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Starting the transition from QRA01 to QRA02.
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@6824 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
This commit is contained in:
Joe Taylor
parent
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commit
4bc4c11b66
@ -1,23 +1,17 @@
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subroutine genqra65(msg0,ichk,msgsent,itone,itype)
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! Encodes a QRA65 message to yieild itone(1:126)
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! Encodes a QRA65 message to yield itone(1:84)
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use packjt
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character*22 msg0
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character*22 message !Message to be generated
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character*22 msgsent !Message as it will be received
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integer itone(126)
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integer itone(84)
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character*3 cok !' ' or 'OOO'
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integer dgen(13)
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integer sent(63)
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integer nprc(126)
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data nprc/1,0,0,1,1,0,0,0,1,1,1,1,1,1,0,1,0,1,0,0, &
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0,1,0,1,1,0,0,1,0,0,0,1,1,1,0,0,1,1,1,1, &
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0,1,1,0,1,1,1,1,0,0,0,1,1,0,1,0,1,0,1,1, &
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0,0,1,1,0,1,0,1,0,1,0,0,1,0,0,0,0,0,0,1, &
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1,0,0,0,0,0,0,0,1,1,0,1,0,0,1,0,1,1,0,1, &
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0,1,0,1,0,0,1,1,0,0,1,0,0,1,0,0,0,0,1,1, &
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1,1,1,1,1,1/
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integer icos7(0:6)
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data icos7/2,5,6,0,4,1,3/ !Defines a 7x7 Costas array
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save
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if(msg0(1:1).eq.'@') then
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@ -40,36 +34,16 @@ subroutine genqra65(msg0,ichk,msgsent,itone,itype)
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enddo
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call chkmsg(message,cok,nspecial,flip)
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if(nspecial.eq.0) then
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call packmsg(message,dgen,itype) !Pack message into 72 bits
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call unpackmsg(dgen,msgsent) !Unpack to get message sent
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if(ichk.ne.0) go to 999 !Return if checking only
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call packmsg(message,dgen,itype) !Pack message into 72 bits
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call unpackmsg(dgen,msgsent) !Unpack to get message sent
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if(ichk.ne.0) go to 999 !Return if checking only
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call qra65_enc(dgen,sent) !Encode using QRA65
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call qra65_enc(dgen,sent) !Encode using QRA65
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nsym=126 !Symbols per transmission
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k=0
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do j=1,nsym
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if(nprc(j).eq.0) then
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k=k+1
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itone(j)=sent(k)+2
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else
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itone(j)=0
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endif
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enddo
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else
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nsym=32
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k=0
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do j=1,nsym
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do n=1,4
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k=k+1
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if(iand(j,1).eq.1) itone(k)=0
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if(iand(j,1).eq.0) itone(k)=10*nspecial
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if(k.eq.126) go to 10
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enddo
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enddo
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10 msgsent=message
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itype=7
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endif
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itone(1:7)=icos7 !Insert 7x7 Costas array in 3 places
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itone(8:39)=sent(1:32)
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itone(40:46)=icos7
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itone(47:77)=sent(33:63)
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itone(78:84)=icos7
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endif
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999 return
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@ -9,7 +9,8 @@ program qra65sim
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parameter (NFFT=10*65536,NH=NFFT/2)
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type(hdr) h !Header for .wav file
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integer*2 iwave(NMAX) !Generated waveform
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integer*4 itone(126) !Channel symbols (values 0-65)
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! integer*4 itone(126) !Channel symbols (values 0-65)
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integer*4 itone(84) !Channel symbols (values 0-63)
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integer dgen(12) !Twelve 6-bit data symbols
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integer sent(63) !RS(63,12) codeword
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real*4 xnoise(NMAX) !Generated random noise
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@ -19,6 +20,7 @@ program qra65sim
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complex z
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real*8 f0,dt,twopi,phi,dphi,baud,fsample,freq,sps
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character msg*22,fname*11,csubmode*1,c,optarg*500,numbuf*32
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character msgsent*22
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logical :: display_help=.false.,seed_prngs=.true.
