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 enough
machine is added;
5.The structure of flow graph is changed; 6.New deliverable list and
schedule; 7.More references.
8.Deleted the words of promising some tasks after GSoC.
2014-03-16 15:27 GMT+08:00 zhenhua han hzhua...@gmail.com:
Hi,
My proposal has been updated on github.
The proposal has
.
4.The schedule has been changed according to the new architecture.
Looking forward to further advises :)
Best wishes,
Zhenhua
2014-03-13 21:12 GMT+08:00 zhenhua han hzhua...@gmail.com:
The figure in the previous mail is incorrect.
It is too weird that the ratio is so low and with narrow
correct.
I have updated this part in my proposal. Sorry for my mistakes.[image: 内嵌图片
1]
Best,
Zhenhua
2014-03-13 11:27 GMT+08:00 zhenhua han hzhua...@gmail.com:
Oh, I forgot to say. The data is sampled by a RTL-SDR.
Zhenhua
2014-03-13 11:25 GMT+08:00 zhenhua han hzhua...@gmail.com:
Hi
Thank you, Martin.
I will check these and extend my proposal with more details.
Best wishes,
Zhenhua
2014-03-11 17:00 GMT+08:00 Martin Braun martin.br...@ettus.com:
On 03/11/2014 04:40 AM, zhenhua han wrote:
Hi all,
As Martin Braun noticed in the mail list yesterday, I haven't open my
-- Forwarded message --
From: zhenhua han hzhua...@gmail.com
Date: 2014-03-11 16:00 GMT+08:00
Subject: Re: [Discuss-gnuradio] Proposal for GSoC on gr-gsm
To: Bogdan Diaconescu b_diacone...@yahoo.com
Thank you, Bogdan. Your work is a great help in developing the channel
hopping
Hi all,
As Martin Braun noticed in the mail list yesterday, I haven't open my
proposal here.
Here is the link:
https://github.com/hzhua/grgsm_proposal
If you have any suggestions, please don't be hesitate to contact me.
Thanks to Sylvain Munaut for his help on reviewing my first draft.
Thanks
(Device Under Test). It may possible that due to non-linear
characteristic of the device, there are changes in frequency and amplitude
of signal. In this case the method you mentioned will give correct phase?
Thanks
Mitul Vekariya
On Wed, Mar 5, 2014 at 7:46 AM, zhenhua han hzhua...@gmail.com
Hi,
How can we measure phase between two sine waves using FPGA?
Supposing the two sine waves have the same frequency.
For two discrete complex signals, v1 and v2. we can compute the phase
difference as follow.
v3 = v1 * conj(v2)
phase diff = arctan(imag(v3) , real(v3))
(conj() means
. Can
anyone help me to find out the derivation ?
Best wishes,
Zhenhua
2014-03-04 9:28 GMT+08:00 zhenhua han hzhua...@gmail.com:
Hi Perper,
I took a look at your code, and I found this
//set_frequency(d_freq_offset);
It seems you have turned off the the frequency offset correction as you
2014-03-04 9:32 GMT+08:00 zhenhua han hzhua...@gmail.com:
Hi guys,
I'm reading the code of Airprobe and I found this function.
double gsm_receiver_cf::compute_freq_offset(const gr_complex * input,
unsigned first_sample, unsigned last_sample)
{
double phase_sum = 0;
unsigned ii
Hi,
As I have known, GSM uses GMSK modulation which BT = 0.3 and it
uses Viterbi algorithm for demodulation. And I took a look at the code of
GMSK demod code in GNU Radio, it use quadrature_demod but not Viterbi as
demodulation method. So which one is better in doing demodulating GMSK?
Moreover,
What confused me is the Viterbi algorithm. I saw it can be used to
demodulate GMSK in more than one place (such as here:
http://www.mathworks.cn/cn/help/comm/ref/comm.gmskdemodulatorclass.html )
I think it's better for me to read some materials of Viterbi and find out
what really it is.
Cheers
Hi guys,
I'm reading the code of Airprobe and I found this function.
double gsm_receiver_cf::compute_freq_offset(const gr_complex * input,
unsigned first_sample, unsigned last_sample)
{
double phase_sum = 0;
unsigned ii;
for (ii = first_sample; ii last_sample; ii++) {
double
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