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https://github.com/saitohirga/WSJT-X.git
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Temporary save of changes related to a7 decodes.
This commit is contained in:
Joe Taylor
parent
21f8303511
commit
c13407612e
@ -38,32 +38,31 @@ subroutine ft8_a7_save(nutc,dt,f,msg)
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! Add this decode to current table for this sequence
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ndec(j,1)=ndec(j,1)+1 !Number of decodes in this sequence
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i=ndec(j,1) !i is pointer to new table entry
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i=ndec(j,1) !i is index of a new table entry
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if(i.ge.MAXDEC-1) return !Prevent table overflow
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if(index(msg,'<...>').ge.1) return !Don't save an unknown hashcall
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dt0(i,j,1)=dt !Save dt in table
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f0(i,j,1)=f !Save f in table
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f0(i+1,j,1)=-99.0 !Flag after last entry in current table
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call split77(msg,nwords,nw,w) !Parse msg into words
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msg0(i,j,1)=trim(w(1))//' '//trim(w(2))
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msg0(i,j,1)=trim(w(1))//' '//trim(w(2)) !Save "call_1 call_2"
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if(w(1)(1:3).eq.'CQ ' .and. nw(2).le.2) then
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msg0(i,j,1)='CQ '//trim(w(2))//' '//trim(w(3))
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msg0(i,j,1)='CQ '//trim(w(2))//' '//trim(w(3)) !Save "CQ DX Call_2"
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endif
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msg1=msg0(i,j,1) !Message without grid
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nn=len(trim(msg1)) !Message length without grid
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! Include grid as part of message
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if(isgrid4(w(nwords))) msg0(i,j,1)=trim(msg0(i,j,1))//' '//trim(w(nwords))
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! If a transmission at this frequency with this message fragment
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! If a transmission at this frequency with message fragment "call_1 call_2"
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! was decoded in the previous sequence, flag it as "DO NOT USE" because
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! we have already decoded that station's next transmission.
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! we have already decoded and subtracted that station's next transmission.
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call split77(msg1,nwords,nw,w) !Parse msg into words
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call split77(msg0(i,j,1),nwords,nw,w) !Parse msg into words
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do i=1,ndec(j,0)
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if(f0(i,j,0).le.-98.0) cycle
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i2=index(msg0(i,j,0),' '//trim(w(2)))
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if(abs(f-f0(i,j,0)).lt.2.0 .and. i2.ge.3) then
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f0(i,j,0)=-98.0 !Remove from list of to-be-tried a7 decodes
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if(abs(f-f0(i,j,0)).le.3.0 .and. i2.ge.3) then
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f0(i,j,0)=-98.0 !Flag as "do not use" for a potential a7 decode
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endif
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enddo
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@ -73,6 +72,8 @@ end subroutine ft8_a7_save
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subroutine ft8_a7d(dd0,newdat,call_1,call_2,grid4,xdt,f1,nharderrors,dmin, &
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msg37,xsnr)
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! Examine the raw data in dd0() for possible "a7" decodes.
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use crc
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use timer_module, only: timer
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use packjt77
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@ -84,8 +85,9 @@ subroutine ft8_a7d(dd0,newdat,call_1,call_2,grid4,xdt,f1,nharderrors,dmin, &
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real a(5)
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real s8(0:7,NN)
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real s2(0:511)
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real dabcd(4)
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real bmeta(174),bmetb(174),bmetc(174),bmetd(174)
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real llra(174),llrb(174),llrc(174),llrd(174),llrbest(174) !Soft symbols
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real llra(174),llrb(174),llrc(174),llrd(174) !Soft symbols
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real dd0(15*12000)
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real ss(9)
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real rcw(174)
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@ -94,6 +96,7 @@ subroutine ft8_a7d(dd0,newdat,call_1,call_2,grid4,xdt,f1,nharderrors,dmin, &
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integer*1 nxor(174),hdec(174)
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integer itone(NN)
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integer icos7(0:6),ip(1)
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integer ndm(4)
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logical one(0:511,0:8)
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integer graymap(0:7)
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integer iloc(1)
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@ -103,10 +106,10 @@ subroutine ft8_a7d(dd0,newdat,call_1,call_2,grid4,xdt,f1,nharderrors,dmin, &
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complex cs(0:7,NN)
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logical std_1,std_2
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logical first,newdat
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data icos7/3,1,4,0,6,5,2/ ! Flipped w.r.t. original FT8 sync array
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data icos7/3,1,4,0,6,5,2/ !Sync array
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data first/.true./
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data graymap/0,1,3,2,5,6,4,7/
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save one
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save one,ndm
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if(first) then
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one=.false.
