[wsjt-devel] choosing the best CRC for short data blocks

2018-01-25 Thread Don Goldston
ailed description of the various modes available to members of this list? I am a new ham, but did waveform design and optimal detection for many years until I retired last May. I may be able to help in some manner. 73,

Re: [wsjt-devel] choosing the best CRC for short data blocks

2018-01-25 Thread Don Goldston
> generators when used with the 75-bit information block in FT8. The CRC12 > used in FT8 is slightly sub-optimal, but the resulting increase in > undetected error rate is only a factor of 1.6. Since the error rate is > already very low, the consequences are not serious. > >

[wsjt-devel] channel description

2018-02-15 Thread Don Goldston
I've looked a HF enough to know what a wry grin I will get with this question, but I'm willing to risk a few guffaws at my expense. It appears that FT8 (as one example) and WSJT-X are capable of at least somewhat defining the expected variability of the HF channel. Have you (the developers) mined

Re: [wsjt-devel] channel description

2018-02-20 Thread Don Goldston
considered by your team. Perhaps any objections raised by cost and scope could be reduced by a Federal grant? Regards, Don Goldston, KE0G On Feb 19, 2018 7:42 PM, "Steven Franke" wrote: Don, > It seems that by assuming a correct decode (and a time-invariant transmitter) each

[wsjt-devel] HF Channel Characterization (second try)

2018-02-22 Thread Don Goldston
too precious a resource to be ignored. Thanks for listening. This idea had to have already been considered by your team. Perhaps any objections raised by cost and scope could be reduced by a Federal grant? Regards, Don

[wsjt-devel] FT8 for 2018 Field Day

2018-03-27 Thread Don Goldston
Any chance that an FT8 mode that performs the required exchange of information for the 2018 Field Day could be created? I know y'all are wrapped up in DXP mode, but thought it was worth asking. Thanks, Don -- Check out th

Re: [wsjt-devel] FT8 for 2018 Field Day

2018-03-27 Thread Don Goldston
; field day. > > Best, > Jordan > KN4CRD > > On Mar 27, 2018, 7:40 AM -0400, Don Goldston , > wrote: > > Any chance that an FT8 mode that performs the required exchange of > information for the 2018 Field Day could be created? > > I know y'a