2020-02-13 15:05:37 -05:00
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subroutine ft8b(dd0,newdat,nQSOProgress,nfqso,nftx,ndepth,nzhsym,lapon, &
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lapcqonly,napwid,lsubtract,nagain,ncontest,iaptype,mycall12,hiscall12, &
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2020-03-19 11:27:57 -04:00
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f1,xdt,xbase,apsym,aph10,nharderrors,dmin,nbadcrc,ipass, &
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2020-02-13 15:05:37 -05:00
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msg37,xsnr,itone)
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2017-06-19 16:15:43 -04:00
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2017-12-08 12:03:11 -05:00
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use crc
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2017-06-30 16:11:07 -04:00
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use timer_module, only: timer
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2018-07-05 14:07:17 -04:00
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use packjt77
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2017-06-19 16:15:43 -04:00
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include 'ft8_params.f90'
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2018-01-30 10:25:10 -05:00
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parameter(NP2=2812)
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2018-12-05 17:06:33 -05:00
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character*37 msg37
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2018-12-20 16:08:29 -05:00
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character*12 mycall12,hiscall12
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2018-07-04 11:15:01 -04:00
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character*77 c77
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2017-07-01 09:08:30 -04:00
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real a(5)
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2018-06-26 12:11:58 -04:00
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real s8(0:7,NN)
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2018-12-16 12:55:36 -05:00
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real s2(0:511)
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2020-02-17 11:53:52 -05:00
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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),llrz(174) !Soft symbols
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2017-07-01 09:08:30 -04:00
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real dd0(15*12000)
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2020-02-29 14:46:59 -05:00
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real ss(9)
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2018-09-28 15:13:58 -04:00
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integer*1 message77(77),apmask(174),cw(174)
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2020-02-03 11:48:51 -05:00
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integer apsym(58),aph10(10)
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2020-01-24 12:26:36 -05:00
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integer mcq(29),mcqru(29),mcqfd(29),mcqtest(29),mcqww(29)
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2018-10-04 17:40:45 -04:00
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integer mrrr(19),m73(19),mrr73(19)
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2017-07-01 09:08:30 -04:00
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integer itone(NN)
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2017-07-25 16:55:13 -04:00
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integer icos7(0:6),ip(1)
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2017-12-18 14:07:10 -05:00
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integer nappasses(0:5) !Number of decoding passes to use for each QSO state
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2017-07-27 11:35:40 -04:00
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integer naptypes(0:5,4) ! (nQSOProgress, decoding pass) maximum of 4 passes for now
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2018-09-28 15:13:58 -04:00
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integer ncontest,ncontest0
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2018-06-27 10:55:34 -04:00
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logical one(0:511,0:8)
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2018-06-25 18:01:34 -04:00
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integer graymap(0:7)
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2020-02-29 14:46:59 -05:00
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integer iloc(1)
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2018-06-30 15:56:19 -04:00
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complex cd0(0:3199)
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2017-07-01 09:08:30 -04:00
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complex ctwk(32)
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complex csymb(32)
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2018-06-22 12:20:28 -04:00
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complex cs(0:7,NN)
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2018-09-12 16:06:26 -04:00
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logical first,newdat,lsubtract,lapon,lapcqonly,nagain,unpk77_success
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2018-06-05 17:37:29 -04:00
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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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2018-10-04 17:40:45 -04:00
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data mcq/0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0/
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data mcqru/0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,1,1,1,0,0,1,1,0,0/
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data mcqfd/0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,1,0,0,1,0,0,0,1,0/
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data mcqtest/0,0,0,0,0,0,0,0,0,1,1,0,0,0,0,1,0,1,0,1,1,1,1,1,1,0,0,1,0/
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2020-01-24 12:26:36 -05:00
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data mcqww/0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,1,1,0,1,1,1,1,0/
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2018-10-04 17:40:45 -04:00
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data mrrr/0,1,1,1,1,1,1,0,1,0,0,1,0,0,1,0,0,0,1/
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data m73/0,1,1,1,1,1,1,0,1,0,0,1,0,1,0,0,0,0,1/
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data mrr73/0,1,1,1,1,1,1,0,0,1,1,1,0,1,0,1,0,0,1/
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2017-07-27 11:35:40 -04:00
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data first/.true./
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2018-07-07 09:18:31 -04:00
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data graymap/0,1,3,2,5,6,4,7/
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2018-12-20 16:08:29 -05:00
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save nappasses,naptypes,ncontest0,one
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2017-07-27 11:35:40 -04:00
