Hi all,
I managed to find out the reason why error rate module cannot work. Just
want to share my thoughts and hopefully it can help other guys when they
want to do similar simulation.
As cited in my previous post below, I tried to evaluate the BER performance
using GRC for DPSK modulation and de
There isnt any QA code for QAM modulator or demodulator.
They do not work for me.
I think if they worked, then their would be QA code.
On Sat, Dec 14, 2013 at 12:08 PM, Henry Jin wrote:
> Hi Wayne
>
> I agree with every point you mentioned in your reply. For the variable
> Bits per symbol, that
Hi Wayne
I agree with every point you mentioned in your reply. For the variable Bits
per symbol, that was a mistake since I previously used it to test QAM.
So, have you tested QAM? In my test, the two files didn't match as
discussed in my previous post. Just curious about why this mismatch can
ha
I i try that DQPSK schema myself, but i notice that in your image you have
Bits per symbol in packet encoder set to 4, but the help of packet encoder
says 2 for DQPSK.
I try 2, and i get no errors until the end, probably because of file
buffering.
--- sent.hex2013-12-14 10:11:41.308775941 -080
Hi all,
As per previous discussions, I have changed my design as shown in the link
https://www.dropbox.com/s/8pw27f29qf5unuq/Screenshot%20from%202013-12-08%2021%3A39%3A05.png
This time, QPSK and BPSK both works as I compared the files generated.
However, I found two more problems:
1. When Error R
Thanks for your effort in trying to help, Michael. I will continue to study
and if I managed to get it working, I will keep you updated.
Henry
On Thu, Dec 5, 2013 at 2:23 PM, Michael Berman wrote:
> Henry,
>
> I looked at this and some of the underlying code, and tried to run your
> example wi
Henry,
I looked at this and some of the underlying code, and tried to run your
example with some modifications, but all to no avail as to what you are
attempting to do. Last time I did anything like this I ended up using the
mod_pkts code (found in gr-digital/python/digital/pkt.py). Maybe there
On Wed, Dec 4, 2013 at 12:13 PM, Michael Berman
wrote:
> Looking at your flowchart in the original post, you have an Unpacked to
> Packed block after the demodulator, with bit's per symbol of 1. This
> doesn't seem right to me. I have never tried this with a random source
> like you have it se
Looking at your flowchart in the original post, you have an Unpacked to
Packed block after the demodulator, with bit's per symbol of 1. This
doesn't seem right to me. I have never tried this with a random source
like you have it setup, however there should be an Unpacked to Packed block
prior to
On Wed, Dec 4, 2013 at 12:52 PM, Henry Jin wrote:
> I tried again replacing the DPSK module with PSK module. Still cannot get
> the correct data. The parameter for Error Rate "Bits per Symbol" is changed
> to 8 since every bit carries information in my flow. The sizes of the files
> from the two f
I tried again replacing the DPSK module with PSK module. Still cannot get
the correct data. The parameter for Error Rate "Bits per Symbol" is changed
to 8 since every bit carries information in my flow. The sizes of the files
from the two file sinks are exactly the same, except with different data.
Can you try using the PSK mod/demod blocks with differential=Yes instead of
the DPSK mod/demod blocks? I found an issue today with the DPSK mod/demod
blocks which results in them not actually using differential encoding.
--n
On Tue, Dec 3, 2013 at 9:00 PM, Henry Jin wrote:
> Hi,
>
> I tried to
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