122 lines
2.6 KiB
Plaintext
122 lines
2.6 KiB
Plaintext
subroutine sfrsd(mrsym,mrprob,mr2sym,mr2prob,ntrials,correct,indexes, &
|
|
param,ntry)
|
|
|
|
integer mrsym(0:62),mrprob(0:62),mr2sym(0:62),mr2prob(0:62)
|
|
integer correct(0:62),indexes(0:62),probs(0:62),thresh0(0:62)
|
|
integer rxdat(0:62),rxdat2(0:62),rxprob(0:62),rxprob2(0:62)
|
|
integer workdat(0:62),era_pos(0:50)
|
|
integer perr(0:7,0:7)
|
|
integer param(0:7)
|
|
real ratio0(0:62)
|
|
|
|
call init_rs_int()
|
|
do i=0,62
|
|
rxdat(i)=mrsym(62-i)
|
|
rxdat2(i)=mr2sym(62-i)
|
|
rxprob(i)=mrprob(62-i)
|
|
rxprob2(i)=mr2prob(62-i)
|
|
enddo
|
|
|
|
do i=0,62
|
|
indexes(i)=i
|
|
probs(i)=rxprob(i)
|
|
enddo
|
|
|
|
do ip=1,62
|
|
do k=0,63-ip
|
|
if(probs(k).lt.probs(k+1)) then
|
|
ntmp=probs(k)
|
|
probs(k)=probs(k+1)
|
|
probs(k+1)=ntmp
|
|
ntmp=indexes(k)
|
|
indexes(k)=indexes(k+1)
|
|
indexes(k+1)=ntmp
|
|
endif
|
|
enddo
|
|
enddo
|
|
|
|
era_pos=0
|
|
numera=0
|
|
workdat=rxdat
|
|
call decode_rs_int()
|
|
if(nerr.ge.0) then
|
|
correct=workdat
|
|
param=0
|
|
return
|
|
endif
|
|
|
|
call random_seed()
|
|
|
|
ncandidates=0
|
|
nsum=0
|
|
do i=0,62
|
|
nsum=nsum+rxprob(i)
|
|
j=indexes(62-i)
|
|
ratio0(i)=float(rxprob2(j))/(float(rxprob(j))+0.01)
|
|
ii=int(7.999*ratio0(i))
|
|
jj=(62-i)/8
|
|
thresh0(i)=nint(1.3*perr(jj,ii))
|
|
enddo
|
|
if(nsum.eq.0) return
|
|
|
|
do k=0,ntrials
|
|
era_pos=0
|
|
workdat=rxdat
|
|
numera=0
|
|
do i=0,62
|
|
j=indexes(62-i)
|
|
thresh=thresh0(i)
|
|
ir=rand()
|
|
if(...) then
|
|
era_pos(numera)=j
|
|
numera=numera+1
|
|
endif
|
|
enddo
|
|
|
|
call decode_rs_int()
|
|
if(nerr.ge.0) then
|
|
ncandidates=ncandidates+1
|
|
nhard=0
|
|
nsoft=0
|
|
nsofter=0
|
|
do i=0,62
|
|
if(workdat(i).ne.rxdat(i)) then
|
|
nhard=nhard+1
|
|
nsofter=nsofter+rxprob(i)
|
|
if(workdat(i).ne.rxdat2(i)) nsoft=nsoft+rxprob(i)
|
|
else
|
|
nsofter=nsofter-rxprob(i)
|
|
endif
|
|
enddo
|
|
nsoft=63*nsoft/nsum
|
|
nsofter=63*nsofter/nsum
|
|
ntotal=nsoft+nhard
|
|
if(ntotal.lt.ntotal_min) then
|
|
nsoft_min=nsoft
|
|
nhard_min=nhard
|
|
nsofter_min=nsofter
|
|
ntotal_min=ntotal
|
|
correct=workdat
|
|
nera_best=numera
|
|
ntry=k
|
|
endif
|
|
if(ntotal_min.lt.72 .and. nhard_min.lt.42) exit
|
|
endif
|
|
if(k.eq.ntrials-1) ntry=k+1
|
|
enddo
|
|
|
|
if(ntotal_min.ge.76 .or. nhard.ge.44) nhard_min=-1
|
|
|
|
param(0)=ncandidates
|
|
param(1)=nhard_min
|
|
param(2)=nsoft_min
|
|
param(3)=nera_best
|
|
param(4)=nsofter_min
|
|
if(param(0).eq.0) param(2)=-1
|
|
|
|
return
|
|
end subroutine sfrsd
|
|
|
|
|
|
|