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Add Q65 modes and optional Doppler spread to mapsim.

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This commit is contained in:
Joe Taylor 2021-05-04 15:46:00 -04:00
parent b11b925e11
commit 3f74137d32
5 changed files with 418 additions and 34 deletions
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6
CMakeLists.txt
View File

@ -1128,6 +1128,9 @@ target_link_libraries (sumsim wsjt_fort wsjt_cxx)
add_executable (q65sim lib/qra/q65/q65sim.f90)
target_link_libraries (q65sim wsjt_fort wsjt_cxx)
add_executable (q65code lib/qra/q65/q65code.f90)
target_link_libraries (q65code wsjt_fort wsjt_cxx)
add_executable (test_q65 lib/test_q65.f90)
target_link_libraries (test_q65 wsjt_fort wsjt_cxx)
@ -1563,7 +1566,8 @@ install (TARGETS jt9 wsprd fmtave fcal fmeasure
)
if(WSJT_BUILD_UTILS)
install (TARGETS ft8code jt65code jt9code jt4code msk144code fst4sim q65sim
install (TARGETS ft8code jt65code jt9code jt4code msk144code
q65code fst4sim q65sim
RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR} COMPONENT runtime
BUNDLE DESTINATION ${CMAKE_INSTALL_BINDIR} COMPONENT runtime
)

236
lib/qra/q65/q65code.f90 Normal file
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@ -0,0 +1,236 @@
module gf64math
! add and subtract in GF(2^6) based on primitive polynomial x^6+x+1
implicit none
integer, private :: gf64log(0:63)
integer, private :: gf64antilog(0:62)
! table of the logarithms of the elements of GF(M) (log(0) never used)
data gf64log/ &
-1, 0, 1, 6, 2, 12, 7, 26, 3, 32, &
13, 35, 8, 48, 27, 18, 4, 24, 33, 16, &
14, 52, 36, 54, 9, 45, 49, 38, 28, 41, &
19, 56, 5, 62, 25, 11, 34, 31, 17, 47, &
15, 23, 53, 51, 37, 44, 55, 40, 10, 61, &
46, 30, 50, 22, 39, 43, 29, 60, 42, 21, &
20, 59, 57, 58/
! table of GF(M) elements given their logarithm
data gf64antilog/ &
1, 2, 4, 8, 16, 32, 3, 6, 12, 24, &
48, 35, 5, 10, 20, 40, 19, 38, 15, 30, &
60, 59, 53, 41, 17, 34, 7, 14, 28, 56, &
51, 37, 9, 18, 36, 11, 22, 44, 27, 54, &
47, 29, 58, 55, 45, 25, 50, 39, 13, 26, &
52, 43, 21, 42, 23, 46, 31, 62, 63, 61, &
57, 49, 33/
contains
integer function gf64_add(i1,i2)
implicit none
integer::i1
integer::i2
gf64_add=iand(ieor(i1,i2),63)
end function gf64_add
integer function gf64_mult(i1,i2)
implicit none
integer::i1
integer::i2
integer::j
if(i1.eq.0 .or. i2.eq.0) then
gf64_mult=0
elseif(i1.eq.1) then
gf64_mult=i2
elseif(i2.eq.1) then
gf64_mult=i1
else
j=mod(gf64log(i1)+gf64log(i2),63)
gf64_mult=gf64antilog(j)
endif
end function gf64_mult
end module gf64math
module q65_generator
integer generator(15,50)
data generator/ &
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, &
0,20, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, &
