GPS signal generator


I am developing a GPS generator GRC. I use this block diagram:

  • 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 GPS signal autocorrelation:

*** I DO NOT want to raise the frequency at 1575.42 MHz

Thank you! :slight_smile:

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