On 6/14/18 4:27 AM, Tim Shoppa wrote:
Quoting Wikipedia; 16.368 MHz is 16 times the 1.023 MHz C/A GPS signal chipping
rate; multiplied by 96.25 to get the 1575.42 MHz L1 frequency and multiplied by
75 to get the 1227.60 MHz L2 frequency.
Possibly something Trimble significant with the 16.368 MHz
frequency that I'm not yet aware of... if anyone would care
to speculate, please do.
A typical direct sampling receiver would sample the RF at 16.368, and
that puts the L1 received signal nicely at fs/4. The P code would
overlap the sampling bandwidth of 8.184 MHz, but the C/A code fits well
within that range. And, since it's not at "zero", any doppler just moves
it from the center, but it's still "positive" frequency.
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