0,20, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, &
0,20, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, &
0,20, 0, 1, 1, 0, 0, 0,10, 0, 0, 0, 0, 1, 0, &
0,20, 0, 1, 1, 0, 0, 0,10, 0, 0, 0,44, 1, 0, &
0,20, 0, 1, 1, 0, 0, 0,10, 1, 0, 0,44, 1, 0, &
0,20, 0, 1, 1, 0, 0, 0,10, 1, 0, 0,44, 1,14, &
0,20, 0, 1, 1, 0, 0, 0,10, 1,31, 0,44, 1,14, &
0,20, 0, 1, 1,33, 0, 0,10, 1,31, 0,44, 1,14, &
56,20, 0, 1, 1,33, 0, 0,10, 1,31, 0,44, 1,14, &
56,20, 0, 1, 1,33, 0, 1,10, 1,31, 0,44, 1,14, &
56, 1, 0, 1, 1,33, 0, 1,10, 1,31, 0,44, 1,14, &
56, 1, 0, 1, 1,33, 0, 1,10, 1,31,36,44, 1,14, &
56, 1, 0, 1, 1,33, 0, 1,43, 1,31,36,44, 1,14, &
56, 1, 0, 1, 1,33, 0, 1,43,17,31,36,44, 1,14, &
56, 1, 0, 1, 1,33, 0, 1,43,17,31,36,36, 1,14, &
56, 1, 0, 1, 1,33,53, 1,43,17,31,36,36, 1,14, &
56, 1, 0,35, 1,33,53, 1,43,17,31,36,36, 1,14, &
56, 1, 0,35, 1,33,53, 1,43,17,30,36,36, 1,14, &
56, 1, 0,35, 1,33,53,52,43,17,30,36,36, 1,14, &
56, 1, 0,35, 1,32,53,52,43,17,30,36,36, 1,14, &
56, 1,60,35, 1,32,53,52,43,17,30,36,36, 1,14, &
56, 1,60,35, 1,32,53,52,43,17,30,36,36,49,14, &
56, 1,60,35, 1,32,53,52,43,17,30,36,37,49,14, &
56, 1,60,35,54,32,53,52,43,17,30,36,37,49,14, &
56, 1,60,35,54,32,53,52, 1,17,30,36,37,49,14, &
1, 1,60,35,54,32,53,52, 1,17,30,36,37,49,14, &
1, 0,60,35,54,32,53,52, 1,17,30,36,37,49,14, &
1, 0,60,35,54,32,53,52, 1,17,30,37,37,49,14, &
1, 0,61,35,54,32,53,52, 1,17,30,37,37,49,14, &
1, 0,61,35,54,32,53,52, 1,48,30,37,37,49,14, &
1, 0,61,35,54,32,53,52, 1,48,30,37,37,49,15, &
1, 0,61,35,54, 0,53,52, 1,48,30,37,37,49,15, &
1, 0,61,35,54, 0,52,52, 1,48,30,37,37,49,15, &
1, 0,61,35,54, 0,52,52, 1,48,30,37,37, 0,15, &
1, 0,61,35,54, 0,52,34, 1,48,30,37,37, 0,15, &
1, 0,61,35,54, 0,52,34, 1,48,30,37, 0, 0,15, &
1, 0,61,35,54, 0,52,34, 1,48,30,20, 0, 0,15, &
1, 0, 0,35,54, 0,52,34, 1,48,30,20, 0, 0,15, &
1, 0, 0,35,54, 0,52,34, 1, 0,30,20, 0, 0,15, &
0, 0, 0,35,54, 0,52,34, 1, 0,30,20, 0, 0,15, &
0, 0, 0,35,54, 0,52,34, 1, 0,38,20, 0, 0,15, &
0, 0, 0,35, 0, 0,52,34, 1, 0,38,20, 0, 0,15, &
0, 0, 0,35, 0, 0,52, 0, 1, 0,38,20, 0, 0,15, &
0, 0, 0,35, 0, 0,52, 0, 1, 0,38,20, 0, 0, 0, &
0, 0, 0,35, 0, 0,52, 0, 0, 0,38,20, 0, 0, 0, &
0, 0, 0,35, 0, 0,52, 0, 0, 0,38, 0, 0, 0, 0, &
0, 0, 0, 0, 0, 0,52, 0, 0, 0,38, 0, 0, 0, 0, &
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,38, 0, 0, 0, 0/
end module q65_generator
subroutine q65_encode(message,codeword)
use gf64math
use q65_generator
integer message(15)
integer codeword(65)
integer i,j
codeword=0
codeword(1:15)=message
do i=1,15
do j=16,65
codeword(j)=gf64_add(codeword(j),gf64_mult(message(i),generator(i,j-15)))
enddo
enddo
return
end
subroutine get_q65crc12(mc2,ncrc1,ncrc2)
!