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@ -116,13 +119,13 @@ subroutine ft8_a7d(dd0,newdat,call_1,call_2,grid4,xdt,f1,nharderrors,dmin, &
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enddo
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enddo
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first=.false.
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ndm=0
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endif
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call stdcall(call_1,std_1)
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if(call_1(1:3).eq.'CQ ') std_1=.true.
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call stdcall(call_2,std_2)
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nharderrors=-1
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fs2=12000.0/NDOWN
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dt2=1.0/fs2
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twopi=8.0*atan(1.0)
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@ -135,15 +138,15 @@ subroutine ft8_a7d(dd0,newdat,call_1,call_2,grid4,xdt,f1,nharderrors,dmin, &
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i0=nint((xdt+0.5)*fs2) !Initial guess for start of signal
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smax=0.0
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do idt=i0-10,i0+10 !Search over +/- one quarter symbol
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call sync8d(cd0,idt,ctwk,0,sync)
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do idt=i0-10,i0+10 !Search over +/- one quarter symbol
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call sync8d(cd0,idt,ctwk,0,sync) !NB: ctwk not used here
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if(sync.gt.smax) then
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smax=sync
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ibest=idt
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endif
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enddo
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! Now peak up in frequency
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! Peak up in frequency
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smax=0.0
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do ifr=-5,5 !Search over +/- 2.5 Hz
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delf=ifr*0.5
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@ -268,6 +271,8 @@ subroutine ft8_a7d(dd0,newdat,call_1,call_2,grid4,xdt,f1,nharderrors,dmin, &
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MAXMSG=206
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pbest=0.
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dmin=1.e30
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nharderrors=-1
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do imsg=1,MAXMSG
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msg=trim(call_1)//' '//trim(call_2)
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i=imsg
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@ -303,11 +308,10 @@ subroutine ft8_a7d(dd0,newdat,call_1,call_2,grid4,xdt,f1,nharderrors,dmin, &
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endif
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endif
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! Source-encode, then get codeword
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i3=-1
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n3=-1
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call genft8(msg,i3,n3,msgsent,msgbits,itone)
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call encode174_91(msgbits,cw)
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call genft8(msg,i3,n3,msgsent,msgbits,itone) !Source-encode this message
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call encode174_91(msgbits,cw) !Get codeword for this message
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rcw=2*cw-1
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pa=sum(llra*rcw)
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pb=sum(llrb*rcw)
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@ -319,21 +323,165 @@ subroutine ft8_a7d(dd0,newdat,call_1,call_2,grid4,xdt,f1,nharderrors,dmin, &
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nxor=ieor(hdec,cw)
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da=sum(nxor*abs(llra))
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if(da.lt.dmin) then
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dmin=da
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pbest=pa
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hdec=0
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where(llrb.ge.0.0) hdec=1
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nxor=ieor(hdec,cw)
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db=sum(nxor*abs(llrb))
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hdec=0
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where(llrc.ge.0.0) hdec=1
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nxor=ieor(hdec,cw)
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dc=sum(nxor*abs(llrc))
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hdec=0
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where(llrd.ge.0.0) hdec=1
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nxor=ieor(hdec,cw)
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dd=sum(nxor*abs(llrd))
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dm=min(da,db,dc,dd)
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if(dm.lt.dmin) then
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dmin=dm
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dabcd(1)=da
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dabcd(2)=db
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dabcd(3)=dc
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dabcd(4)=dd
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msgbest=msgsent
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llrbest=llra
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nharderrors=count((2*cw-1)*llra.lt.0.0)
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if(dmin.le.60.0) nharderrors=count((2*cw-1)*llra.lt.0.0)
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endif
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enddo ! imsg
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write(41,3041) nharderrors,pbest,dmin,trim(msgbest)
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3041 format(i5,2f10.3,2x,a)
