[Discuss-gnuradio] Reg. AGC3 in gnuradio

2013-09-19 Thread vamshi krishna dodla
Can someone give me detailed information about the new agc (agc3) in
gnuradio?.Also is that agc a log mag. loop which is normally used in the
modern receivers?If there is a block diagram of the new agc3 then it would
also help. Thanks ahead.

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Thanks  Regards
Vamshi
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[Discuss-gnuradio] Regarding exponential operator in gnuradio

2013-06-10 Thread vamshi krishna dodla
Hi all, does gnuradio have an exponential operator (like e^jw). If not how
to implement it in gnuradio.


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Vamshi Krishna Dodla
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[Discuss-gnuradio] reg. PSK Mod Block in Gnu radio

2013-06-10 Thread vamshi krishna dodla
http://gnuradio.squarespace.com/storage/tutorial/rondeau-costterra2.pdf


Hi all, why does the output of PSK Mod block is imperfect, compared to
theoritical QPSK constellation.( iam implementing qpsk with 4 sampl/sym and
4 constellation points).The experiment im doing is the same in link (
http://gnuradio.squarespace.com/storage/tutorial/rondeau-costterra2.pdf).


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Vamshi Krishna.
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[Discuss-gnuradio] how to get started with python in gnuradio

2013-06-09 Thread vamshi krishna dodla
Hi all
It would be very helpful to me if some one tells me how to get started with
python in gnu radio.I see an entire page dedicated to python programming
but it does not say anything about getting started.Please don't say to
use#!/usr/bin/env/python part
in that page.Any link to how to get started with an example would be
helpful.



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Vamshi Krishna Dodla
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[Discuss-gnuradio] tx rx using 2-usrp N210 and RFX2400 setup

2013-05-28 Thread vamshi krishna dodla
I am new to the gnu radio community, and want to know how my set up works
over the air. I am using GNU Radio and 2- usrp N210's with RFX2400. Can
some one provide an example .grc files for a digital modulation (like qpsk)
so as to verify over the air transmission.I need to know how UHD works and
how USRP's connect from tx pc to rx pc. Any replies with examples would be
helpful.

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Krishna
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[Discuss-gnuradio] Reg. Calit2

2013-04-19 Thread vamshi krishna dodla
Hi

Is anyone working in california institue for telecommunications and
information technology, UCSD ? If anyone has worked or have been working
please let me know i have a couple of questions.




Thanks
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[Discuss-gnuradio] Reg. Frequency response function in interpolator

2013-04-05 Thread vamshi krishna dodla
Hi I need some information regarding frequency response function in the
interpolator, does that use 1/f roll off or does it use the remez rolloff ?

If it uses 1/f roll off i need some info on how it is done.Kindly provide
me some documentation, as lack of the necessary info is hindering my
project.



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[Discuss-gnuradio] Need help

2013-04-03 Thread vamshi krishna dodla
can some one send me a flow graph of QPSK transmitter and receiver, this
flow graph should include a root raised cosine filter, qpsk generator,
multipath channel, additive gaussian noise source, snr estimator and feed
back, interpolator, carrier recovery using bandedge filters, timing
recovery using poly phs clock sync, lms equalizer, coastas detector.

I tried doing the same but having hard time executing the flow graph.
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[Discuss-gnuradio] (no subject)

2013-04-01 Thread vamshi krishna dodla
I have some questions regarding the coastas loop implemented, does it also
consider the snr estimate too? like a Maximum Likelihood loop(tanh* snr).
Also can you suggest me any interpolator for timing recovery and also
polyphase bandedge filters implementation. This would be really helpful to
me.As there is very little material available online, also as you are
experts in these fields your guidance will be very useful
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