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2018-09-28 15:13:58 -04:00
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if(first.or.(ncontest.ne.ncontest0)) then
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2017-07-27 11:35:40 -04:00
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mcq=2*mcq-1
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2018-10-04 17:40:45 -04:00
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mcqfd=2*mcqfd-1
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2018-09-28 15:13:58 -04:00
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mcqru=2*mcqru-1
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2018-10-04 17:40:45 -04:00
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mcqtest=2*mcqtest-1
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2020-01-24 12:26:36 -05:00
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mcqww=2*mcqww-1
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2017-07-27 11:35:40 -04:00
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mrrr=2*mrrr-1
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m73=2*m73-1
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mrr73=2*mrr73-1
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nappasses(0)=2
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nappasses(1)=2
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nappasses(2)=2
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nappasses(3)=4
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nappasses(4)=4
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nappasses(5)=3
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! iaptype
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!------------------------
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2018-07-28 18:32:45 -04:00
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! 1 CQ ??? ??? (29+3=32 ap bits)
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! 2 MyCall ??? ??? (29+3=32 ap bits)
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! 3 MyCall DxCall ??? (58+3=61 ap bits)
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! 4 MyCall DxCall RRR (77 ap bits)
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! 5 MyCall DxCall 73 (77 ap bits)
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! 6 MyCall DxCall RR73 (77 ap bits)
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2017-07-27 11:35:40 -04:00
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2018-10-02 17:20:22 -04:00
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naptypes(0,1:4)=(/1,2,0,0/) ! Tx6 selected (CQ)
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naptypes(1,1:4)=(/2,3,0,0/) ! Tx1
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naptypes(2,1:4)=(/2,3,0,0/) ! Tx2
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naptypes(3,1:4)=(/3,4,5,6/) ! Tx3
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naptypes(4,1:4)=(/3,4,5,6/) ! Tx4
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naptypes(5,1:4)=(/3,1,2,0/) ! Tx5
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2018-06-25 18:01:34 -04:00
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2018-06-27 10:55:34 -04:00
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one=.false.
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2018-06-25 18:01:34 -04:00
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do i=0,511
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do j=0,8
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2018-06-27 16:11:39 -04:00
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if(iand(i,2**j).ne.0) one(i,j)=.true.
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2018-06-25 18:01:34 -04:00
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enddo
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enddo
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2017-07-27 11:35:40 -04:00
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first=.false.
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2018-09-28 15:13:58 -04:00
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ncontest0=ncontest
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2017-07-27 11:35:40 -04:00
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endif
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2017-07-21 23:01:09 -04:00
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2020-02-03 11:48:51 -05:00
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dxcall13=hiscall12 ! initialize for use in packjt77
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2019-01-03 15:02:17 -05:00
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mycall13=mycall12
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2018-08-29 14:18:56 -04:00
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2017-07-12 17:49:39 -04:00
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max_iterations=30
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nharderrors=-1
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2018-06-17 13:11:32 -04:00
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nbadcrc=1 ! this is used upstream to flag good decodes.
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2017-07-06 10:19:39 -04:00
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fs2=12000.0/NDOWN
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2017-07-06 08:07:17 -04:00
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dt2=1.0/fs2
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twopi=8.0*atan(1.0)
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delfbest=0.
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ibest=0
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2017-07-01 16:47:59 -04:00
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call timer('ft8_down',0)
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2017-07-06 08:07:17 -04:00
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call ft8_downsample(dd0,newdat,f1,cd0) !Mix f1 to baseband and downsample
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2017-07-01 16:47:59 -04:00
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call timer('ft8_down',1)
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2017-06-19 16:15:43 -04:00
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2017-07-27 14:07:54 -04:00
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i0=nint((xdt+0.5)*fs2) !Initial guess for start of signal
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2017-07-01 09:08:30 -04:00
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smax=0.0
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2020-02-29 14:46:59 -05:00
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do idt=i0-10,i0+10 !Search over +/- one quarter symbol
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2018-11-05 11:59:48 -05:00
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call sync8d(cd0,idt,ctwk,0,sync)
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2017-07-06 08:07:17 -04:00
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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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2017-07-01 09:08:30 -04:00
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enddo
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2017-07-06 08:07:17 -04:00
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! Now peak up in frequency
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2017-07-01 09:08:30 -04:00
