Hi,
Does this happen to anyone using BBN code (USRP2 version) with
gnuradio-3.3.0, that only when I set the decimation factor to 4, I see the
most of the beacon messages sent from the APs around the lab at 1Mbps
captured, otherwise, I hardly see half of the beacons sent (I compare the
capture wit
Hello list,
I have been fiddling around with USRP2 version of BBN code for a week now.
First, one observation I found is: if and only if I set decimation to 4
(i.e., 25Msps), I see almost all of the 1Mbps packets sent by my 802.11
sender. This includes data packets (1400 bytes payload), and
IEEE8
On Thu, Nov 18, 2010 at 3:43 PM, Josh Blum wrote:
>
>Thank you for your answers. For this second answer, I didn't understand
>> your reply. The link you sent does not say anything about how to set the
>> TX/RX to J1/J2. It just says it could be set to either one. My question
>> is,
>> is ther
>
> 2. I am using XCVR2450 with USRP2. I initially just wanted to find out
>> which
>> antenna (J1 or J2 -- connected to RF2 and RF1 in my USRP2 respectively),
>> was
>> defined to be RX and which one to be TX? I found out from a file
>> "db_xcvr2450.cc" that J1 was defined to be RX and J1-TX, howe
I have two small questions...
1. I successfully installed UHD (gr-uhd) following the guide "
http://www.ettus.com/uhd_docs/manual/html/usrp2.html";
But now, I want to be able to switch back and forth between the UHD and
Raw-Ethernet Driver. Do I need to uninstall the UHD, or just using (burni
ts of APs broadcasting few too many beacons?
Thank you once again.
On Thu, Nov 11, 2010 at 5:47 PM, Eric Blossom wrote:
> On Thu, Nov 11, 2010 at 04:57:56PM -0500, Bishal Thapa wrote:
> > Hello,
> > I am using USRP2 version of BBN code to look at AP beacons as seen by
> t
Hello,
I am using USRP2 version of BBN code to look at AP beacons as seen by the
USRP2 host. There is lots of "S" printing going on, which keeps me from
reading AP beacon information from STDOUT (unless I save the output to a
file, which I prefer not to). Is there anyway to enforce the printing o
Quick Question..
Is there a reason you do not want to use time.sleep(). Just curious?
On Sun, Aug 29, 2010 at 8:27 PM, Venkat Vinod wrote:
> Hello All,
>
> I am having some difficulties implementing a cognitive receiver program
> that involves dynamically reconfiguring the USRP between sensing
B.connect(gr.vector_source_c([],True), B.multiply_const_cc(), usrp_sink_c).
Sorry
On Sun, Jul 25, 2010 at 5:22 PM, Bishal Thapa wrote:
> Hi,
> I have one last question for today :). I have a GNURadio Python
> application that runs two gr.top_block() flow graphs simultaneous
Hi,
I have one last question for today :). I have a GNURadio Python
application that runs two gr.top_block() flow graphs simultaneously on two
different daughterboards (RFX2400). My dream is that B is running forever
(using B.run()) sending a continuous series of complex numbers with the
followin
Great. Thank you. Just wanted to double check.
On Sun, Jul 25, 2010 at 2:48 PM, Thomas Tsou wrote:
> On Sun, Jul 25, 2010 at 12:45 AM, Bishal Thapa
> wrote:
> > Hi GNURadioers,
> > I have a quick question. I am trying to use USRP running gnuradio-3.3.0
> > with two d
estion?
Sincerely,
On Sun, Jul 25, 2010 at 3:45 AM, Bishal Thapa wrote:
> Hi GNURadioers,
> I have a quick question. I am trying to use USRP running gnuradio-3.3.0
> with two daughterboards... RFX2400. I am going to use one daughterboard to
> receive and another to transmit. Do
Hi GNURadioers,
I have a quick question. I am trying to use USRP running gnuradio-3.3.0
with two daughterboards... RFX2400. I am going to use one daughterboard to
receive and another to transmit. Do I use the standard firmware that is
loaded by default, std_2rxhb_2tx.rbf or is there a std_1rx_1t
som wrote:
>
>> On Sun, Mar 07, 2010 at 04:07:58PM -0500, Bishal Thapa wrote:
>>
>>> Thank you for your reply Eric.
