Return to KLUBNL.PL main page
| To: | [email protected] |
|---|---|
| Subject: | Re: LF: Coherent BPSK on LF using EbNaut |
| From: | John Andrews <[email protected]> |
| Date: | Fri, 25 Sep 2015 08:29:59 -0400 |
| In-reply-to: | <CAA8k23T1or-Rgck+UAGo12413LATN-dNNQTAAAiggcVmWvbxhw@mail.gmail.com> |
| References: | <[email protected]> <CAA8k23T1or-Rgck+UAGo12413LATN-dNNQTAAAiggcVmWvbxhw@mail.gmail.com> |
| Reply-to: | [email protected] |
| Sender: | [email protected] |
| User-agent: | Mozilla/5.0 (Windows NT 6.1; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.2.0 |
Some years ago I proposed GPS / UTC seconds locked coherent signalling on LF, but didn't have the expertise to write the software - and certainly not to implement strong FEC ! Andy G4JNT Somewhere around February, 2004, Bill de Carle, VE2IQ, came out with a version of AFRICAM that implemented GPS-synched BPSK. A number of us played with it in the 160-190 kHz U.S. "Lowfer" band. The GPS sync greatly reduced the lock-in time at the decoder end, and was quite effective. When the first of the U.S. experimental stations arrived on 2200 meters later that year, we tried it down there, again with good results among a small group of listeners. Given the small target audience, we all moved on other things. Anyway, just to note for historical purposes that some of this has been done before! John, W1TAG |
| <Prev in Thread] | Current Thread | [Next in Thread> |
|---|---|---|
| ||
| Previous by Date: | Re: LF: Coherent BPSK on LF using EbNaut, Andy Talbot |
|---|---|
| Next by Date: | Re: LF: First MF TA since a longer time, John Andrews |
| Previous by Thread: | Re: LF: Coherent BPSK on LF using EbNaut, Andy Talbot |
| Next by Thread: | Re: LF: Coherent BPSK on LF using EbNaut, Bill de Carle |
| Indexes: | [Date] [Thread] [Top] [All Lists] |