character c12*12,c6*6
integer*1 mc(90),mc2(90),tmp(6)
integer*1 r(13),p(13)
integer ncrc
! polynomial for 12-bit CRC 0xF01
data p/1,1,0,0,0,0,0,0,0,1,1,1,1/
! flip bit order of each 6-bit symbol for consistency with Nico's calculation
do i=0,14
tmp=mc2(i*6+1:i*6+6)
mc(i*6+1:i*6+6)=tmp(6:1:-1)
enddo
! divide by polynomial
r=mc(1:13)
do i=0,77
r(13)=mc(i+13)
r=mod(r+r(1)*p,2)
r=cshift(r,1)
enddo
write(c6,'(6b1)') r(6:1:-1)
read(c6,'(b6.6)') ncrc1
read(c6,'(6b1)') mc2(79:84)
write(c6,'(6b1)') r(12:7:-1)
read(c6,'(b6.6)') ncrc2
read(c6,'(6b1)') mc2(85:90)
end subroutine get_q65crc12
program q65code
use packjt77
implicit none
character msg*37,msgsent*27,arg*12,c12*12,c6*6
integer message(15)
integer codeword(65), shortcodeword(63)
integer isync(22)
integer itone(85)
integer i,j,k
integer nargs,ncrc1,ncrc2,ncrc
integer i3,n3
integer*1 mbits(90)
integer msymbols(15)
character*77 c77
data isync/1,9,12,13,15,22,23,26,27,33,35,38,46,50,55,60,62,66,69,74,76,85/
nargs=iargc()
if(nargs .ne. 1) then
print*,'Usage: q65sf "msg"'
goto 999
endif
call getarg(1,msg)
i3=-1
n3=-1
call pack77(msg,i3,n3,c77)
mbits=0
read(c77,'(77i1)') mbits(1:77)
! Message is 77 bits long. Add a 0 bit to create a 78-bit message and pad with
! 12 zeros to create 90-bit mbit array for CRC calculation.
call get_q65crc12(mbits,ncrc1,ncrc2)
! Now have message in bits 1:78 and CRC in bits 79:90.
! Group message bits into 15 6-bit symbols:
do i=0,14
write(c6,'(6i1)') mbits( (i*6+1):(i*6+6) )
read(c6,'(b6.6)') message(i+1)
enddo
! Encode to create a 65-symbol codeword
call q65_encode(message,codeword)
write(*,*) 'Generated message plus CRC (90 bits)'
write(*,'(a8,15i4)') '6 bit : ',message
write(*,'(a8,90i1)') 'binary: ',mbits
write(*,*) ' '
write(*,*) 'Codeword with CRC symbols (65 symbols)'
write(*,'(20i3)') codeword
!Shorten the codeword by omitting the CRC symbols (symbols 14 and 15)
shortcodeword(1:13)=codeword(1:13)
shortcodeword(14:63)=codeword(16:65)
!Insert sync symbols to create array of channel symbols
j=1
k=0
do i=1,85
if(i.eq.isync(j)) then
j=j+1
itone(i)=0
else
k=k+1
itone(i)=shortcodeword(k)+1
endif
enddo
write(*,*) ' '
write(*,*) 'Channel symbols (85 total)'
write(*,'(20i3)') itone
999 end program q65code

3
map65/libm65/CMakeLists.txt
View File

@ -37,6 +37,7 @@ set (libm65_FSRCS
ftnquit.f90
q65b.f90
gen65.f90
gen_q65_cwave.f90
gen_q65_wave.f90
geocentric.f90
getdphi.f90
@ -94,7 +95,7 @@ set_source_files_properties (${libm65_ka9q_CSRCS} PROPERTIES COMPILE_FLAGS -Wno-
set (libm65_CSRCS
${libm65_ka9q_CSRCS}
ftrsd2.c
gran.c
# gran.c
igray.c
tmoonsub.c
usleep.c

70
map65/libm65/gen_q65_cwave.f90 Normal file
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@ -0,0 +1,70 @@
subroutine gen_q65_cwave(msg,ntxfreq,ntone_spacing,msgsent,cwave,nwave)
! Encodes a Q65 message to yield complex cwave() at fsample = 96000 Hz
use packjt
parameter (NMAX=60*96000)
character*22 msg
character*22 msgsent !Message as it will be received
character*120 cmnd
character*80 wsjtx_dir
character*16 cjunk
real*8 t,dt,phi,f,f0,dfgen,dphi,twopi,tsym
complex cwave(NMAX)
integer itone(85)
integer icos7(0:6)
data icos7/2,5,6,0,4,1,3/ !Defines a 7x7 Costas array
