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Working program test_ft8q3 and subroutine ft8q3().
This commit is contained in:
Joe Taylor
parent
384899754f
commit
901e9dbc38
@ -104,7 +104,8 @@ subroutine ft8b(dd0,newdat,nQSOProgress,nfqso,nftx,ndepth,nzhsym,lapon, &
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call timer('ft8_down',0)
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call ft8_downsample(dd0,newdat,f1,cd0) !Mix f1 to baseband and downsample
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call timer('ft8_down',1)
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if(f1.eq.1500.0) then
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if(abs(nint(f1)-527).le.1) then
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rewind(40)
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do i=0,3199
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write(40,3040) i,i/200.0,cd0(i)
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3040 format(i5,f10.6,2x,2f10.3)
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@ -1,84 +1,110 @@
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program ft8q3
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subroutine ft8q3(cd,xdt,f0,call_1,call_2,grid4,msgbest,snr)
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! Test q3-style decodes for FT8.
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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 arg*12
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character msg37*37
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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(207)
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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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! Get command-line argument(s)
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nargs=iargc()
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if(nargs.ne.3) then
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print*,'Usage: ft8q3 DT f0 "message"'
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go to 999
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endif
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call getarg(1,arg)
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read(arg,*) xdt !Time offset from nominal (s)
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call getarg(2,arg)
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read(arg,*) f0 !Frequency (Hz)
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call getarg(3,msg37) !Message to be transmitted
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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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bt=2.0
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ccfbest=0.
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lagbest=-1
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do imsg=1,207
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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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if(i.eq.207) msg='TNX 73 GL'
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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(msg37,i3,n3,c77)
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call genft8(msg37,i3,n3,msgsent37,msgbits,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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call gen_ft8wave(itone,NN,NSPS,bt,fs,f0,cwave,xjunk,1,NWAVE)
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do i=0,NZ-1
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read(40,3040) cd(i)
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3040 format(17x,2f10.3)
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enddo
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lagbest=-1
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ccfbest=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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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
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! ccf(lag)=abs(z)
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ccf(lag)=s
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write(42,3042) lag-100,(lag-100)/200.0,ccf(lag)
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3042 format(i5,f10.3,f10.0)
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if(ccf(lag).gt.ccfbest) then
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ccfbest=ccf(lag)
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lagbest=lag
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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
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enddo ! imsg
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z=0.
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do i=0,NWAVE-1
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z=z + cd(i+lagbest)*conjg(cwave(i))
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if(mod(i,32).eq.31) then
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amp=abs(z)**2
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pha=atan2(aimag(z),real(z))
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j=i/32
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write(43,3043) z,j,amp,pha
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3043 format(2f12.0,i6,f12.0,f12.6)
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endif
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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)/(2.5*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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999 end program ft8q3
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return
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end subroutine ft8q3
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@ -7,78 +7,35 @@ program test_ft8q3
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parameter(NWAVE=NN*NSPS) !2528
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parameter(NZ=3200,NLAGS=NZ-NWAVE)
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character arg*12
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character msg37*37
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character c77*77
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complex cwave(0:NWAVE-1)
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character*37 msg
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character*12 call_1,call_2
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character*4 grid4
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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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integer itone(NN)
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integer*1 msgbits(77)
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! Get command-line argument(s)
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nargs=iargc()
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if(nargs.ne.3) then
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print*,'Usage: ft8q3 DT f0 "message"'
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if(nargs.ne.4 .and. nargs.ne.5) then
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print*,'Usage: ft8q3 DT f0 call_1 call_2 [grid4]'
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go to 999
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endif
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call getarg(1,arg)
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read(arg,*) xdt !Time offset from nominal (s)
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call getarg(2,arg)
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read(arg,*) f0 !Frequency (Hz)
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call getarg(3,msg37) !Message to be transmitted
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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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! Source-encode, then get itone()
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i3=-1
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n3=-1
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call pack77(msg37,i3,n3,c77)
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call genft8(msg37,i3,n3,msgsent37,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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call getarg(3,call_1) !First callsign
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call getarg(4,call_2) !Second callsign
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grid4=' '
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if(nargs.eq.5) call getarg(5,grid4) !Locator for call_2
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do i=0,NZ-1
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read(40,3040) cd(i)
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3040 format(17x,2f10.3)
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enddo
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lagbest=-1
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ccfbest=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)=abs(z)
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ccf(lag)=s
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write(42,3042) lag-100,(lag-100)/200.0,ccf(lag)
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3042 format(i5,f10.3,f10.0)
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if(ccf(lag).gt.ccfbest) then
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ccfbest=ccf(lag)
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lagbest=lag
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endif
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enddo
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z=0.
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do i=0,NWAVE-1
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z=z + cd(i+lagbest)*conjg(cwave(i))
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if(mod(i,32).eq.31) then
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amp=abs(z)**2
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pha=atan2(aimag(z),real(z))
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j=i/32
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write(43,3043) z,j,amp,pha
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3043 format(2f12.0,i6,f12.0,f12.6)
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endif
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enddo
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call sec0(0,t)
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call ft8q3(cd,xdt,f0,call_1,call_2,grid4,msg,snr)
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call sec0(1,t)
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write(*,1100) t,snr,trim(msg)
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1100 format('Time:',f6.2,' S/N:',f6.1,' msg: ',a)
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999 end program test_ft8q3
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