Finish writing a usable version of program qra64code.

git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@7328 ab8295b8-cf94-4d9e-aec4-7959e3be5d79

lib/qra64code.f90

@@ -2,126 +2,65 @@ program QRA64code
 
 ! Provides examples of message packing, bit and symbol ordering,
 ! QRA (63,12) encoding, and other necessary details of the QRA64
-! protocol.  Also permits simple simulations to measure performance
+! protocol.  
-! on an AWGN channel with secure time and frequency synchronization.
-
-! Return codes from qra64_dec:
-!  irc=0    [?    ?    ?] AP0	(decoding with no a-priori information)
-!  irc=1    [CQ   ?    ?] AP27
-!  irc=2    [CQ   ?     ] AP42
-!  irc=3    [CALL ?    ?] AP29
-!  irc=4    [CALL ?     ] AP44
-!  irc=5    [CALL CALL ?] AP57
 
   use packjt
   character*22 msg,msg0,msg1,decoded,cok*3,msgtype*10,arg*12
   character*6 mycall
   logical ltext
   integer dgen(12),sent(63),dec(12)
-  real s3(0:63,1:63)
+  integer icos7(0:6)
+  data icos7/2,5,6,0,4,1,3/     !Defines a 7x7 Costas array
+
   include 'testmsg.f90'
 
   nargs=iargc()
   if(nargs.lt.1) then
-     print*,'Usage: qra64code "message" [snr2500] [Nrpt]'
+     print*,'Usage: qra64code "message"'
-     print*,'       qra64code -t [snr2500]'
+     print*,'       qra64code -t'
      go to 999
   endif
 
   call getarg(1,msg)                     !Get message from command line
-  snr2500=10.0
-  if(nargs.ge.2) then
-     call getarg(2,arg)
-     read(arg,*) snr2500
-  endif
-  sig=sqrt(2.0)*10.0**(0.05*(snr2500+29.7))
   nmsg=1
-  nrpt=1
+  if(msg(1:2).eq."-t") nmsg=NTEST
-  if(msg(1:2).eq."-t") then
-     nmsg=NTEST
-  else
-     if(nargs.ge.3) then
-        call getarg(3,arg)
-        read(arg,*) nrpt
-     endif
-  endif
 
   write(*,1010)
-1010 format("     Message                 Decoded                Err? Type             rc"/77("-"))
+1010 format("     Message                 Decoded                Err? Type"/74("-"))
 
-  ngood=0
+  do imsg=1,nmsg
-  nbad=0
+     if(nmsg.gt.1) msg=testmsg(imsg)
-  do nn=1,nrpt
+    call fmtmsg(msg,iz)                    !To upper, collapse mult blanks
-     do imsg=1,nmsg
+     msg0=msg                               !Input message
-        if(nmsg.gt.1) msg=testmsg(imsg)
+     call chkmsg(msg,cok,nspecial,flip)     !See if it includes "OOO" report
-        call fmtmsg(msg,iz)                    !To upper, collapse mult blanks
+     msg1=msg                               !Message without "OOO"
-        msg0=msg                               !Input message
+     call packmsg(msg1,dgen,itype)          !Pack message into 12 six-bit bytes
-        call chkmsg(msg,cok,nspecial,flip)     !See if it includes "OOO" report
+     msgtype=""
-        msg1=msg                               !Message without "OOO"
+     if(itype.eq.1) msgtype="Std Msg"
-        call packmsg(msg1,dgen,itype)          !Pack message into 12 six-bit bytes
+     if(itype.eq.2) msgtype="Type 1 pfx"
-        msgtype=""
+     if(itype.eq.3) msgtype="Type 1 sfx"
-        if(itype.eq.1) msgtype="Std Msg"
+     if(itype.eq.4) msgtype="Type 2 pfx"
-        if(itype.eq.2) msgtype="Type 1 pfx"
+     if(itype.eq.5) msgtype="Type 2 sfx"
-        if(itype.eq.3) msgtype="Type 1 sfx"
+     if(itype.eq.6) msgtype="Free text"
-        if(itype.eq.4) msgtype="Type 2 pfx"
-        if(itype.eq.5) msgtype="Type 2 sfx"
-        if(itype.eq.6) msgtype="Free text"
 
-        call qra64_enc(dgen,sent)              !Encode using QRA64
+     call qra64_enc(dgen,sent)              !Encode using QRA64
 
-! Generate a simulated s3() array with moderately high S/N
+     call unpackmsg(dgen,decoded)           !Unpack the user message
-        do j=1,63
+     call fmtmsg(decoded,iz)
-           do i=0,63
+     ii=imsg
-              x=gran()
+     write(*,1020) ii,msg0,decoded,itype,msgtype
-              y=gran()
+1020 format(i4,1x,a22,2x,a22,4x,i3,": ",a13)
-              s3(i,j)=x*x + y*y
-           enddo
-           k=sent(j)
-           x=gran() + sig
-           y=gran()
-           s3(k,j)=x*x + y*y
-        enddo
-
-        i1=index(msg1,' ')
-        mycall='      '
-        if(i1.ge.4) mycall=msg(1:i1-1)
-        call packcall(mycall,nmycall,ltext)
-        call qra64_dec(s3,nmycall,dec,snr,irc)            !Decode
-
-        decoded="                      "
-        if(irc.ge.0) then
-           call unpackmsg(dec,decoded)           !Unpack the user message
-           call fmtmsg(decoded,iz)
-        else
-           dec=0
-        endif
-
-        if(decoded.eq.msg0) then
-           ngood=ngood+1
-        else
-           if(irc.ge.0) nbad=nbad+1
-        endif
-        ii=imsg
-        if(nrpt.gt.1) ii=nn
-        write(*,1020) ii,msg0,decoded,itype,msgtype,irc
-1020    format(i4,1x,a22,2x,a22,4x,i3,": ",a13,i3)
-     enddo
-
-     if(nmsg.eq.1 .and.nrpt.eq.1) then
-        write(*,1030) dgen
-1030    format(/'Packed message, 6-bit symbols ',12i3) !Display packed symbols
-
-        write(*,1040) sent
-1040    format(/'Information-carrying channel symbols'/(i5,20i3))
-
-        write(*,1050) dec
-1050    format(/'Received message, 6-bit symbols ',12i3) !Display packed symbols
-     endif
   enddo
 
-  if(nrpt.gt.1) then
+  if(nmsg.eq.1) then
-     write(*,1060) ngood,nrpt,nbad
+     write(*,1030) dgen
-1060 format('Decoded messages:',i5,'/',i4,'   Undetected errors:',i5)
+1030 format(/'Packed message, 6-bit symbols: ',12i3) !Display packed symbols
-  endif
 
+     write(*,1040) sent
+1040 format(/'Information-carrying channel symbols:'/(i5,29i3))
+
+     write(*,1050) 10*icos7,sent(1:32),10*icos7,sent(33:63),10*icos7
+1050 format(/'Channel symbols including sync:'/(i5,29i3))
+  endif
+  
 999 end program QRA64code