data twopi/6.283185307179586476d0/
save
open(9,file='wsjtx_dir.txt',status='old')
read(9,'(a)') wsjtx_dir
close(9)
msgsent=msg
! 1 2 3 4 5
! 12345678901234567890123456789012345678901234567890123456789012345
cmnd='q65sim "K1ABC W9XYZ EN37 " A 1500 0 0 0 0 60 0 99 >itone.txt'
cmnd(9:30)=msg
write(cmnd(35:38),'(i4)') ntxfreq
cmnd=trim(wsjtx_dir)//cmnd
call execute_command_line(cmnd)
open(9,file='itone.txt',status='old')
do i=1,99
read(9,1000,end=999) cjunk
1000 format(a16)
if(cjunk.eq.'Channel symbols:') exit
enddo
read(9,1002) itone
1002 format(20i3)
close(9)
! Set up necessary constants
nsym=85
tsym=7200.d0/12000.d0
dt=1.d0/96000.d0
f0=ntxfreq
dfgen=ntone_spacing*12000.d0/7200.d0
phi=0.d0
dphi=twopi*dt*f0
i=0
nwave=85*7200*96000.d0/12000.d0
t=0.d0
j0=0
do i=1,nwave
t=t+dt
j=t/tsym + 1
if(j.gt.85) exit
if(j.ne.j0) then
f=f0 + itone(j)*dfgen
dphi=twopi*dt*f
j0=j
endif
phi=phi+dphi
if(phi.gt.twopi) phi=phi-twopi
xphi=phi
cwave(i)=cmplx(cos(xphi),-sin(xphi))
enddo
999 return
end subroutine gen_q65_cwave

137
map65/libm65/mapsim.f90
View File

@ -2,7 +2,7 @@ program mapsim
! Generate simulated data for testing of MAP65
parameter (NMAX=96000*60)
parameter (NMAX=60*96000)
real*4 d4(4,NMAX) !Floating-point data
integer*2 id4(4,NMAX) !i*2 data, dual polarization
integer*2 id2(2,NMAX) !i*2 data, single polarization
@ -10,35 +10,41 @@ program mapsim
complex z,zx,zy
real*8 fcenter,fsample,samfac,f,dt,twopi,phi,dphi
character msg0*22,message*22,msgsent*22,arg*8,fname*13,mode*2
logical bq65
nargs=iargc()
if(nargs.ne.9) then
print*,'Usage: mapsim DT "message" mode f1 f2 nsigs pol SNR nfiles'
print*,'Example: 2.5 "CQ K1ABC FN42" B -22 33 20 45 -20 1'
if(nargs.ne.10) then
print*,'Usage: mapsim "message" mode DT fa fb nsigs pol fDop SNR nfiles'
print*,'Example: mapsim "CQ K1ABC FN42" B 2.5 -20 20 21 45 0.0 -20 1'
print*,' '
print*,'Enter message = "" to use entries in msgs.txt.'
print*,'Enter pol = -1 to generate a range of polarization angles.'
print*,'Enter SNR = 0 to generate a range of SNRs.'
print*,' mode = A B C for JT65; QA-QE for Q65-60A'
print*,' fa = lowest freq in kHz, relative to center'
print*,' fb = highest freq in kHz, relative to center'
print*,' message = "" to use entries in msgs.txt.'
print*,' pol = -1 to generate a range of polarization angles.'
print*,' SNR = 0 to generate a range of SNRs.'
go to 999
endif
call getarg(1,arg)
read(arg,*) dt0 !Time delay
call getarg(2,msg0)
call getarg(1,msg0)
message=msg0 !Transmitted message
call getarg(3,mode) !JT65 sub-mode (A B C B2 C2)
call getarg(2,mode) !JT65 sub-mode (A B C QA-QE)
call getarg(3,arg)
read(arg,*) dt0 !Time delay
call getarg(4,arg)
read(arg,*) f1 !Lowest freq (kHz, relative to fcenter)
read(arg,*) fa !Lowest freq (kHz, relative to fcenter)
call getarg(5,arg)
read(arg,*) f2 !Highest freq
read(arg,*) fb !Highest freq
call getarg(6,arg)
read(arg,*) nsigs !Number of signals in each file
call getarg(7,arg)
read(arg,*) npol !Polarization in degrees
call getarg(8,arg)
read(arg,*) snrdb !S/N
pol=npol
call getarg(8,arg)
read(arg,*) fdop !Doppler spread
call getarg(9,arg)
read(arg,*) snrdb !S/N
call getarg(10,arg)
read(arg,*) nfiles !Number of files
rmsdb=25.
