Merged master 8748
This commit is contained in:
Jordan Sherer
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<HTML><HEAD>
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<TITLE> Programs for Low Density Parity Check Codes </TITLE>
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</HEAD><BODY>
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<H1> Programs for Low Density Parity Check Codes </H1>
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Programs are available for creating LDPC codes, encoding messages,
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simulating transmission through a channel, and decoding the received
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message. There are links here to the general documentation on each of
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these operations, and to the detailed documentation on the relevant
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programs.
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<P>The programs names below are followed by the form of arguments they
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take; a similar usage message is displayed when a program is run with
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no arguments. In these descriptions, things to be entered literally
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are in roman font, descriptions of something to be supplied are in
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italic. Arguments in square brackets are optional. A vertical bar
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separates alternatives. Dots represent indefinite repetition.
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<P>Many of the arguments are file names, which can be a dash ("-") in
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order to specify that standard input or standard output is to be used.
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(However, you can't use standard input or output for more than one thing.)
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<P>Click on a main title below for general information on that aspect
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of the software, or on the name of a program for detailed information.
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<P><A HREF="pchk.html">Creating a parity check matrix for a code</A>:
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<BLOCKQUOTE><PRE>
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<A HREF="pchk.html#make-pchk">make-pchk</A> <I>pchk-file n-checks n-bits row</I>:<I>col ...</I>
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<A HREF="pchk.html#alist-to-pchk">alist-to-pchk</A> [ -t ] <I>alist-file pchk-file</I>
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<A HREF="pchk.html#pchk-to-alist">pchk-to-alist</A> [ -t ] [ -z ] <I>pchk-file alist-file</I>
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<A HREF="pchk.html#print-pchk">print-pchk</A> [ -d ] [ -t ] <I>pchk-file</I>
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<A HREF="pchk.html#make-ldpc">make-ldpc</A> <I>pchk-file n-checks n-bits seed method</I>
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</PRE></BLOCKQUOTE>
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<P><A HREF="encoding.html">Encoding message blocks as codewords</A>:
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<BLOCKQUOTE><PRE>
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<A HREF="encoding.html#make-gen">make-gen</A> <I>pchk-file gen-file method</I>
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<A HREF="encoding.html#print-gen">print-gen</A> [ -d ] <I>gen-file</I>
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<A HREF="encoding.html#encode">encode</A> [ -f ] <I>pchk-file gen-file source-file encoded-file</I>
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</PRE></BLOCKQUOTE>
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<P><A HREF="channel.html">Transmitting bits through a simulated channel:</A>
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<BLOCKQUOTE><PRE>
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<A HREF="channel.html#transmit">transmit</A> <I>encoded-file</I>|<I>n-zeros received-file seed channel</I>
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</PRE></BLOCKQUOTE>
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<P><A HREF="decoding.html">Decoding received blocks:</A>
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<BLOCKQUOTE><PRE>
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<A HREF="decoding.html#decode">decode</A> [ -f ] [ -t | -T ] <I>pchk-file received-file decoded-file</I> [ <I>bp-file</I> ] <I>channel method</I>
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<A HREF="decoding.html#extract">extract</A> <I>gen-file decoded-file extracted-file</I>
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</PRE></BLOCKQUOTE>
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<P><A HREF="support.html">Support programs:</A>
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<BLOCKQUOTE><PRE>
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<A HREF="support.html#rand-src">rand-src</A> <I>source-file seed n-bits</I>
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<A HREF="support.html#verify">verify</A> [ -t ] <I>pchk-file decoded-file</I> [ <I>gen-file</I> [ <I>source-file</I> ] ]
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</PRE></BLOCKQUOTE>
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See also the discussions of <A HREF="dep-H.html">linear dependence in
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parity check matrices</A> and of <A HREF="sparse-LU.html">sparse LU
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decomposition methods</A>, and the <A HREF="examples.html">examples
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of program usage</A>.
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<HR>
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<A HREF="index.html">Back to index for LDPC software</A>
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</BODY></HTML>
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@@ -1,55 +0,0 @@
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=== New in Version 1.8
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For quick reference, here's a short list of features and capabilities
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added to _WSJT-X_ since Version 1.7.0:
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- New mode *FT8* designed for fast QSOs
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- New tool *FreqCal* for accurate frequency calibration of your radio
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- Improved decoding performance for JT65, QRA64, and MSK144
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- *SWL* option for third-party decoding short-format MSK144 messages
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- Experimental phase equalization for MSK144
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- Options to minimize screen space used by *Main* and *Wide Graph*
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windows
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- New set of suggested default frequencies specific to the three IARU
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regions
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- Enhanced scheme for managing table of suggested default operating
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frequencies
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- Improved CAT control for many radios, including those controlled
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through Commander or OmniRig
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- Bug fixes and minor tweaks to user interface
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=== Documentation Conventions
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In this manual the following icons call attention to particular types
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of information:
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NOTE: *Notes* containing information that may be of interest to
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particuar classes of users.
