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Don't waste time on excess BP iterations when doing K=50. Decode a little deeper.

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This commit is contained in:
Steven Franke 2020-12-15 14:31:46 -06:00
parent c87926e657
commit 17195680ee
2 changed files with 7 additions and 2 deletions
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5
lib/fst4/decode240_74.f90
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@ -25,6 +25,8 @@ subroutine decode240_74(llr,Keff,maxosd,norder,apmask,message74,cw,ntype,nharder
include "ldpc_240_74_parity.f90" include "ldpc_240_74_parity.f90"
maxiterations=30 maxiterations=30
if(Keff.eq.50) maxiterations=1
nosd=0 nosd=0
if(maxosd.gt.3) maxosd=3 if(maxosd.gt.3) maxosd=3
if(maxosd.eq.0) then ! osd with channel llrs if(maxosd.eq.0) then ! osd with channel llrs
@ -36,6 +38,8 @@ subroutine decode240_74(llr,Keff,maxosd,norder,apmask,message74,cw,ntype,nharder
nosd=0 nosd=0
endif endif
if(maxosd.eq.0) goto 73
toc=0 toc=0
tov=0 tov=0
tanhtoc=0 tanhtoc=0
@ -133,6 +137,7 @@ subroutine decode240_74(llr,Keff,maxosd,norder,apmask,message74,cw,ntype,nharder
enddo ! bp iterations enddo ! bp iterations
73 continue
do i=1,nosd do i=1,nosd
zn=zsave(:,i) zn=zsave(:,i)
! call osd240_74(zn,Keff,apmask,norder,message74,cw,nharderror,dminosd) ! call osd240_74(zn,Keff,apmask,norder,message74,cw,nharderror,dminosd)

4
lib/fst4/fastosd240_74.f90
View File

@ -181,8 +181,8 @@ subroutine fastosd240_74(llr,k,apmask,ndeep,message74,cw,nhardmin,dmin)
nsyncmax=11 nsyncmax=11
elseif(ndeep.eq.4) then elseif(ndeep.eq.4) then
nord=4 nord=4
xlambda=3.5 xlambda=3.4
nsyndmax=11 nsyndmax=12
endif endif
s1=sum(absrx(1:k)) s1=sum(absrx(1:k))