@ -49,17 +55,20 @@ program mapsim
twopi=8.d0*atan(1.d0)
rad=360.0/twopi
samfac=1.d0
mode65=1
if(mode(1:1).eq.'B') mode65=2
if(mode(1:1).eq.'C') mode65=4
nfast=1
if(mode(2:2).eq.'2') nfast=2
npts=NMAX/nfast
bq65=(mode(1:1).eq.'Q')
ntone_spacing=1
ntxfreq=1270
fac=1.0/32767.0
if(mode(1:1).eq.'B' .or. mode(2:2).eq.'B') ntone_spacing=2
if(mode(1:1).eq.'C' .or. mode(2:2).eq.'C') ntone_spacing=4
if(mode(2:2).eq.'D') ntone_spacing=8
if(mode(2:2).eq.'E') ntone_spacing=16
npts=NMAX
open(12,file='msgs.txt',status='old')
write(*,1000)
1000 format('File N freq S/N pol Message'/ &
'---------------------------------------------------')
1000 format('File N Mode DT freq pol fDop SNR Message'/ &
'--------------------------------------------------------------------')
do ifile=1,nfiles
nmin=ifile-1
@ -72,31 +81,43 @@ program mapsim
call noisegen(d4,npts) !Generate Gaussuian noise
if(msg0.ne.' ') then
call cgen65(message,mode65,nfast,samfac,nsendingsh,msgsent,cwave,nwave)
if(bq65) then
call gen_q65_cwave(message,ntxfreq,ntone_spacing,msgsent, &
cwave,nwave)
else
call cgen65(message,ntone_spacing,samfac,nsendingsh,msgsent, &
cwave,nwave)
endif
endif
rewind 12
if(fdop.gt.0.0) call dopspread(cwave,nwave,fdop)
do isig=1,nsigs
if(msg0.eq.' ') then
read(12,1004) message
1004 format(a22)
call cgen65(message,mode65,nfast,samfac,nsendingsh,msgsent, &
cwave,nwave)
if(bq65) then
call gen_q65_cwave(msg,ntxfreq,mode65,msgsent,cwave,nwave)
else
call cgen65(message,ntone_spacing,samfac,nsendingsh,msgsent, &
cwave,nwave)
endif
endif
if(npol.lt.0) pol=(isig-1)*180.0/nsigs
a=cos(pol/rad)
b=sin(pol/rad)
f=1000.0*(f1+f2)/2.0
if(nsigs.gt.1) f=1000.0*(f1 + (isig-1)*(f2-f1)/(nsigs-1.0))
f=1000.0*(fa+fb)/2.0
if(nsigs.gt.1) f=1000.0*(fa + (isig-1)*(fb-fa)/(nsigs-1.0))
dphi=twopi*f*dt + 0.5*twopi
snrdbx=snrdb
if(snrdb.ge.-1.0) snrdbx=-15.0 - 15.0*(isig-1.0)/nsigs
sig=sqrt(2.2*2500.0/96000.0) * 10.0**(0.05*snrdbx)
write(*,1020) ifile,isig,0.001*f,snrdbx,nint(pol),msgsent
1020 format(i3,i4,f8.3,f7.1,i5,2x,a22)
write(*,1020) ifile,isig,mode,dt0,0.001*f,nint(pol),fDop,snrdbx,msgsent
1020 format(i3,i3,2x,a2,f6.2,f8.3,i5,2f7.1,2x,a22)
phi=0.
! i0=fsample*(3.5d0+0.05d0*(isig-1))
@ -133,3 +154,55 @@ program mapsim
enddo
999 end program mapsim
subroutine dopspread(cwave,nwave,fspread)
parameter (NMAX=60*96000)
parameter (NFFT=NMAX,NH=NFFT/2)
complex cwave(NMAX)
complex cspread(0:NMAX-1)
twopi=8.0*atan(1.0)
df=96000.0/nfft
cspread(0)=1.0
cspread(NH)=0.
b=6.0 !Use truncated Lorenzian shape for fspread
do i=1,NH
f=i*df
x=b*f/fspread
z=0.
a=0.
if(x.lt.3.0) then !Cutoff beyond x=3
a=sqrt(1.111/(1.0+x*x)-0.1) !Lorentzian amplitude
phi1=twopi*rran() !Random phase
z=a*cmplx(cos(phi1),sin(phi1))
endif
cspread(i)=z
z=0.
if(x.lt.3.0) then !Same thing for negative freqs
phi2=twopi*rran()
z=a*cmplx(cos(phi2),sin(phi2))
endif
cspread(nfft-i)=z
enddo
call four2a(cspread,nfft,1,1,1) !Transform to time domain
sum=0.
do i=0,nfft-1
p=real(cspread(i))**2 + aimag(cspread(i))**2
sum=sum+p
enddo
avep=sum/nfft
fac=sqrt(1.0/avep)
cspread=fac*cspread !Normalize to constant avg power
cwave=cspread*cwave !Apply Rayleigh fading
! do i=0,nfft-1
! p=real(cspread(i))**2 + aimag(cspread(i))**2
! write(14,3010) i,p,cspread(i)
!3010 format(i8,3f12.6)
! enddo
return
end subroutine dopspread