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if(dmin.le.60.0) then
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if(dmin.eq.dabcd(1)) ndm(1)=ndm(1)+1
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if(dmin.eq.dabcd(2)) ndm(2)=ndm(2)+1
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if(dmin.eq.dabcd(3)) ndm(3)=ndm(3)+1
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if(dmin.eq.dabcd(4)) ndm(4)=ndm(4)+1
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! write(41,3041) nharderrors,dmin,dabcd,ndm,ibest,delfbest,trim(msgbest)
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!3041 format(i5,5f8.2,4i4,i5,f7.1,1x,a)
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! else
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! f00=0.0
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! call ft8q3(cd0,xdt,f00,call_1,call_2,grid4,msgbest,snr)
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! if(snr.gt.5.0) then
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! nharderrors=0
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! dmin=0.
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! xsnr=snr-25.0
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! endif
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endif
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msg37=msgbest
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return
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end subroutine ft8_a7d
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subroutine ft8q3(cd,xdt,f0,call_1,call_2,grid4,msgbest,snr)
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! Get q3-style decodes for FT8.
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use packjt77
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parameter(NN=79,NSPS=32)
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parameter(NWAVE=NN*NSPS) !2528
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parameter(NZ=3200,NLAGS=NZ-NWAVE)
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character*12 call_1,call_2
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character*4 grid4
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character*37 msg,msgbest,msgsent
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character c77*77
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complex cwave(0:NWAVE-1)
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complex cd(0:NZ-1)
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complex z
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real xjunk(NWAVE)
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real ccf(0:NLAGS-1)
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real ccfmsg(206)
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integer itone(NN)
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integer*1 msgbits(77)
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logical std_1,std_2
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if(xdt.eq.-99.0) return !Silence compiler warning
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call stdcall(call_1,std_1)
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call stdcall(call_2,std_2)
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fs=200.0 !Sample rate (Hz)
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dt=1.0/fs !Sample interval (s)
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bt=2.0
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ccfbest=0.
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lagbest=-1
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do imsg=1,206
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msg=trim(call_1)//' '//trim(call_2)
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i=imsg
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if(.not.std_1) then
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if(i.eq.1 .or. i.ge.6) msg='<'//trim(call_1)//'> '//trim(call_2)
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if(i.ge.2 .and. i.le.4) msg=trim(call_1)//' <'//trim(call_2)//'>'
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else if(.not.std_2) then
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if(i.le.4 .or. i.eq.6) msg='<'//trim(call_1)//'> '//trim(call_2)
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if(i.ge.7) msg=trim(call_1)//' <'//trim(call_2)//'>'
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endif
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j0=len(trim(msg))+2
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if(i.eq.2) msg(j0:j0+2)='RRR'
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if(i.eq.3) msg(j0:j0+3)='RR73'
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if(i.eq.4) msg(j0:j0+1)='73'
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if(i.eq.5) then
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if(std_2) msg='CQ '//trim(call_2)//' '//grid4
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if(.not.std_2) msg='CQ '//trim(call_2)
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endif
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if(i.eq.6 .and. std_2) msg(j0:j0+3)=grid4
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if(i.ge.7 .and. i.le.206) then
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isnr = -50 + (i-7)/2
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if(iand(i,1).eq.1) then
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write(msg(j0:j0+2),'(i3.2)') isnr
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if(msg(j0:j0).eq.' ') msg(j0:j0)='+'
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else
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write(msg(j0:j0+3),'("R",i3.2)') isnr
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if(msg(j0+1:j0+1).eq.' ') msg(j0+1:j0+1)='+'
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endif
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endif
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! Source-encode, then get itone()
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i3=-1
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n3=-1
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call pack77(msg,i3,n3,c77)
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call genft8(msg,i3,n3,msgsent,msgbits,itone)
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! Generate complex cwave
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call gen_ft8wave(itone,NN,NSPS,bt,fs,f0,cwave,xjunk,1,NWAVE)
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lagmax=-1
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ccfmax=0.
