Several more minor edits.

git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@6445 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
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Joe Taylor 2016-01-27 15:27:38 +00:00
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@ -15,6 +15,7 @@
\makeatother
\usepackage{nomencl}
\usepackage{overcite}
\renewcommand{\nomname}{Sidebar: Glossary of Specialized Terms}
\end_preamble
@ -383,9 +384,9 @@ WSJT-X
Section 7 summarizes some on-the-air experiences with the new decoder.
Refer to the sidebar
\series bold
Glossary
Glossary of Specialized Terms
\series default
for brief definitions of some specialized terms.
for brief definitions of some potentially unfamiliar language.
\end_layout
\begin_layout Section
@ -399,7 +400,7 @@ JT65 Messages and Reed Solomon Codes
\end_layout
\begin_layout Standard
JT65 message frames consist of a short compressed 72-bit message encoded
The JT65 message frame consists of a short, compressed 72-bit message encoded
for transmission with a Reed-Solomon code.
Reed-Solomon codes are
\emph on
@ -434,7 +435,7 @@ description "For the JT65 code, a vector of 63 symbol values each in the range 0
\end_inset
, the number of message symbols conveyed by the codeword; and the transmission
alphabet, or number of possible values for each symbol in the codewords.
alphabet, or number of possible values for each symbol in a codeword.
The codeword length and the number of message symbols are specified with
the notation
\begin_inset Formula $(n,k)$
@ -456,7 +457,7 @@ description "Compression of a message to use a minimum number or bits. JT65 sou
\end_inset
messages conveyed by a 63-symbol JT65 frame thus consist of 72 information
message conveyed by a 63-symbol JT65 frame thus consists of 72 information
bits.
The JT65 code is
\emph on
@ -666,7 +667,7 @@ The FT algorithm uses the estimated quality of received symbols to generate
of received words with more than 25 errors.
Algorithms of this type are generally called
\emph on
reliability based
reliability-based
\emph default
or
\emph on
@ -1192,7 +1193,7 @@ We use 3-bit quantization of the metrics
\begin_inset Formula $p_{2}/p_{1}$
\end_inset
to index the entries in an
to index the entries in an
\begin_inset Formula $8\times8$
\end_inset
@ -2010,7 +2011,7 @@ Comparisons of decoding performance are usually presented in the professional
, the signal-to-noise ratio in a 2500 Hz reference bandwidth.
The relationship between
\begin_inset Formula $E_{b}/N_{o}$
\begin_inset Formula $E_{b}/N_{0}$
\end_inset
and
@ -2060,7 +2061,7 @@ Simulated results on the AWGN channel
\begin_layout Standard
Results of simulations using the BM, KV, and FT decoding algorithms on the
JT65 code are presented in terms of word error rate versus
\begin_inset Formula $E_{b}/N_{o}$
\begin_inset Formula $E_{b}/N_{0}$
\end_inset
in Figure
@ -2110,7 +2111,7 @@ As expected, on the AWGN channel the soft-decision algorithms FT and KV
\begin_inset Formula $T=10^{5}$
\end_inset
execution time for FT is longer than that for the KV algorithm, but still
execution time for FT is longer than that for the KV algorithm, but still
small enough to be fully practical on today's home computers.
\end_layout
@ -2178,7 +2179,7 @@ WSJT
\begin_layout Standard
Error-free transmission is important in commercial applications, so plots
like that in Figure
like Figure
\begin_inset CommandInset ref
LatexCommand ref
reference "fig:bodide"
@ -2204,7 +2205,7 @@ reference "fig:WER2"
\end_inset
replots the FT and KV results from Figure
shows the FT and KV results from Figure
\begin_inset CommandInset ref
LatexCommand ref
reference "fig:bodide"
@ -2658,8 +2659,8 @@ reference "fig:spectrogram"
band.
At this time the band was crowded with overlapping signals.
With care you can count at least 19 distinct synchronizing tones (the speckled
vertical lines in the figure), and can see that in some places as many
as four signals overlap.
vertical lines in the figure), and can see as many as four signals overlapping
in some places.
After signal processing to demodulate the signals and produce soft-symbol
data for the FT decoder, program
\emph on
@ -2674,8 +2675,8 @@ WSJT-X
The strongest signals (12 in this example) are sequentially decoded and
subtracted from the raw data after the first pass.
Another 9 signals are decoded in the second pass.
For comparison, the hard-decision BM decoder decodes a total of 12 messages
from this recording (9 in the first pass and 3 more in a second).
For comparison, the hard-decision BM decoder decodes only 12 messages from
this recording (9 in the first pass and 3 more in a second).
\end_layout
\begin_layout Standard
@ -2687,8 +2688,8 @@ status open
\begin_layout Plain Layout
\align center
\begin_inset Graphics
filename fig_waterfall.tiff
width 6.5in
filename fig_waterfall.png
scale 60
BoundingBox 0bp 0bp 1124bp 200bp
clip
@ -2750,7 +2751,11 @@ key "karn"
\end_inset
, modified slightly so that the Reed-Solomon syndromes are computed only
once in our most time-consuming loop (steps 2 through 8, Algorithm 1).
once in our most time-consuming loop (steps 2 through 8,
\series bold
Algorithm 1
\series default
).
The FT algorithm has become an integral part of programs
\emph on
WSJT,
@ -2838,8 +2843,8 @@ key "kv2001"
IEEE Transactions on Information Theory
\emph default
, Vol.
49, Nov.
2003.
49, pp.
2809-2825, 2003.
\end_layout
\begin_layout Bibliography
@ -2889,7 +2894,8 @@ IEEE Communications Letters
\emph default
, Vol.
14, No.
9, September 2010.
9, pp.
863-865, 2010.
\end_layout
\begin_layout Bibliography
@ -2914,7 +2920,11 @@ GLOBECOM
\begin_inset Quotes erd
\end_inset
2008 proceedings.
Proceedings,
\emph default
2008
\emph on
.
\end_layout
\begin_layout Bibliography
@ -2935,8 +2945,8 @@ key "ls2009"
IEEE Signal Processing Letters,
\emph default
Vol.
16, No.
8, August 2009.
16, pp.
691-694, 2009.
\end_layout
\begin_layout Bibliography