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Finish writing a usable version of program qra64code.

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git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@7328 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
This commit is contained in:
Joe Taylor 2016-11-21 21:23:48 +00:00
parent 120b2ea151
commit 5e90bd6d42
1 changed files with 38 additions and 99 deletions
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93
lib/qra64code.f90
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@ -2,56 +2,32 @@ 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
! 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
! protocol.
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*,' qra64code -t [snr2500]'
print*,'Usage: qra64code "message"'
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") then
nmsg=NTEST
else
if(nargs.ge.3) then
call getarg(3,arg)
read(arg,*) nrpt
endif
endif
if(msg(1:2).eq."-t") nmsg=NTEST
write(*,1010)
1010 format(" Message Decoded Err? Type rc"/77("-"))
1010 format(" Message Decoded Err? Type"/74("-"))
ngood=0
nbad=0
do nn=1,nrpt
do imsg=1,nmsg
if(nmsg.gt.1) msg=testmsg(imsg)
call fmtmsg(msg,iz) !To upper, collapse mult blanks
@ -69,59 +45,22 @@ program QRA64code
call qra64_enc(dgen,sent) !Encode using QRA64
! Generate a simulated s3() array with moderately high S/N
do j=1,63
do i=0,63
x=gran()
y=gran()
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 unpackmsg(dgen,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)
write(*,1020) ii,msg0,decoded,itype,msgtype
1020 format(i4,1x,a22,2x,a22,4x,i3,": ",a13)
enddo
if(nmsg.eq.1 .and.nrpt.eq.1) then
if(nmsg.eq.1) then
write(*,1030) dgen
1030 format(/'Packed message, 6-bit symbols ',12i3) !Display packed symbols
1030 format(/'Packed message, 6-bit symbols: ',12i3) !Display packed symbols
write(*,1040) sent
1040 format(/'Information-carrying channel symbols'/(i5,20i3))
1040 format(/'Information-carrying channel symbols:'/(i5,29i3))
write(*,1050) dec
1050 format(/'Received message, 6-bit symbols ',12i3) !Display packed symbols
endif
enddo
if(nrpt.gt.1) then
write(*,1060) ngood,nrpt,nbad
1060 format('Decoded messages:',i5,'/',i4,' Undetected errors:',i5)
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