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nsum=32*2
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do lag=0,nlags-1
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z=0.
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s=0.
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do i=0,NWAVE-1
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z=z + cd(i+lag)*conjg(cwave(i))
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if(mod(i,nsum).eq.nsum-1 .or. i.eq.NWAVE-1) then
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s=s + abs(z)
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z=0.
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endif
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enddo
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ccf(lag)=s
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if(ccf(lag).gt.ccfmax) then
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ccfmax=ccf(lag)
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lagmax=lag
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endif
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enddo ! lag
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ccfmsg(imsg)=ccfmax
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if(ccfmax.gt.ccfbest) then
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ccfbest=ccfmax
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lagbest=lagmax
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msgbest=msg
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endif
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enddo ! imsg
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call pctile(ccfmsg,207,50,base)
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call pctile(ccfmsg,207,67,sigma)
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sigma=sigma-base
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ccfmsg=(ccfmsg-base)/sigma
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! do imsg=1,207
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! write(44,3044) imsg,ccfmsg(imsg)
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!3044 format(i5,f10.3)
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! enddo
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snr=maxval(ccfmsg)
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return
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end subroutine ft8q3
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end module ft8_a7
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@ -220,7 +220,7 @@ contains
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qual=1.0-(nharderrors+dmin)/60.0 ! scale qual to [0.0,1.0]
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if(emedelay.ne.0) xdt=xdt+2.0
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call this%callback(sync,nsnr,xdt,f1,msg37,iaptype,qual)
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call ft8_a7_save(nutc,xdt,f1,msg37)
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call ft8_a7_save(nutc,xdt,f1,msg37) !Enter decode in table
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! ii=ndec(jseq,1)
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! write(41,3041) jseq,ii,nint(f0(ii,jseq,0)),msg0(ii,jseq,0)(1:22),&
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! nint(f0(ii,jseq,1)),msg0(ii,jseq,1)(1:22)
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@ -260,13 +260,16 @@ contains
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call timer('ft8_a7d ',1)
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! write(51,3051) i,xdt,nint(f1),nharderrors,dmin,call_1,call_2,grid4
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!3051 format(i3,f7.2,2i5,f7.1,1x,a12,a12,1x,a4)
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if(nharderrors.ge.0 .and. dmin.le.80.0) then
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if(nharderrors.ge.0) then
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if(associated(this%callback)) then
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nsnr=xsnr
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iaptype=7
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if(nharderrors.eq.0 .and.dmin.eq.0.0) iaptype=8
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qual=1.0
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! if(iaptype.eq.8) print*,'b',nsnr,xdt,f1,msg37,'a8'
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call this%callback(sync,nsnr,xdt,f1,msg37,iaptype,qual)
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call ft8_a7_save(nutc,xdt,f1,msg37)
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call ft8_a7_save(nutc,xdt,f1,msg37) !Enter decode in table
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endif
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! write(*,3901) xdt,nint(f1),nharderrors,dmin,trim(msg37)
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!3901 format('$$$',f6.1,i5,i5,f7.1,1x,a)
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@ -274,7 +277,8 @@ contains
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! newdat=.false.
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enddo
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endif
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! if(nzhsym.eq.50) print*,'A',ndec(0,0:1),ndec(1,0:1)
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return
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end subroutine decode
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