On 3/24/2011 1:06 PM, Wimpie wrote:
On 24 mar, 18:42, "Szczepan wrote:
napisal w ...

But what with the space. The AM should be better than FM to communicate with
the Mars.
Is/were FM used for long distances?

As power is limiting factor, a modulation scheme with coherent
detection and digital decoding will give best performance (best Eb/N0
ratio for certain BER) I think. So it is not just a question of AM or
FM/PM, but more how it is processed at the receiver. Processing power
changed over time, so theoretically the best method may not be used
because of technical limitations.

Were done the proper experiments in the early years of radio?
S*

Best regards,

Wim
PA3DJS
www.tetech.nl


There's a non-zero chance you went beyond his knowledge base. (no ;
needed)

tom
K0TAR