Joseph Crowley wrote:
> Hey,
> I'm trying to develop a alamouti receiver (2Tx to 1Rx antenna system), and i
> am hoping that there is already a module somewhere that has been created for
> channel estimating. I had a look through the module list but was unable to
> see any.
>
If you are usin
>
> **#**
> PROGRAM ENDS
> **#**
> what i had undestood is that it is because my PC's sound card
> sampling rate was
Hello friends,
I(shijesh) made debute to USRP & GNUradio a few days back.
I have a querry as mentioned after the environment observations given below
My environment is :
O.S::Ubuntu 7.04 Feisty
Ok, so this is going to sound really weird, but please bear with me.
For the last several evenings, at exactly the same time, my radio
astronomy receiver has been receiving a series of square waves,
of amplitude about 100Jy (large by radio astronomy standards, tiny by
anybody else' measure of su
Never mind. My math mind is as bad as yours today. There is 150 Hz of
separation between what I assume is the 3 dB points.
Sorry
Bob
Robert McGwier wrote:
The adjacent channel interference will be horrendous since one channel
overlaps the next door neighbor by 50 Hz.
Bob
Eric Blossom w
The adjacent channel interference will be horrendous since one channel
overlaps the next door neighbor by 50 Hz.
Bob
Eric Blossom wrote:
On Thu, Sep 06, 2007 at 11:56:30AM -0400, Jeffrey Karrels wrote:
Ok. I am having a world of problems today, the main one being
determining if it is my issu
Hey,
I'm trying to develop a alamouti receiver (2Tx to 1Rx antenna system), and i am
hoping that there is already a module somewhere that has been created for
channel estimating. I had a look through the module list but was unable to see
any.
Thanks,
Joseph Crowley
__
The python code couldn't find it when executing "from gnuradio import
usrp".
I checked /usr/local/lib64/python2.4/site-packages/gnuradio and
couldn't find it either. Did I use the wrong package?
david
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The comment for the filters gr.freq_xlating_fir_filter_XXX says (about
the parameter "center_freq"):
/*!
* Construct a FIR filter with the given taps and a composite frequency
* translation that shifts center_freq down to zero Hz. The frequency
*
Something you may want to try to do is focus on the TX side of things.
RX is generally the harder part of radio communications, and probably
wouldn't work out too well inside of an FPGA that is already pretty
full. TX on the other hand is all just simple permutations, look up
tables, and maybe so
Hi,
Thank you Lee for your response.
I am not sure about the current status of OFDM implementation. I figured out
from the mailing list that it is still in testing phase.
Would it be a good idea to port some of the OFDM implementation onto the
FPGA.?
I am just starting off with USRP and would g
>
> In this example (and indeed, in the code for the analysis_filterbank),
> we divide a 1MHz band exactly into 25 kHz channels. However, the
> channels at the edge will be attenuated (cite: Matt's email of yesterday
> 12:11 AM PST). I therefore oversampled the desired passband by 33%,
> which cau
All,
As part of some thesis research, I've made a stand-alone
oscilloscope/spectrum analyzer that also shows AM and FM demodulated
signals, using the gnuradio C++ libraries. It uses QT, and the output
looks very pretty, being anti-aliased and such. You can also grab
screenshots from it by pressi
On Thu, Sep 06, 2007 at 11:56:30AM -0400, Jeffrey Karrels wrote:
> Ok. I am having a world of problems today, the main one being
> determining if it is my issues causing the headache or the headache
> causing the issues. ;)
>
> I have a basic bandwidth limit that I am hitting and for some reason I
Ok. I am having a world of problems today, the main one being
determining if it is my issues causing the headache or the headache
causing the issues. ;)
I have a basic bandwidth limit that I am hitting and for some reason I
cannot do basic math today.
I am trying to see how many carriers I can tr
This week's LWN has a nice writeup on GNU Radio. It is currently a
subscriber-only content and will be available for the rest of the
folks next week.
http://lwn.net/Articles/247347/
Ramakrishnan, VU3RDD
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