Bob Miller wrote: > I wrote >>> If multipath is static or slowly changing, you can >>> average different occurances of the PN seqence and >>> get, in the static case, essentially perfect >>> removal of the PN sequence interference with the >>> COFDM caused by multipath. In the static case, in >>> other words, even with severe multipath, the PN >>> sequence add NO NOISE to the COFDM data, after >>> processing. >>> >>> Oh yes ... pilot carriers are either not needed or >>> of reduced need. >> Yes, this is interesting indeed, and shows what's happening here. >> Convergence. Multicarrier and single carrier receivers working much the >> same way. > > I have said in the past that if 8-VSB could be made to work I would like to > use it. The question is can it be made to work with current receivers. Both > E-VSB and A-VSB do not work with current receivers IMO. > None of the proposed schemes are backwards compatible. The scheme I propose above for COFDM is essentially as (AVERAGE!, not peak) power intensive as VSB at the same bitrate. In the long run they will be competitive. COFDM will them have a small advantage in receiver complexity: I emphasize SMALL, since the best method of using it without pilots will require fairly complicated batch processing. Doug McDonald ---------------------------------------------------------------------- You can UNSUBSCRIBE from the OpenDTV list in two ways: - Using the UNSUBSCRIBE command in your user configuration settings at FreeLists.org - By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word unsubscribe in the subject line.