[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Discuss-gnuradio] Suggestion to Improve Some Digital Modulations Recept
From: |
Firas A. |
Subject: |
[Discuss-gnuradio] Suggestion to Improve Some Digital Modulations Reception |
Date: |
Tue, 7 Jul 2009 08:14:52 -0700 (PDT) |
Hi,
I never used Gnuradio packets transmission blocks and even don't know how
the digital benchmark_?X.py work. But, today when I was explaining GNURadio
for some friends, I noticed that some digital modulations (for example GMSK)
reception can be improved by using a scrambling engine which is something I
used before many years ago to improve data reception circuitry performance.
The problem is raised when the digital source is producing a long sequence
of 0's or 1's. This will make the regeneration process more difficult at the
receiver. To solve this problem, I used 8 bit shift register with its input
derived from XOR which is fed from the source digital input and from a
second XOR. The second XOR takes its input from the 4th and 8th shift
register bits. Implementing this circuit as a GR block is easy and helpful.
Best regards,
Firas
--
View this message in context:
http://www.nabble.com/Suggestion-to-Improve-Some-Digital-Modulations-Reception-tp24375263p24375263.html
Sent from the GnuRadio mailing list archive at Nabble.com.
- [Discuss-gnuradio] Suggestion to Improve Some Digital Modulations Reception,
Firas A. <=