[Discuss-gnuradio] GSoC 14 proposal on MIMO transceiver

I have submitted a proposal for GSoC'14 for MIMO transceiver implementation. It is made public and can be found at link: http://www.google-melange.com http://www.google-melange.com/gsoc/proposal/public/google/gsoc2014/navinanwani/5629499534213120 -Navin Anwani _

Re: [Discuss-gnuradio] GSoC 14 proposal on MIMO transceiver

Sorry, I mistakenly posted two links. Following is the correct one: http://www.google-melange.com/gsoc/proposal/public/google/gsoc2014/navinanwani/5629499534213120 Navin Anwani On Tue, Mar 25, 2014 at 3:13 AM, navin anwani wrote: > I have submitted a proposal for GSoC'14 for MIMO transceiver

Re: [Discuss-gnuradio] TX characterisation of USRPN210 with SBX daughterboard

I took a look at the SBX schematic. The final output uses a Mini-Circuits PHA-1+ MMIC amplifier that's rated at +22 dBm output power at 1 dB compression. It would seem that the gain distribution of the SBX is arranged so that the PHA-1+ cannot be overdriven, even at DAC full-scale and 0 dB attenu

Re: [Discuss-gnuradio] TX characterisation of USRPN210 with SBX daughterboard

On 03/24/2014 05:44 PM, Gayathri Ramasubramanian wrote: > Thanks for looking into my post. > I used a cable to connect to the spectrum analyzer ( united microflex > 150 with 15 db/ft attenuation, my cable length was 1 ft). However before > connecting to the spectrum analyzer, I had an attenuator se

Re: [Discuss-gnuradio] TX characterisation of USRPN210 with SBX daughterboard

Ron, thanks for the input! On 03/25/2014 12:02 PM, Ron Economos wrote: > I took a look at the SBX schematic. The final output > uses a Mini-Circuits PHA-1+ MMIC amplifier that's > rated at +22 dBm output power at 1 dB compression. > > It would seem that the gain distribution of the SBX > is arra

Re: [Discuss-gnuradio] GSoC 2014 Signal Visualization and Analysis

On 03/24/2014 11:00 PM, Dean Nida wrote: > I have to adjust my summer workload as my school has just made changes > to its course offerings this summer. My new course load is going to be > prohibitively time consuming and I will not be able to take part in > GSoC so I am withdrawing my proposal. It

[Discuss-gnuradio] Gnuradio blocks

Hello, Sorry to trouble you again. I'm having enough doubt to use gnuradio for what I want. The following happens: I need to know which block gnuradio the "back" signal to audio. Can anyone help me? Thanks and Regards, Rita Pessôa ___ Discuss-gnuradio ma

Re: [Discuss-gnuradio] Gnuradio blocks

What do you mean "back"? Does the signal you have is demodulated? If yes, you can just connect your signal source to the block called "Audio Sink". Best, Zhenhua 2014-03-25 21:00 GMT+08:00 Rita de Cassia Negromonte Pessoa < r...@cin.ufpe.br>: > Hello, > Sorry to trouble you again. I'm having en

[Discuss-gnuradio] Is a bug about stream_mux block?

Hi Experts, As follow is my program to test stream_mux block. I found when dat1_num+dat2_num > 8192, the result is wrong. Is there something I have made a mistake? My gnuradio version is v3.7.4git-35-g1092e685 #!/usr/bin/env python from gnuradio import gr from gnuradio import blocks if __name__ =

[Discuss-gnuradio] Is a bug about stream_mux block?

Hi Experts, As follow is my program to test stream_mux block. I found when dat1_num+dat2_num > 8192, the result was wrong. Is there something I have made a mistake? My gnuradio version is v3.7.4git-35-g1092e685 #!/usr/bin/env python from gnuradio import gr from gnuradio import blocks if __name__

Re: [Discuss-gnuradio] Pad block in ieee802_15_4_mac block

Thank you Bastian, I was about to try the transceiver example provided but I got an error from the message strobe block in grc. Param - Message PMT(msg): Value "pmt.intern("Hello World!\n")" cannot be evaluated: 'module' object has no attribute 'intern' that message is in utils/u

Re: [Discuss-gnuradio] Is a bug about stream_mux block?

On 03/25/2014 03:59 PM, Tiankun Hu wrote: > Hi Experts, > As follow is my program to test stream_mux block. I found when > dat1_num+dat2_num > 8192, the result was wrong. > Is there something I have made a mistake? There might be a bug in that block, although when you're streaming, it should work

Re: [Discuss-gnuradio] Pad block in ieee802_15_4_mac block

On 25 Mar 2014, at 16:51, Ruecan wrote: > > Param - Message PMT(msg): > Value "pmt.intern("Hello World!\n")" cannot be evaluated: > 'module' object has no attribute ‘intern' I never got that error, but it looks like a problem of your GNU Radio installation. What version do you ha

[Discuss-gnuradio] How to calculate SNR?