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smax=0.0
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2017-07-06 08:07:17 -04:00
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do ifr=-5,5 !Search over +/- 2.5 Hz
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2017-07-01 09:08:30 -04:00
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delf=ifr*0.5
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dphi=twopi*delf*dt2
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phi=0.0
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do i=1,32
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ctwk(i)=cmplx(cos(phi),sin(phi))
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phi=mod(phi+dphi,twopi)
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enddo
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2020-02-29 14:46:59 -05:00
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call sync8d(cd0,ibest,ctwk,1,sync)
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2017-07-01 09:08:30 -04:00
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if( sync .gt. smax ) then
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smax=sync
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delfbest=delf
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endif
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enddo
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a=0.0
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a(1)=-delfbest
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call twkfreq1(cd0,NP2,fs2,a,cd0)
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2017-07-06 08:07:17 -04:00
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f1=f1+delfbest !Improved estimate of DF
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2020-02-29 14:46:59 -05:00
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call timer('ft8_down',0)
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call ft8_downsample(dd0,.false.,f1,cd0) !Mix f1 to baseband and downsample
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call timer('ft8_down',1)
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smax=0.0
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do idt=-4,4 !Search over +/- one quarter symbol
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call sync8d(cd0,ibest+idt,ctwk,0,sync)
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ss(idt+5)=sync
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enddo
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smax=maxval(ss)
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iloc=maxloc(ss)
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ibest=iloc(1)-5+ibest
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xdt=(ibest-1)*dt2
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sync=smax
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2017-06-19 16:15:43 -04:00
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2017-06-27 15:44:12 -04:00
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do k=1,NN
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2017-07-01 09:08:30 -04:00
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i1=ibest+(k-1)*32
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2017-07-01 09:45:16 -04:00
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csymb=cmplx(0.0,0.0)
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2018-06-30 15:56:19 -04:00
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if( i1.ge.0 .and. i1+31 .le. NP2-1 ) csymb=cd0(i1:i1+31)
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2017-07-01 09:08:30 -04:00
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call four2a(csymb,32,1,-1,1)
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2018-06-26 12:11:58 -04:00
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cs(0:7,k)=csymb(1:8)/1e3
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s8(0:7,k)=abs(csymb(1:8))
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2017-07-01 09:08:30 -04:00
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enddo
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2017-07-26 09:05:34 -04:00
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2017-07-25 16:55:13 -04:00
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! sync quality check
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is1=0
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is2=0
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is3=0
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do k=1,7
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2018-06-22 12:20:28 -04:00
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ip=maxloc(s8(:,k))
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2017-07-25 16:55:13 -04:00
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if(icos7(k-1).eq.(ip(1)-1)) is1=is1+1
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2018-06-22 12:20:28 -04:00
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ip=maxloc(s8(:,k+36))
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2017-07-25 16:55:13 -04:00
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if(icos7(k-1).eq.(ip(1)-1)) is2=is2+1
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2018-06-22 12:20:28 -04:00
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ip=maxloc(s8(:,k+72))
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2017-07-25 16:55:13 -04:00
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if(icos7(k-1).eq.(ip(1)-1)) is3=is3+1
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enddo
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! hard sync sum - max is 21
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nsync=is1+is2+is3
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if(nsync .le. 6) then ! bail out
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nbadcrc=1
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return
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endif
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2017-07-26 09:05:34 -04:00
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2018-06-26 12:11:58 -04:00
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do nsym=1,3
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nt=2**(3*nsym)
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do ihalf=1,2
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do k=1,29,nsym
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if(ihalf.eq.1) ks=k+7
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if(ihalf.eq.2) ks=k+43
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amax=-1.0
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do i=0,nt-1
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i1=i/64
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i2=iand(i,63)/8
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i3=iand(i,7)
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if(nsym.eq.1) then
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s2(i)=abs(cs(graymap(i3),ks))
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elseif(nsym.eq.2) then
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s2(i)=abs(cs(graymap(i2),ks)+cs(graymap(i3),ks+1))
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elseif(nsym.eq.3) then
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s2(i)=abs(cs(graymap(i1),ks)+cs(graymap(i2),ks+1)+cs(graymap(i3),ks+2))
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else
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print*,"Error - nsym must be 1, 2, or 3."
