. If you have any further questions, please ask! Thanks, Taylor ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org

Re: [Discuss-gnuradio] TUN/TAP PDU not working

On 06/15/2017 08:15 AM, Mojtaba Mansour Abadi wrote: > Hi, > > These are the output of the commands: > > PC1: > > enp0s31f6 Link encap:Ethernet HWaddr f4:8e:38:b3:42:db > UP BROADCAST MULTICAST MTU:1500 Metric:1 > RX packets:0 errors:0 dropped:0 overruns:0 frame:0 >

Re: [Discuss-gnuradio] Clock recovery for BPSK with intentional ISI

Hi Phil: > Date: Thu, 15 Jun 2017 12:57:54 + > From: Phil Frost: > I am working on a receiver for the amateur radio mode PSK31[1]. It's BPSK > where the pulses are a raised cosine (impulse, not frequency domain) twice > the symbol duration[2], no error correction, at 31.25 baud. The

[Discuss-gnuradio] Connecting USRP N210s with loopback kit - Still not receiving packets at higher sampling rate (above 5 MHz)

Hi, I previously posted about the possibility of connecting USRPs with a loopback cable kit. I have connected the two USRPs with the loopback cable kit to eliminate the wireless channel and low SNR problem but I am still not receiving packets at higher sampling rates, anything above 5 MHz. It

[Discuss-gnuradio] pybombs gnuradio install error

Tried to install gnuradio on a fresh Ubuntu 14.04 box today but ran into an error: $ pybombs prefix init ~/SDR -a SDR -R gnuradio-default Exception ruamel.yaml.constructor.ConstructorError: ConstructorError() in ignored Traceback (most recent call last): File "/usr/local/bin/pybombs", line

Re: [Discuss-gnuradio] TUN/TAP PDU not working

Hi, These are the output of the commands: PC1: enp0s31f6 Link encap:Ethernet HWaddr f4:8e:38:b3:42:db UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0

Re: [Discuss-gnuradio] Clock recovery for BPSK with intentional ISI

I had messed with psk31 a while back. There's a gnuradio module to decode and some example GRC's to send and receive that I had used here: https://github.com/tkuester/gr-psk31 that may help you out. The flowgraphs in the examples directory already have all the blocks set up to receive. On

[Discuss-gnuradio] June 2017 Project Call

Hey all - This is just a reminder that our monthly project call is today at 1700 GMT (1300 EDT)! https://wiki.gnuradio.org/index.php/DevelopersCalls

Re: [Discuss-gnuradio] Clock recovery for BPSK with intentional ISI

Do you mean the equalization would be performed with another linear filter? matched filter -> equalizing filter -> clock recovery -> [...] Wouldn't that be equivalent of convolving the input responses of the two cascaded FIRs, with the net result being an unmatched filter? Existing

Re: [Discuss-gnuradio] Clock recovery for BPSK with intentional ISI

Hi, Nice problem you got there. In any case, have you considered performing matched filtering (thus maximizing SNR), outputting more than one sample per symbol (in fact, without decimation at all), then equalize (so that the signal looks as if it was sent and received with a squared-root Nyquist

[Discuss-gnuradio] Clock recovery for BPSK with intentional ISI

I am working on a receiver for the amateur radio mode PSK31[1]. It's BPSK where the pulses are a raised cosine (impulse, not frequency domain) twice the symbol duration[2], no error correction, at 31.25 baud. The transmitted signal has no ISI, but after matched filtering it does: [image:

[Discuss-gnuradio] contextual help is not visible in GRC

When I locate the pointer over some item it appears the contextual help, but it is not visible because of the colors. how can I change that? regards ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org

Re: [Discuss-gnuradio] GR-Inspector Installation problems

Hi Cinaed Many thanks, I tried the command: apt list | grep libqwt-dev and do already have version 6.1.2-6 amd64 installed. .. any other ideas please? Thanks,Neil. Neil2017 wrote > - trimmed from original to show errors. > > Hi all, I am attempting to install GR-Inspector for use with