[opendtv] Re: 20060616 Free Friday Fragments (Mark's Monday Memo)
- From: Doug McDonald <mcdonald@xxxxxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Sat, 17 Jun 2006 09:16:38 -0500
Manfredi, Albert E wrote:
>
> In other words, if a given PN1023 sequence is very, very good for
> training, then use 2000 data symbols instead. What's the big deal?
Self-orthogonality, that's what. 2047 ... or even 1023 ...
training symbols in the form of a self-orthogonal training
sequence is worth about 200,000 random symbols. While it is
very easy to get amplitude information from random symbols,
phase information is much harder. It's not terribly hard to
track the phase info, one it is obtained from a training
sequence.
Doug McDonald
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