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endif
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enddo
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i32=1+(k-1)*3+(ihalf-1)*87
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2018-06-27 16:11:39 -04:00
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if(nsym.eq.1) ibmax=2
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if(nsym.eq.2) ibmax=5
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if(nsym.eq.3) ibmax=8
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do ib=0,ibmax
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bm=maxval(s2(0:nt-1),one(0:nt-1,ibmax-ib)) - &
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maxval(s2(0:nt-1),.not.one(0:nt-1,ibmax-ib))
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if(i32+ib .gt.174) cycle
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if(nsym.eq.1) then
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bmeta(i32+ib)=bm
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2020-02-17 11:53:52 -05:00
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den=max(maxval(s2(0:nt-1),one(0:nt-1,ibmax-ib)), &
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maxval(s2(0:nt-1),.not.one(0:nt-1,ibmax-ib)))
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if(den.gt.0.0) then
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cm=bm/den
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else ! erase it
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cm=0.0
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endif
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bmetd(i32+ib)=cm
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2018-06-27 16:11:39 -04:00
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elseif(nsym.eq.2) then
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bmetb(i32+ib)=bm
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elseif(nsym.eq.3) then
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bmetc(i32+ib)=bm
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endif
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enddo
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2018-06-22 12:20:28 -04:00
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enddo
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enddo
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enddo
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2018-09-28 15:13:58 -04:00
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call normalizebmet(bmeta,174)
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call normalizebmet(bmetb,174)
|
|
|
|
|
call normalizebmet(bmetc,174)
|
2020-02-17 11:53:52 -05:00
|
|
|
call normalizebmet(bmetd,174)
|
2017-07-15 10:21:18 -04:00
|
|
|
|
2017-09-17 11:34:32 -04:00
|
|
|
scalefac=2.83
|
2018-06-11 16:10:44 -04:00
|
|
|
llra=scalefac*bmeta
|
|
|
|
|
llrb=scalefac*bmetb
|
2018-06-22 12:20:28 -04:00
|
|
|
llrc=scalefac*bmetc
|
2020-02-17 11:53:52 -05:00
|
|
|
llrd=scalefac*bmetd
|
2018-06-26 12:11:58 -04:00
|
|
|
|
2018-09-28 15:13:58 -04:00
|
|
|
apmag=maxval(abs(llra))*1.01
|
2017-07-14 12:02:01 -04:00
|
|
|
|
2017-07-27 11:35:40 -04:00
|
|
|
! pass #
|
|
|
|
|
!------------------------------
|
2018-07-28 18:32:45 -04:00
|
|
|
! 1 regular decoding, nsym=1
|
|
|
|
|
! 2 regular decoding, nsym=2
|
|
|
|
|
! 3 regular decoding, nsym=3
|
2020-02-17 11:53:52 -05:00
|
|
|
! 4 regular decoding, nsym=1, bit-by-bit normalized
|
|
|
|
|
! 5 ap pass 1, nsym=1
|
|
|
|
|
! 6 ap pass 2
|
|
|
|
|
! 7 ap pass 3
|
|
|
|
|
! 8 ap pass 4
|
2017-07-27 11:35:40 -04:00
|
|
|
|
2020-01-24 12:26:36 -05:00
|
|
|
if(lapon.or.ncontest.eq.7) then !Hounds always use AP
|
2017-12-03 19:46:19 -05:00
|
|
|
if(.not.lapcqonly) then
|
2020-02-17 11:53:52 -05:00
|
|
|
npasses=4+nappasses(nQSOProgress)
|
2017-12-03 19:46:19 -05:00
|
|
|
else
|
2020-02-17 11:53:52 -05:00
|
|
|
npasses=5
|
2017-12-03 19:46:19 -05:00
|
|
|
endif
|
2017-07-27 14:07:54 -04:00
|
|
|
else
|
2020-02-17 11:53:52 -05:00
|
|
|
npasses=4
|
2017-07-27 14:07:54 -04:00
|
|
|
endif
|
2020-03-17 09:51:37 -04:00
|
|
|
if(nzhsym.lt.50) npasses=4
|
2020-02-13 15:05:37 -05:00
|
|
|
|
2018-07-28 18:32:45 -04:00
|
|
|
do ipass=1,npasses
|
2020-02-17 11:53:52 -05:00
|
|
|
llrz=llra
|
|
|
|
|
if(ipass.eq.2) llrz=llrb
|
|
|
|
|
if(ipass.eq.3) llrz=llrc
|
|
|
|
|
if(ipass.eq.4) llrz=llrd
|
|
|
|
|
if(ipass.le.4) then
|
2017-07-27 11:35:40 -04:00
|
|
|
apmask=0
|
|
|
|
|
iaptype=0
|
|
|
|
|
endif
|
2020-02-17 11:53:52 -05:00
|
|
|
if(ipass .gt. 4) then
|
|
|
|
|
llrz=llra
|
2018-07-28 18:32:45 -04:00
|
|
|
if(.not.lapcqonly) then
|
2020-02-17 11:53:52 -05:00
|
|
|
iaptype=naptypes(nQSOProgress,ipass-4)
|
2018-07-28 18:32:45 -04:00
|
|
|
else
|
|
|
|
|
iaptype=1
|
|
|
|
|
endif
|
2018-09-29 10:16:56 -04:00
|
|
|
|
2018-10-02 17:20:22 -04:00
|
|
|
! ncontest=0 : NONE
|
|
|
|
|
! 1 : NA_VHF
|
|
|
|
|
! 2 : EU_VHF
|
|
|
|
|
! 3 : FIELD DAY
|
|
|
|
|
! 4 : RTTY
|
2020-01-24 12:26:36 -05:00
|
|
|
! 5 : WW_DIGI
|
|
|
|
|
! 6 : FOX
|
|
|
|
|
! 7 : HOUND
|
2018-10-04 17:40:45 -04:00
|
|
|
!
