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Remove residual dt error caused by decimation filter and coherent integrator. Also, typos and minor edits on ftrsd paper.

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git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@6387 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
This commit is contained in:
Steven Franke 2016-01-12 03:28:30 +00:00
parent 6c925494ec
commit f78c11010c
2 changed files with 12 additions and 12 deletions
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4
lib/decode65a.f90
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@ -39,7 +39,8 @@ subroutine decode65a(dd,npts,newdat,nqd,f0,nflip,mode65,ntrials, &
dtbest=dt dtbest=dt
call afc65b(c5x,n6,fsample,nflip,a,ccfbest,dtbest) call afc65b(c5x,n6,fsample,nflip,a,ccfbest,dtbest)
call timer('afc65b ',1) call timer('afc65b ',1)
dtbest=dtbest+0.003628 ! remove decimation filter and coh. integrator delay
dt=dtbest !return new, improved estimate of dt
sync2=3.7e-4*ccfbest/sq0 !Constant is empirical sync2=3.7e-4*ccfbest/sq0 !Constant is empirical
! Apply AFC corrections to the time-domain signal ! Apply AFC corrections to the time-domain signal
@ -79,7 +80,6 @@ subroutine decode65a(dd,npts,newdat,nqd,f0,nflip,mode65,ntrials, &
call timer('dec65b ',0) call timer('dec65b ',0)
call decode65b(s2,nflip,mode65,ntrials,naggressive,ndepth, & call decode65b(s2,nflip,mode65,ntrials,naggressive,ndepth, &
mycall,hiscall,hisgrid,nexp_decode,nqd,nft,qual,nhist,decoded) mycall,hiscall,hisgrid,nexp_decode,nqd,nft,qual,nhist,decoded)
dt=dtbest !return new, improved estimate of dt
call timer('dec65b ',1) call timer('dec65b ',1)
return return

8
lib/ftrsd/ftrsd_paper/ftrsd.lyx
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@ -2265,8 +2265,8 @@ ing tones of signals from DL7UAE and SP6GWB.
\begin_inset Formula $-24$ \begin_inset Formula $-24$
\end_inset \end_inset
dB, respectrively, just one or two dB above the decoding threshold for dB, respectively, just one or two dB above the decoding threshold for the
the FT decoder. FT decoder.
Note that the two signals overlap throughout 94% of their occupied bandwidths, Note that the two signals overlap throughout 94% of their occupied bandwidths,
yet both are decoded cleanly and without errors. yet both are decoded cleanly and without errors.
Such behavior is typical of the JT65 protocol. Such behavior is typical of the JT65 protocol.
@ -2301,8 +2301,8 @@ name "fig:JT65B_EME"
Examples of JT65B EME signals recorded at K1JT. Examples of JT65B EME signals recorded at K1JT.
Numbers above the spectrogram are audio frequencies in Hz, and the spectrogram' Numbers above the spectrogram are audio frequencies in Hz, and the spectrogram'
s vertical direction is one minute of time. s vertical direction is one minute of time.
The horizintal green bar indicates full band occupied by the second decoded The horizontal green bar on the frequency axis indicates the bandwidth
signal, a reply from SP6GWB. occupied by the second decoded signal, a reply from SP6GWB.
See text for additional details. See text for additional details.
\end_layout \end_layout