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TIP: *Tips* on program features or capabilities that might otherwise be
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overlooked.
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IMPORTANT: *Warnings* about usage that could lead to undesired
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consequences.
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=== How You Can Contribute
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_WSJT-X_ is part of an open-source project released under the
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{gnu_gpl} (GPL). If you have programming or documentation skills or
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would like to contribute to the project in other ways, please make
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your interests known to the development team. The project's
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source-code repository can be found at {devsvn}, and most
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communication among the developers takes place on the email reflector
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{devmail}. Bug reports and suggestions for new features, improvements
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to the _WSJT-X_ User Guide, etc., may also be sent to the
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{wsjt_yahoo_group} email reflector. You must join the relevant group
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before posting to either email list.
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@@ -1,77 +0,0 @@
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subroutine addit(itone,nfsample,nsym,nsps,ifreq,sig,dat)
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integer itone(nsym)
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real dat(60*12000)
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real*8 f,dt,twopi,phi,dphi,baud,fsample,freq,tsym,t
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tsym=nsps*1.d0/nfsample !Symbol duration
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baud=1.d0/tsym
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fsample=12000.d0 !Sample rate (Hz)
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dt=1.d0/fsample !Sample interval (s)
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twopi=8.d0*atan(1.d0)
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f=ifreq
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phi=0.
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k=12000 !Start audio at t = 1.0 s
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ntot=nsym*tsym/dt
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t=0.
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isym0=-1
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do i=1,ntot
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t=t+dt
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isym=nint(t/tsym) + 1
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if(isym.ne.isym0) then
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freq=f + itone(isym)*baud
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dphi=twopi*freq*dt
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isym0=isym
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endif
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phi=phi + dphi
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if(phi.gt.twopi) phi=phi-twopi
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xphi=phi
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k=k+1
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dat(k)=dat(k) + sig*sin(xphi)
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enddo
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return
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end subroutine addit
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subroutine addcw(icw,ncw,ifreq,sig,dat)
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integer icw(ncw)
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real dat(60*12000)
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real s(60*12000)
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real x(60*12000)
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real y(60*12000)
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real*8 dt,twopi,phi,dphi,fsample,tdit,t
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wpm=25.0
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nspd=nint(1.2*12000.0/wpm)
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fsample=12000.d0 !Sample rate (Hz)
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dt=1.d0/fsample !Sample interval (s)
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tdit=nspd*dt
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twopi=8.d0*atan(1.d0)
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dphi=twopi*ifreq*dt
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phi=0.
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k=12000 !Start audio at t = 1.0 s
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t=0.
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npts=60*12000
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x=0.
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do i=1,npts
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t=t+dt
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j=nint(t/tdit) + 1
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j=mod(j-1,ncw) + 1
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phi=phi + dphi
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if(phi.gt.twopi) phi=phi-twopi
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xphi=phi
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k=k+1
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x(k)=icw(j)
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s(k)=sin(xphi)
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if(t.ge.59.5) exit
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enddo
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nadd=0.004/dt
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call smo(x,npts,y,nadd)
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y=y/nadd
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dat=dat + sig*y*s
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return
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end subroutine addcw
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@@ -1,33 +0,0 @@
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#ifndef MESSAGEAVERAGING_H
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#define MESSAGEAVERAGING_H
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#include <QWidget>
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class QSettings;
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class QFont;
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namespace Ui {
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class MessageAveraging;
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}
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class MessageAveraging : public QWidget
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{
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public:
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explicit MessageAveraging(QSettings *, QFont const&, QWidget * parent = 0);
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~MessageAveraging();
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void displayAvg(QString const&);
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void changeFont (QFont const&);
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protected:
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void closeEvent (QCloseEvent *) override;
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private:
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void read_settings ();
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void write_settings ();
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void setContentFont (QFont const&);
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QSettings * settings_;
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QScopedPointer<Ui::MessageAveraging> ui;
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};
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#endif // MESSAGEAVERAGING_H
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