|
|
|
|
|
! Conditions that cause us to bail out of AP decoding
|
2020-01-24 12:26:36 -05:00
|
|
|
if(ncontest.le.5 .and. iaptype.ge.3 .and. (abs(f1-nfqso).gt.napwid .and. abs(f1-nftx).gt.napwid) ) cycle
|
|
|
|
|
if(ncontest.eq.6) cycle ! No AP for Foxes
|
|
|
|
|
if(ncontest.eq.7.and.f1.gt.950.0) cycle ! Hounds use AP only for signals below 950 Hz
|
2018-10-04 17:40:45 -04:00
|
|
|
if(iaptype.ge.2 .and. apsym(1).gt.1) cycle ! No, or nonstandard, mycall
|
2020-02-03 11:48:51 -05:00
|
|
|
if(ncontest.eq.7 .and. iaptype.ge.2 .and. aph10(1).gt.1) cycle
|
2018-10-04 17:40:45 -04:00
|
|
|
if(iaptype.ge.3 .and. apsym(30).gt.1) cycle ! No, or nonstandard, dxcall
|
2018-10-02 17:20:22 -04:00
|
|
|
|
2018-10-04 17:40:45 -04:00
|
|
|
if(iaptype.eq.1) then ! CQ or CQ RU or CQ TEST or CQ FD
|
2018-07-28 18:32:45 -04:00
|
|
|
apmask=0
|
|
|
|
|
apmask(1:29)=1
|
2020-02-17 11:53:52 -05:00
|
|
|
if(ncontest.eq.0) llrz(1:29)=apmag*mcq(1:29)
|
|
|
|
|
if(ncontest.eq.1) llrz(1:29)=apmag*mcqtest(1:29)
|
|
|
|
|
if(ncontest.eq.2) llrz(1:29)=apmag*mcqtest(1:29)
|
|
|
|
|
if(ncontest.eq.3) llrz(1:29)=apmag*mcqfd(1:29)
|
|
|
|
|
if(ncontest.eq.4) llrz(1:29)=apmag*mcqru(1:29)
|
|
|
|
|
if(ncontest.eq.5) llrz(1:29)=apmag*mcqww(1:29)
|
|
|
|
|
if(ncontest.eq.7) llrz(1:29)=apmag*mcq(1:29)
|
2018-07-28 18:32:45 -04:00
|
|
|
apmask(75:77)=1
|
2020-02-17 11:53:52 -05:00
|
|
|
llrz(75:76)=apmag*(-1)
|
|
|
|
|
llrz(77)=apmag*(+1)
|
2018-07-28 18:32:45 -04:00
|
|
|
endif
|
2018-09-28 15:13:58 -04:00
|
|
|
|
|
|
|
|
if(iaptype.eq.2) then ! MyCall,???,???
|
2018-07-28 18:32:45 -04:00
|
|
|
apmask=0
|
2020-01-24 12:26:36 -05:00
|
|
|
if(ncontest.eq.0.or.ncontest.eq.1.or.ncontest.eq.5) then
|
2018-09-28 15:13:58 -04:00
|
|
|
apmask(1:29)=1
|
2020-02-17 11:53:52 -05:00
|
|
|
llrz(1:29)=apmag*apsym(1:29)
|
2018-09-28 15:13:58 -04:00
|
|
|
apmask(75:77)=1
|
2020-02-17 11:53:52 -05:00
|
|
|
llrz(75:76)=apmag*(-1)
|
|
|
|
|
llrz(77)=apmag*(+1)
|
2018-10-04 17:40:45 -04:00
|
|
|
else if(ncontest.eq.2) then
|
|
|
|
|
apmask(1:28)=1
|
2020-02-17 11:53:52 -05:00
|
|
|
llrz(1:28)=apmag*apsym(1:28)
|
2018-10-04 17:40:45 -04:00
|
|
|
apmask(72:74)=1
|
2020-02-17 11:53:52 -05:00
|
|
|
llrz(72)=apmag*(-1)
|
|
|
|
|
llrz(73)=apmag*(+1)
|
|
|
|
|
llrz(74)=apmag*(-1)
|
2018-10-04 17:40:45 -04:00
|
|
|
apmask(75:77)=1
|
2020-02-17 11:53:52 -05:00
|
|
|
llrz(75:77)=apmag*(-1)
|
2018-10-02 17:20:22 -04:00
|
|
|
else if(ncontest.eq.3) then
|
|
|
|
|
apmask(1:28)=1
|
2020-02-17 11:53:52 -05:00
|
|
|
llrz(1:28)=apmag*apsym(1:28)
|
2018-10-02 17:20:22 -04:00
|
|
|
apmask(75:77)=1
|
2020-02-17 11:53:52 -05:00
|
|
|
llrz(75:77)=apmag*(-1)
|
2018-09-28 15:13:58 -04:00
|
|
|
else if(ncontest.eq.4) then
|
|
|
|
|
apmask(2:29)=1
|
2020-02-17 11:53:52 -05:00
|
|
|
llrz(2:29)=apmag*apsym(1:28)
|
2018-09-28 15:13:58 -04:00
|
|
|
apmask(75:77)=1
|
2020-02-17 11:53:52 -05:00
|
|
|
llrz(75)=apmag*(-1)
|
|
|
|
|
llrz(76:77)=apmag*(+1)
|
2020-02-03 11:48:51 -05:00
|
|
|
else if(ncontest.eq.7) then ! ??? RR73; MyCall <Fox Call hash10> ???