>>> I did print delta and delta.microseconds and guess what I did get this:
>>>
>>> Receiver (0) = BABA0002
>>> Re
not get 309us? I am sorry if I don't get something
fundamental here. Thanks again for helping me out :)
On Sun, Mar 7, 2010 at 3:15 PM, Eric Blossom wrote:
> On Sun, Mar 07, 2010 at 02:05:12PM -0500, Bishal Thapa wrote:
> > Hi,
> > I have an interesting observation to shar
Hi,
I have an interesting observation to share, and I want to see if anybody
can help me shed some light. When I measure time in python in the following
way:
t1 = datetime.now()
self.start()
t2=datetime.now()
diff = t2.microsecond - t1.microsecond
print "Difference %d", diff
I get very differen
Hi,
I have a quick question regarding the complex binary samples captured by
using usrp_rx_cfile.py. I would like to draw them against time. So,
(Magnitude on Y-axis and Time on X-axis) in matlab. I was able to do the
following
1. ./usrp_rx_cfile.py -f 2.5G capture.dat
2. d = read_complex_binary(
Sorry, if I emailed this twice. I was confused if I had to subscribe to the
list first, before I could post questions. It was not clear from the website
http://www.gnu.org/software/gnuradio/mailinglists.html
--My
inquiry---
Dear GNURadioers,
I am doing some experiment to calculate BER (Bit error rate) with GNuradio
version 3.2.2 on Ubuntu 9.04. I run sender and receiver using two programs
as follows:
1. Receiver:
./benchmark_rx.py -f 2.5G -d 128 -m dbpsk
2. Sender:
./benchmark_tx.py -f 25G -i 256 -m dbpsk -
Dear Thomas and Tim,
Thank you for replying all my questions previously. I have another
question for the list. Hope you don't mind. I wrote a demod for dbpsk. I had
to because I am spreading/despreading packets using dbpsk modulation. DBPSK
demod turned out pretty easy, except I committed a serio
ing a full packet in that case, and it will look
> like packet loss.
>
> Tim
>
>
> Bishal Thapa wrote:
>
>> Dear Eric, Jonathan, List
>> I am stuck in a simple problem, and I am wondering if I understand what
>> "-B FUSB_BLOCK_SIZE" and "-N FUSB_
Dear Eric, Jonathan, List
I am stuck in a simple problem, and I am wondering if I understand what
"-B FUSB_BLOCK_SIZE" and "-N FUSB_NBLOCKS" options do, then it MIGHT help a
little bit.
I am using benchmark_tx.py to send a payload of size 102 bytes, but with
added header, CRC, padded "0x55"s
Dear list,
I have a question. I just want to make sure I am not hallucinating infront
of my comp here. I run this script as follows:
1. ./usrp_rx_cfile.py -f 2.4G -d 128 foo.dat @ the receiver
=> I get, the bitrate set to 500k
But, when I run this script as follows:
2. //benchmark_rx.py -f 2.4G
Dear list,
I have one question regarding the samples captured using usrp_rx_cfile.py
at the receiver. Is there anyway that I let the usrp_rx_cfile.py run
forever, and it will keep on capturing samples through USRP forever, while I
keep on taking out 10K samples (lets say) at a time from that "con
Dear Michael and Jakub,
I was working on the similar problem. What about using two TX daughter
boards in the same motherboard, and BOTH TRANSMITTING signals
simultaneously, one from each daughter board, but in an "overlapped"
fashion. Is it easily possible? What I mean is, I would like to have two
Hi,
I am worried this might be a very stupid question, but is it possible for
a personalized application of gnuradio that I am developing, I change the
1500 (approximately) bytes limit on the payload before the packets get
fragmented. If it is possible, could you please give me few pointers. I am
Dear all,
Please help me understand this output from usrp_rx_cfile.py. I have
attached the plot as the jpeg at the end:
1. I send a file with 1500 bytes of spaces (Space = 0x20 = 0010 in
binary)
2. I use usrp_rx_cfile.py to capture the samples, and focus in on roughly
24600 samples (because
Hi,
I am a newbie to Matlab and less experienced (not a newbie anymore :)) in
GNUradio. I have a quick question. How can I load rx_unpack.dat in the
Matlab. The simple "load" function didn't work. Most probably it is because,
it has to be read in "one byte at a time" format? Thank you.
__
Hi All,
I am using ./benchmark_tx.py -f 2.4G to send some bytes from my own input
file, and using ./usrp_rx_cfile -f 2.4G to receive the downconverted complex
baseband samples. The modulation I am using on the sender side is dbpsk.
Then, I use
read_complex_binary.m to read the samples into the ma
Dear Gnuradio,
I had two questions..I did spend some time searching for my answers in the
mailing list and couldn't find "if already discussed" solutions. Please
forgive if so.
Q.1. TX side: I simply want to take a packet and XOR each bit of the packet
with a PN-code (hint: final goal will be to
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