58 lines
1.6 KiB
Plaintext
58 lines
1.6 KiB
Plaintext
|
subroutine genqra64(msg0,ichk,msgsent,itone,itype)
|
||
|
|
|
||
|
|
! Encodes a QRA64 message to yield itone(1:84)
|
||
|
|
|
||
|
|
use packjt
|
||
|
|
character*22 msg0
|
||
|
|
character*22 message !Message to be generated
|
||
|
|
character*22 msgsent !Message as it will be received
|
||
|
|
integer itone(84)
|
||
|
|
character*3 cok !' ' or 'OOO'
|
||
|
|
logical old_qra_sync
|
||
|
|
integer dgen(13)
|
||
|
|
integer sent(63)
|
||
|
|
integer icos7(0:6)
|
||
|
|
data icos7/2,5,6,0,4,1,3/ !Defines a 7x7 Costas array
|
||
|
|
save
|
||
|
|
|
||
|
|
if(msg0(1:1).eq.'@') then
|
||
|
|
read(msg0(2:5),*,end=1,err=1) nfreq
|
||
|
|
go to 2
|
||
|
|
1 nfreq=1000
|
||
|
|
2 itone(1)=nfreq
|
||
|
|
write(msgsent,1000) nfreq
|
||
|
|
1000 format(i5,' Hz')
|
||
|
|
else
|
||
|
|
message=msg0
|
||
|
|
do i=1,22
|
||
|
|
if(ichar(message(i:i)).eq.0) then
|
||
|
|
message(i:)=' '
|
||
|
|
exit
|
||
|
|
endif
|
||
|
|
enddo
|
||
|
|
|
||
|
|
do i=1,22 !Strip leading blanks
|
||
|
|
if(message(1:1).ne.' ') exit
|
||
|
|
message=message(i+1:)
|
||
|
|
enddo
|
||
|
|
|
||
|
|
call chkmsg(message,cok,nspecial,flip)
|
||
|
|
call packmsg(message,dgen,itype) !Pack message into 72 bits
|
||
|
|
call unpackmsg(dgen,msgsent) !Unpack to get message sent
|
||
|
|
if(ichk.ne.0) go to 999 !Return if checking only
|
||
|
|
call qra64_enc(dgen,sent) !Encode using QRA64
|
||
|
|
|
||
|
|
nsync=10
|
||
|
|
inquire(file='old_qra_sync',exist=old_qra_sync)
|
||
|
|
if(old_qra_sync) nsync=1
|
||
|
|
|
||
|
|
itone(1:7)=nsync*icos7 !Insert 7x7 Costas array in 3 places
|
||
|
|
itone(8:39)=sent(1:32)
|
||
|
|
itone(40:46)=nsync*icos7
|
||
|
|
itone(47:77)=sent(33:63)
|
||
|
|
itone(78:84)=nsync*icos7
|
||
|
|
endif
|
||
|
|
|
||
|
|
999 return
|
||
|
|
end subroutine genqra64
|