|
2018-10-04 17:40:45 -04:00
|
|
|
apmask(29:56)=1
|
2020-02-17 11:53:52 -05:00
|
|
|
llrz(29:56)=apmag*apsym(1:28)
|
2020-02-03 11:48:51 -05:00
|
|
|
apmask(57:66)=1
|
2020-02-17 11:53:52 -05:00
|
|
|
llrz(57:66)=apmag*aph10(1:10)
|
2018-10-04 17:40:45 -04:00
|
|
|
apmask(72:77)=1
|
2020-02-17 11:53:52 -05:00
|
|
|
llrz(72:73)=apmag*(-1)
|
|
|
|
|
llrz(74)=apmag*(+1)
|
|
|
|
|
llrz(75:77)=apmag*(-1)
|
2018-09-28 15:13:58 -04:00
|
|
|
endif
|
|
|
|
|
endif
|
2018-09-29 10:16:56 -04:00
|
|
|
|
2018-09-28 15:13:58 -04:00
|
|
|
if(iaptype.eq.3) then ! MyCall,DxCall,???
|
|
|
|
|
apmask=0
|
2020-01-24 12:26:36 -05:00
|
|
|
if(ncontest.eq.0.or.ncontest.eq.1.or.ncontest.eq.2.or.ncontest.eq.5.or.ncontest.eq.7) then
|
2018-09-28 15:13:58 -04:00
|
|
|
apmask(1:58)=1
|
2020-02-17 11:53:52 -05:00
|
|
|
llrz(1:58)=apmag*apsym
|
2018-09-28 15:13:58 -04:00
|
|
|
apmask(75:77)=1
|
2020-02-17 11:53:52 -05:00
|
|
|
llrz(75:76)=apmag*(-1)
|
|
|
|
|
llrz(77)=apmag*(+1)
|
2018-10-02 17:20:22 -04:00
|
|
|
else if(ncontest.eq.3) then ! Field Day
|
|
|
|
|
apmask(1:56)=1
|
2020-02-17 11:53:52 -05:00
|
|
|
llrz(1:28)=apmag*apsym(1:28)
|
|
|
|
|
llrz(29:56)=apmag*apsym(30:57)
|
2018-10-04 17:40:45 -04:00
|
|
|
apmask(72:74)=1
|
2018-10-02 17:20:22 -04:00
|
|
|
apmask(75:77)=1
|
2020-02-17 11:53:52 -05:00
|
|
|
llrz(75:77)=apmag*(-1)
|
2020-01-24 12:26:36 -05:00
|
|
|
else if(ncontest.eq.4) then
|
2018-09-28 15:13:58 -04:00
|
|
|
apmask(2:57)=1
|
2020-02-17 11:53:52 -05:00
|
|
|
llrz(2:29)=apmag*apsym(1:28)
|
|
|
|
|
llrz(30:57)=apmag*apsym(30:57)
|
2018-09-28 15:13:58 -04:00
|
|
|
apmask(75:77)=1
|
2020-02-17 11:53:52 -05:00
|
|
|
llrz(75)=apmag*(-1)
|
|
|
|
|
llrz(76:77)=apmag*(+1)
|
2018-09-28 15:13:58 -04:00
|
|
|
endif
|
2018-07-28 18:32:45 -04:00
|
|
|
endif
|
2018-09-29 10:16:56 -04:00
|
|
|
|
2020-01-24 12:26:36 -05:00
|
|
|
if(iaptype.eq.5.and.ncontest.eq.7) cycle !Hound
|
2018-07-28 18:32:45 -04:00
|
|
|
if(iaptype.eq.4 .or. iaptype.eq.5 .or. iaptype.eq.6) then
|
|
|
|
|
apmask=0
|
2020-01-24 12:26:36 -05:00
|
|
|
if(ncontest.le.5 .or. (ncontest.eq.7.and.iaptype.eq.6)) then
|
2018-10-02 17:20:22 -04:00
|
|
|
apmask(1:77)=1 ! mycall, hiscall, RRR|73|RR73
|
2020-02-17 11:53:52 -05:00
|
|
|
llrz(1:58)=apmag*apsym
|
|
|
|
|
if(iaptype.eq.4) llrz(59:77)=apmag*mrrr
|
|
|
|
|
if(iaptype.eq.5) llrz(59:77)=apmag*m73
|
|
|
|
|
if(iaptype.eq.6) llrz(59:77)=apmag*mrr73
|
2020-01-24 12:26:36 -05:00
|
|
|
else if(ncontest.eq.7.and.iaptype.eq.4) then ! Hound listens for MyCall RR73;...
