WSJT-X/lib/fsk4hf/genwsprdpsk.f90
Steven Franke bd0d414365 More work on a simulator for dpsk with root-raised-cosine pulses.
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@8632 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
2018-04-22 19:51:31 +00:00

60 lines
1.6 KiB
Fortran

subroutine genwsprdpsk(msg,msgsent,imessage)
! Encode a WSPRDPSK message, producing array txwave().
!
use crc
include 'wsprdpsk_params.f90'
character*22 msg,msgsent
character*64 cbits
character*32 sbits
integer iuniqueword0
integer*1,target :: idat(9)
integer*1 msgbits(68),codeword(ND)
logical first
integer ipreamble(16) !Freq estimation preamble
integer isync(32) !Long sync vector
integer imessage(NN)
data ipreamble/1,1,1,1,0,0,0,0,0,0,0,0,1,1,1,1/
data first/.true./
data iuniqueword0/z'30C9E8AD'/
save first,isync,ipreamble
if(first) then
write(sbits,'(b32.32)') iuniqueword0
read(sbits,'(32i1)') isync(1:32)
first=.false.
endif
idat=0
call wqencode(msg,ntype0,idat) !Source encoding
id7=idat(7)
if(id7.lt.0) id7=id7+256
id7=id7/64
write(*,*) 'idat ',idat
icrc=crc14(c_loc(idat),9)
write(*,*) 'icrc: ',icrc
write(*,'(a6,b16.16)') 'icrc: ',icrc
call wqdecode(idat,msgsent,itype)
print*,msgsent,itype
write(cbits,1004) idat(1:6),id7,iand(icrc,z'3FFF')
1004 format(6b8.8,b2.2,b14.14)
msgbits=0
read(cbits,1006) msgbits(1:64)
1006 format(64i1)
write(*,'(50i1,1x,14i1,1x,4i1)') msgbits
call encode204(msgbits,codeword) !Encode the test message
imessage(1)=1 !reference bit
imessage(2:101)=codeword(1:100)
imessage(102:132)=isync(1:31) !only use 31 of the sync bits
imessage(133:232)=codeword(101:200)
do i=2,232
imessage(i)=mod(imessage(i-1)+imessage(i),2)
enddo
return
end subroutine genwsprdpsk