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[Discuss-gnuradio] GPS signal generator
From: |
caruiz.ext |
Subject: |
[Discuss-gnuradio] GPS signal generator |
Date: |
Mon, 31 Mar 2014 17:08:09 +0200 |
User-agent: |
Roundcube Webmail |
Hello,
I am developing a GPS generator GRC. I use this block diagram:
http://i1281.photobucket.com/albums/a515/Carlos_Alberto_Ruiz_Naranjo/GPS_zps3ce4af88.png
- C / A code. 1023 Samples, Sample rate: 5.1151Msps, interpolation
Repeat 5 -> 977.5e-9 s each chip. (1,023 MHz)
- Navigation data. Sample rate: 5.1151Msps, Repeat interpolation:
102302 -> 0.02 s each chip. (50Hz)
But I have a question. The L1 signal is, so I do not use the P-Code.
What should I use in the complex block? Any random source, a null
constant source?
Is it right to my block diagram?
* My C / A code spectrum:
http://i1281.photobucket.com/albums/a515/Carlos_Alberto_Ruiz_Naranjo/fft_zps6d97a95d.png
** My GPS signal autocorrelation:
http://i1281.photobucket.com/albums/a515/Carlos_Alberto_Ruiz_Naranjo/autocorrelation_zps70030f04.png
*** I DO NOT want to raise the frequency at 1575.42 MHz
Thank you! :)
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