|
2018-10-02 17:20:22 -04:00
|
|
|
apmask(1:28)=1
|
2020-02-17 11:53:52 -05:00
|
|
|
llrz(1:28)=apmag*apsym(1:28)
|
2020-02-03 11:48:51 -05:00
|
|
|
apmask(57:66)=1
|
2020-02-17 11:53:52 -05:00
|
|
|
llrz(57:66)=apmag*aph10(1:10)
|
2018-10-02 17:20:22 -04:00
|
|
|
apmask(72:77)=1
|
2020-02-17 11:53:52 -05:00
|
|
|
llrz(72:73)=apmag*(-1)
|
|
|
|
|
llrz(74)=apmag*(1)
|
|
|
|
|
llrz(75:77)=apmag*(-1)
|
2018-10-02 17:20:22 -04:00
|
|
|
endif
|
2018-07-28 18:32:45 -04:00
|
|
|
endif
|
|
|
|
|
endif
|
2017-07-27 11:35:40 -04:00
|
|
|
|
|
|
|
|
cw=0
|
2018-06-05 17:37:29 -04:00
|
|
|
call timer('bpd174_91 ',0)
|
2020-02-17 11:53:52 -05:00
|
|
|
call bpdecode174_91(llrz,apmask,max_iterations,message77,cw,nharderrors, &
|
2020-03-17 09:51:37 -04:00
|
|
|
niterations,ncheck)
|
2018-06-05 17:37:29 -04:00
|
|
|
call timer('bpd174_91 ',1)
|
2017-07-27 11:35:40 -04:00
|
|
|
dmin=0.0
|
2020-03-17 09:51:37 -04:00
|
|
|
if(nharderrors.lt.0 .and. ncheck.le.30 .and. ndepth.ge.2) then
|
|
|
|
|
ndeep=ndepth
|
2020-02-03 11:48:51 -05:00
|
|
|
if(abs(nfqso-f1).le.napwid .or. abs(nftx-f1).le.napwid .or. ncontest.eq.7) then
|
2018-10-10 17:06:53 -04:00
|
|
|
ndeep=4
|
2017-07-14 12:02:01 -04:00
|
|
|
endif
|
2017-08-21 20:14:51 -04:00
|
|
|
if(nagain) ndeep=5
|
2018-06-05 17:37:29 -04:00
|
|
|
call timer('osd174_91 ',0)
|
2020-02-17 11:53:52 -05:00
|
|
|
call osd174_91(llrz,apmask,ndeep,message77,cw,nharderrors,dmin)
|
2018-06-05 17:37:29 -04:00
|
|
|
call timer('osd174_91 ',1)
|
2017-07-27 11:35:40 -04:00
|
|
|
endif
|
2018-07-04 17:20:12 -04:00
|
|
|
|
2018-07-03 16:59:24 -04:00
|
|
|
msg37=' '
|
2018-07-08 09:29:12 -04:00
|
|
|
if(nharderrors.lt.0 .or. nharderrors.gt.36) cycle
|
2017-07-27 11:35:40 -04:00
|
|
|
if(count(cw.eq.0).eq.174) cycle !Reject the all-zero codeword
|
2018-07-04 11:15:01 -04:00
|
|
|
write(c77,'(77i1)') message77
|
|
|
|
|
read(c77(72:74),'(b3)') n3
|
|
|
|
|
read(c77(75:77),'(b3)') i3
|
2020-04-21 13:48:47 -04:00
|
|
|
if(i3.gt.5 .or. (i3.eq.0.and.n3.gt.6)) cycle
|
2018-12-20 16:08:29 -05:00
|
|
|
call unpack77(c77,1,msg37,unpk77_success)
|
2018-09-12 16:06:26 -04:00
|
|
|
if(.not.unpk77_success) then
|
2018-07-27 10:43:58 -04:00
|
|
|
cycle
|
|
|
|
|
endif
|
2018-07-28 09:50:50 -04:00
|
|
|
nbadcrc=0 ! If we get this far: valid codeword, valid (i3,n3), nonquirky message.
