Hi Richard,
"Richard Clark" wrote in message
...
Deep space communications proceeds many dB below the noise floor
enabled through technology that has become ubiquitous in cell phones -
Spread Spectrum.

Aka, "averaging" (for the direct-sequence style of spread spectrum, ala CDMA
or GPS).

Still, AFAIK all that averaging can do is to effectively lower the noise floor
at the expense of bandwidth (effectively data rate), and the more benefit
you'd like to get from that averaging, the more important your sample points
become, which gets back to needing as little phase noise as possible on your
oscillators. Is there some other angle here?

---Joel