The problem is that if this is a store and forward repeater you will accumulate too much time delay.
Leigh L Klotz, Jr. wrote: > Here is a related idea: We have seen with JT65a that sometimes when we > think the band is closed, it is just very poor instead. W1AW, which one > can sometimes hear all lone on the high bands (due to its power and > antennas) shows us this as well. I..e., what we assume is no > communications may in fact be just very noisy. > > Shannon tells us there is no limit to the S/N we can tolerate if we > reduce the data rate. > > So there may be a place as well for a repeater that receives lower-power > stations slowly and retransmits them as higher power faster, even though > it it couldn't then do the clever interleave that Bonnie proposes for > other situations. > > This idea would be somewhat like VHF FM repeaters, as they use the > limiting feature of FM to discriminate a noise-free low-power signal and > then retransmit. Instead, it would decode a low baud rate, ECC'd signal > to obtain a noiseless signal to re-encode and retransmit. > > Leigh/WA5ZNU > On Mon, 14 May 2007 3:22 am, bruce mallon wrote: > >>Then DO IT and let the FCC rule ..... >> >>Just remember for your long distance digipeaters to >>work the band must be open ..... >>unless your going to use ECHOLINK and if so whats the >>point ? >> >> >>--- expeditionradio <[EMAIL PROTECTED]> wrote: >> >> >>> Like many kinds of interesting digital >>> communications, it seems that >>> this sort of digital repeater falls into the gray >>> area of FCC rules. >>> The "retransmit" rules may preclude it. Welcome to >>> Technology Jail. >>> Nothing should stop an operator in another country >>> from setting one >>> up, it it could be used by US operators. >>> >>> Bonnie KQ6XA >>> >>> >>> >>> > This type of single channel HF digital voice >>> repeater is perfectly OK >>> > under USA's present FCC rules, and the rules of >>> most other countries. >>> > >>> > Bonnie KQ6XA >>> > >>> > > > Digital Voice repeaters, using single-channel >>> > > > near-real-time >>> > > > interleaved multiplexed OFDM, could work in a >>> 5kHz >>> > > > bandwidth. >>> > >>> >>> >>> >> >> >> >>____________________________________________________________________________________Pinpoint >> >>customers who are looking for what you sell. >>http://searchmarketing.yahoo.com/ >> >> >>Announce your digital presence via our Interactive Sked Page at >>http://www.obriensweb.com/drsked/drsked.php >> >>Yahoo! Groups Links >> >> >> > >