Hi All, In order to calculate the SNR at the receiver, I have generated a QPSK signal, sent it with an USRP through a canal and then received it with another USRP. So, I have used The "MPSK SNR Estimator" block at the receiver to monitor the SNR values. But values are not correct, I have tried "MP

Re: [Discuss-gnuradio] Pad block in ieee802_15_4_mac block

Bastian Bloessl-2 wrote > I never got that error, but it looks like a problem of your GNU Radio > installation. What version do you have installed and how did you install > it? I am running GNU Radio 3.65, may be that block is not yet in the release. Bastian Bloessl-2 wrote >> that message is in

Re: [Discuss-gnuradio] Pad block in ieee802_15_4_mac block

On 25 Mar 2014, at 19:30, Ruecan wrote: > Bastian Bloessl-2 wrote >> I never got that error, but it looks like a problem of your GNU Radio >> installation. What version do you have installed and how did you install >> it? > > I am running GNU Radio 3.65, may be that block is not yet in the rel

Re: [Discuss-gnuradio] Is a bug about stream_mux block?

On 03/25/2014 06:15 PM, Martin Braun wrote: > On 03/25/2014 03:59 PM, Tiankun Hu wrote: >> Hi Experts, >> As follow is my program to test stream_mux block. I found when >> dat1_num+dat2_num > 8192, the result was wrong. >> Is there something I have made a mistake? > > There might be a bug in that

Re: [Discuss-gnuradio] Performance drop with upgrade to 3.7

Thanks - I am running an quad-core Intel I5 laptop. It is running Ubuntu 13.10. I also have it running on a VM on my 8 Core I7 Macbook. Do you have any pointers or links on using oprofile with gnuradio? I found some material on using GR Performance Counters, but I haven't had a chance to try. I a

Re: [Discuss-gnuradio] How to calculate SNR?

On 03/25/2014 05:00 PM, Azza Ben Mosbah wrote: > In order to calculate the SNR at the receiver, I have generated a QPSK > signal, sent it with an USRP through a canal and then received it with > another USRP. > So, I have used The "MPSK SNR Estimator" block at the receiver to > monitor the SNR val

Re: [Discuss-gnuradio] SNR estimator block output problem

On Mon, Mar 17, 2014 at 10:36 AM, zielalaoui wrote: > Hi all, > I try to create a new block able to generate integer values depending on the > output values giving by the SNR estimator block (already available in > Gnuradio library). Normally the estimator black should give the SNR in dB so > a fl

Re: [Discuss-gnuradio] How to calculate SNR?

Hi azza and Martin, I have the same problem, that is my flowgraph. The SNR values have not sens. For example, with 0.065 transmitting power i had values between 0.06 and -0.012. may be the problem is how to use the block in the flowgraph. I

[Discuss-gnuradio] 802.15.4 transmitted signal structure

Hello GR, Is there any one who has monitored the signal generated by transceiver.py related to the 802.15.4 implementation. I want to understand the meaning its structure. I find out that it consist of a bursty transmission of a signal compound of 11 to 12 msec of wide-band signal followed by a n

[Discuss-gnuradio] Gnuradio binaries dependencies / conflict - build uhd_003.007.000-1-stable_Ubuntu-12.04-x86_64 gnuradio_3.7.2.1-77_Ubuntu-12.04-x86_64

Hi gnuradio guys, I just tried to install gnuradio binaries from Ettus stable build: http://files.ettus.com/binaries/gnuradio/gnuradio-stable_2014-02-25/ My OS is Ubuntu 12.04.4 LTS / x86_64. In order to be able using a printer driver, I had to install support for 32 bits programs, with ia32-lib

[Discuss-gnuradio] flowgraph reading keystrokes during execution

Dear Sir, I am thinking of building simple chat application using gnuradio. PC#1 connecting to USRP#1, will send text message to PC#2 via USRP#2. The question is, how to get the user keystrokes from the flowgraph at PC#1 ? I am building the flowgraphs using GRC (Companion). I guess I need to use

Re: [Discuss-gnuradio] 802.15.4 transmitted signal structure

> I find out that it consist of a bursty transmission of a signal compound of > 11 to 12 msec of wide-band signal followed by a narrower 400 Khz signal that > lasts around 10 msec and is 20 db stronger then the wide-band signal. The wideband signal is the packet. Actually, it should be terminated

[Discuss-gnuradio] Command terminated by signal 11

Hello I am running my code in Python using Gnuradio and USRPs. The program is supposed to work continuously till an interrupt is given. The code works well for 10-15 iterations and then terminates stating "command terminated by signal 11". What could be the possible reason behind it. I tried to go