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type (option) :: long_options(8) = [ &
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option ('help',.false.,'h','Display this help message',''), &
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@ -30,15 +32,6 @@ program qra65sim
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option ('no-prng-seed',.false.,'p','Do not seed PRNGs (use for reproducible tests)',''), &
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option ('strength',.true.,'s','S/N in dB (2500Hz reference b/w), default SNR=0','SNR') ]
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integer nprc(126) !Sync pattern
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data nprc/1,0,0,1,1,0,0,0,1,1,1,1,1,1,0,1,0,1,0,0, &
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0,1,0,1,1,0,0,1,0,0,0,1,1,1,0,0,1,1,1,1, &
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0,1,1,0,1,1,1,1,0,0,0,1,1,0,1,0,1,0,1,1, &
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0,0,1,1,0,1,0,1,0,1,0,0,1,0,0,0,0,0,0,1, &
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1,0,0,0,0,0,0,0,1,1,0,1,0,0,1,0,1,1,0,1, &
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0,1,0,1,0,0,1,1,0,0,1,0,0,1,0,0,0,0,1,1, &
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1,1,1,1,1,1/
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! Default parameters:
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csubmode='A'
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mode65=1
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@ -115,14 +108,15 @@ program qra65sim
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dt=1.d0/fsample !Sample interval (s)
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twopi=8.d0*atan(1.d0)
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npts=54*12000 !Total samples in .wav file
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baud=11025.d0/4096.d0 !Keying rate
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sps=12000.d0/baud !Samples per symbol, at fsample=12000 Hz
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nsym=126 !Number of channel symbols
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nsps=6912
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! baud=11025.d0/4096.d0 !Keying rate
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baud=12000.d0/6912 !Keying rate = 1.7361111111
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! sps=12000.d0/baud !Samples per symbol, at fsample=12000 Hz
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! nsym=126 !Number of channel symbols
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nsym=84 !Number of channel symbols
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h=default_header(12000,npts)
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dfsig=2000.0/nsigs !Freq spacing between sigs in file (Hz)
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print*,'A',nsigs,nfiles
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do ifile=1,nfiles !Loop over requested number of files
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write(fname,1002) ifile !Output filename
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1002 format('000000_',i4.4)
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@ -145,21 +139,15 @@ program qra65sim
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if(csubmode.eq.'B' .and. snrdb.eq.0.0) xsnr=-21 - isig
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if(csubmode.eq.'C' .and. snrdb.eq.0.0) xsnr=-21 - isig
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call packmsg(msg,dgen,itype) !Pack message into 12 six-bit bytes
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call qra65_enc(dgen,sent) !Encode using QRA65
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! call qra65_dec(sent,dgen,ierr) !Decode (### for test only ###)
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! write(*,3001) sent
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!3001 format(21i3)
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xsnr=xsnr+5 !### TEMPORARY ###
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k=0
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do j=1,nsym !Insert sync and data into itone()
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if(nprc(j).eq.0) then
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k=k+1
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itone(j)=sent(k)+2
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else
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itone(j)=0
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endif
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enddo
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call genqra65(msg,ichk,msgsent,itone,itype)
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! call packmsg(msg,dgen,itype) !Pack message into 12 six-bit bytes
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! call qra65_enc(dgen,sent) !Encode using QRA65
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!! call qra65_dec(sent,dgen,ierr) !Decode (### for test only ###)
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!! write(*,3001) sent
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!!3001 format(21i3)
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bandwidth_ratio=2500.0/6000.0
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sig=sqrt(2*bandwidth_ratio)*10.0**(0.05*xsnr)
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@ -172,7 +160,7 @@ program qra65sim
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k=12000 + xdt*12000 !Start audio at t = xdt + 1.0 s
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isym0=-99
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do i=1,npts !Add this signal into cdat()
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isym=floor(i/sps)+1
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isym=i/nsps + 1
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if(isym.gt.nsym) exit
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if(isym.ne.isym0) then
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freq=f0 + itone(isym)*baud*mode65
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@ -1,7 +1,7 @@
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subroutine slope(y,npts,xpk)
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! Remove best-fit slope from data in y(i). When fitting the straight line,
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! ignore the peak around xpk +/- nhw
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! ignore the peak around xpk +/- 2 bins
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real y(npts)
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52
lib/t1.f90
52
lib/t1.f90
@ -1,52 +0,0 @@
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program t1
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parameter (NFFT=1024,NH=NFFT/2)
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real w(-24:24)
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real x(0:NFFT-1)
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complex cx(0:NH)
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equivalence (x,cx)
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! FIR lowpass filter designed using ScopeFIR
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! fsample = 48000 Hz
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! Ntaps = 49
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! fc = 4500 Hz
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! fstop = 6000 Hz
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! Ripple = 1 dB
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! Stop Atten = 40 dB
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! fout = 12000 Hz
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! Filter coefficients:
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data w/ &
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0.000861074040, 0.010051920210, 0.010161983649, 0.011363155076, &
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0.008706594219, 0.002613872664,-0.005202883094,-0.011720748164, &
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-0.013752163325,-0.009431602741, 0.000539063909, 0.012636767098, &
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0.021494659597, 0.021951235065, 0.011564169382,-0.007656470131, &
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-0.028965787341,-0.042637874109,-0.039203309748,-0.013153301537, &
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0.034320769178, 0.094717832646, 0.154224604789, 0.197758325022, &
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0.213715139513, 0.197758325022, 0.154224604789, 0.094717832646, &
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0.034320769178,-0.013153301537,-0.039203309748,-0.042637874109, &
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-0.028965787341,-0.007656470131, 0.011564169382, 0.021951235065, &
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0.021494659597, 0.012636767098, 0.000539063909,-0.009431602741, &
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-0.013752163325,-0.011720748164,-0.005202883094, 0.002613872664, &
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0.008706594219, 0.011363155076, 0.010161983649, 0.010051920210, &
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0.000861074040/
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x=0.
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do i=-24,24
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j=i
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if(j.lt.0) j=j+NFFT
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x(j)=w(i)
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enddo
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call four2a(x,NFFT,1,-1,0) !r2c FFT
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df=48000.0/NFFT
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do i=0,NH
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y=abs(cx(i))
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s=y*y
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f=i*df
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write(13,1000) f,y,s,db(s),cx(i)
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1000 format(6f12.6)
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enddo
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end program t1
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