|
2019-04-18 15:16:39 -04:00
|
|
|
call get_ft8_tones_from_77bits(message77,itone)
|
2020-02-28 11:25:32 -05:00
|
|
|
if(lsubtract) then
|
2020-03-06 10:38:24 -05:00
|
|
|
call timer('sub_ft8a',0)
|
2020-02-28 11:25:32 -05:00
|
|
|
call subtractft8(dd0,itone,f1,xdt,.false.)
|
2020-03-06 10:38:24 -05:00
|
|
|
call timer('sub_ft8a',1)
|
2020-02-28 11:25:32 -05:00
|
|
|
endif
|
2018-06-17 13:11:32 -04:00
|
|
|
xsig=0.0
|
|
|
|
|
xnoi=0.0
|
|
|
|
|
do i=1,79
|
2018-06-22 12:20:28 -04:00
|
|
|
xsig=xsig+s8(itone(i),i)**2
|
2018-06-17 13:11:32 -04:00
|
|
|
ios=mod(itone(i)+4,7)
|
2018-06-22 12:20:28 -04:00
|
|
|
xnoi=xnoi+s8(ios,i)**2
|
2018-06-17 13:11:32 -04:00
|
|
|
enddo
|
|
|
|
|
xsnr=0.001
|
2018-09-26 09:29:01 -04:00
|
|
|
xsnr2=0.001
|
|
|
|
|
arg=xsig/xnoi-1.0
|
|
|
|
|
if(arg.gt.0.1) xsnr=arg
|
2018-09-28 15:13:58 -04:00
|
|
|
arg=xsig/xbase/2.6e6-1.0
|
2018-09-26 09:29:01 -04:00
|
|
|
if(arg.gt.0.1) xsnr2=arg
|
2018-06-17 13:11:32 -04:00
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xsnr=10.0*log10(xsnr)-27.0
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2018-09-26 09:29:01 -04:00
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xsnr2=10.0*log10(xsnr2)-27.0
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if(.not.nagain) then
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xsnr=xsnr2
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endif
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2018-06-17 13:11:32 -04:00
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if(xsnr .lt. -24.0) xsnr=-24.0
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return
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2017-07-08 10:06:48 -04:00
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enddo
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2017-06-19 16:15:43 -04:00
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return
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2018-11-05 11:59:48 -05:00
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end subroutine ft8b
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subroutine normalizebmet(bmet,n)
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real bmet(n)
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bmetav=sum(bmet)/real(n)
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bmet2av=sum(bmet*bmet)/real(n)
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var=bmet2av-bmetav*bmetav
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if( var .gt. 0.0 ) then
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bmetsig=sqrt(var)
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else
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bmetsig=sqrt(bmet2av)
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endif
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bmet=bmet/bmetsig
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return
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end subroutine normalizebmet
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2018-06-05 17:37:29 -04:00
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2017-08-21 20:14:51 -04:00
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2018-11-05 11:59:48 -05:00
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function bessi0(x)
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! From Numerical Recipes
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real bessi0,x
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double precision p1,p2,p3,p4,p5,p6,p7,q1,q2,q3,q4,q5,q6,q7,q8,q9,y
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save p1,p2,p3,p4,p5,p6,p7,q1,q2,q3,q4,q5,q6,q7,q8,q9
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data p1,p2,p3,p4,p5,p6,p7/1.0d0,3.5156229d0,3.0899424d0,1.2067492d0, &
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0.2659732d0,0.360768d-1,0.45813d-2/
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data q1,q2,q3,q4,q5,q6,q7,q8,q9/0.39894228d0,0.1328592d-1, &
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0.225319d-2,-0.157565d-2,0.916281d-2,-0.2057706d-1, &
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0.2635537d-1,-0.1647633d-1,0.392377d-2/
|
2017-09-17 11:34:32 -04:00
|
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|
|
2018-11-05 11:59:48 -05:00
|
|
|
if (abs(x).lt.3.75) then
|
|
|
|
|
y=(x/3.75)**2
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|
|
bessi0=p1+y*(p2+y*(p3+y*(p4+y*(p5+y*(p6+y*p7)))))
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|
|
else
|
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|
|
ax=abs(x)
|
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|
|
|
y=3.75/ax
|
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|
|
bessi0=(exp(ax)/sqrt(ax))*(q1+y*(q2+y*(q3+y*(q4 &
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|
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+y*(q5+y*(q6+y*(q7+y*(q8+y*q9))))))))
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|
endif
|
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|
return
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|
end function bessi0
|
