mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-11-21 19:55:20 -05:00
8794bad146
By using the local 8-bit character set we can allow local non-ASCII characters in file paths, for example user account names on MS Windows with characters in the default code page.
106 lines
2.7 KiB
Fortran
106 lines
2.7 KiB
Fortran
subroutine hspec(id2,k,nutc0,ntrpdepth,nrxfreq,ntol,bmsk144, &
|
|
btrain,pcoeffs,ingain,mycall,hiscall,bshmsg,bswl,datadir,green,s, &
|
|
jh,pxmax,dbNoGain,line1)
|
|
|
|
! Input:
|
|
! k pointer to the most recent new data
|
|
! nutc0 UTC for display of decode(s)
|
|
! ntrpdepth TR period and 1000*ndepth
|
|
! nrxfreq Rx audio center frequency
|
|
! ntol Decoding range is +/- ntol
|
|
! ncontest Contest type (0=NONE 1=NA_VHF 2=EU_VHF 3=FIELD_DAY 4=RTTY 5=WW_DIGI)
|
|
! bmsk144 Boolean, true if in MSK144 mode
|
|
! btrain Boolean, turns on training in MSK144 mode
|
|
! ingain Relative gain for spectra
|
|
|
|
! Output:
|
|
! green() power
|
|
! s() spectrum for horizontal spectrogram
|
|
! jh index of most recent data in green(), s()
|
|
|
|
parameter (JZ=703)
|
|
character*80 line1
|
|
character*(*) datadir
|
|
character*12 mycall,hiscall
|
|
integer*2 id2(0:120*12000-1)
|
|
logical*1 bmsk144,bshmsg,btrain,bswl
|
|
real green(0:JZ-1)
|
|
real s(0:63,0:JZ-1)
|
|
real x(512)
|
|
real*8 pcoeffs(5)
|
|
complex cx(0:256)
|
|
data rms/999.0/,k0/99999999/
|
|
equivalence (x,cx)
|
|
save ja,rms0
|
|
|
|
ndepth=ntrpdepth/1000
|
|
ntrperiod=ntrpdepth - 1000*ndepth
|
|
gain=10.0**(0.1*ingain)
|
|
nfft=512
|
|
nstep=nfft
|
|
nblks=7
|
|
if(ntrperiod.lt.30) then
|
|
nstep=256
|
|
nblks=14
|
|
endif
|
|
|
|
if(k.gt.30*12000) go to 900
|
|
if(k.lt.nfft) then
|
|
jh=0
|
|
go to 900 !Wait for enough samples to start
|
|
endif
|
|
|
|
if(k.lt.k0) then !Start a new data block
|
|
ja=-nstep
|
|
jh=-1
|
|
rms0=0.0
|
|
endif
|
|
|
|
pxmax = 0;
|
|
do iblk=1,nblks
|
|
if(jh.lt.JZ-1) jh=jh+1
|
|
ja=ja+nstep
|
|
jb=ja+nfft-1
|
|
x=id2(ja:jb)
|
|
sq=dot_product(x,x)
|
|
xmax = maxval(x);
|
|
xmin = abs(minval(x));
|
|
if (xmin > xmax) xmax = xmin;
|
|
if (xmax.gt.0.0) pxmax=20.0*log10(xmax);
|
|
rms=sqrt(gain*sq/nfft)
|
|
rms2=sqrt(sq/nfft);
|
|
green(jh)=0.
|
|
if(rms.gt.0.0) then
|
|
green(jh)=20.0*log10(rms)
|
|
dbNoGain=20.0*log10(rms2);
|
|
endif
|
|
call four2a(x,nfft,1,-1,0) !Real-to-complex FFT
|
|
df=12000.0/nfft
|
|
fac=(1.0/nfft)**2
|
|
do i=1,64
|
|
j=2*i
|
|
sx=real(cx(j))**2 + aimag(cx(j))**2 + real(cx(j-1))**2 + &
|
|
aimag(cx(j-1))**2
|
|
s(i-1,jh)=fac*gain*sx
|
|
enddo
|
|
if(ja+2*nfft.gt.k) exit
|
|
enddo
|
|
k0=k
|
|
|
|
if(bmsk144) then
|
|
if(k.ge.7168) then
|
|
tsec=(k-7168)/12000.0
|
|
k0=k-7168
|
|
tt1=sum(float(abs(id2(k0:k0+3583))))
|
|
k0=k-3584
|
|
tt2=sum(float(abs(id2(k0:k0+3583))))
|
|
if(tt1.ne.0.0 .and. tt2.ne.0) then
|
|
call mskrtd(id2(k-7168+1:k),nutc0,tsec,ntol,nrxfreq,ndepth, &
|
|
mycall,hiscall,bshmsg,btrain,pcoeffs,bswl,datadir,line1)
|
|
endif
|
|
endif
|
|
endif
|
|
|
|
900 return
|
|
end subroutine hspec
|