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Put superfox parameters in sfox_params.f90.

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This commit is contained in:
Joe Taylor 2024-01-31 11:18:42 -05:00
parent 0d664e4ed1
commit 88838fca62
2 changed files with 20 additions and 18 deletions
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12
lib/superfox/sfox_params.f90 Normal file
View File

@ -0,0 +1,12 @@
parameter (KK=49) !Information bits
parameter (ND1=62) !Data symbols before sync waveform
parameter (ND2=63) !Data symbols after sync waveform
parameter (ND=ND1+ND2) !Total data symbols (125)
parameter (NS=23) !Sync symbols (for length)
parameter (NN=NS+ND) !Total channel symbols (148)
parameter (NSPS=1024) !Samples per symbol at 12000 S/s
parameter (NSYNC=NS*NSPS) !Samples in sync waveform (23,552)
parameter (NZ=NSPS*NN) !Samples in full Tx waveform (151,552)
parameter (NMAX=15*12000) !Samples in iwave (180,000)
parameter (NFFT=32768) !Length of FFT for sync waveform
parameter (NFFT1=2*NSPS) !Length of FFTs for symbol spectra

26
lib/superfox/synctest.f90
View File

@ -3,8 +3,7 @@ program synctest
! Generate and test sync waveforms for possible use in SuperFox signal.
use wavhdr
parameter (NMAX=15*12000) !Total samples in .wav file
parameter (NFFT=32768)
include "sfox_params.f90"
parameter (MMAX=150,JMAX=300)
type(hdr) h !Header for .wav file
integer*2 iwave(NMAX) !Generated i*2 waveform
@ -37,28 +36,19 @@ program synctest
call getarg(4,arg)
read(arg,*) snrdb
ntrperiod=15
rms=100.
fsample=12000.0 !Sample rate (Hz)
npts=fsample*ntrperiod !Total samples in .wav file
twopi=8.0*atan(1.0)
nsps=1024
ns1=62
nsync=23
ns2=63
tsync=nsync*nsps/fsample
nsym=125 !Number of channel symbols
nsync=tsync*fsample
tsync=NS*nsps/fsample
baud=12000.0/nsps !Keying rate, 11.719 baud for nsps=1024
h=default_header(12000,npts)
h=default_header(12000,NMAX)
fname='000000_000001.wav'
open(10,file=trim(fname),access='stream',status='unknown')
xnoise=0.
cnoise=0.
if(snrdb.lt.90) then
do i=1,npts !Generate Gaussian noise
do i=1,NMAX !Generate Gaussian noise
x=gran()
y=gran()
xnoise(i)=x
@ -96,9 +86,9 @@ program synctest
dat=aimag(cdat(1:NMAX)) + xnoise !Add generated AWGN noise
fac=32767.0
if(snrdb.ge.90.0) iwave(1:npts)=nint(fac*dat(1:npts))
if(snrdb.lt.90.0) iwave(1:npts)=nint(rms*dat(1:npts))
write(10) h,iwave(1:npts) !Save the .wav file
if(snrdb.ge.90.0) iwave(1:NMAX)=nint(fac*dat(1:NMAX))
if(snrdb.lt.90.0) iwave(1:NMAX)=nint(rms*dat(1:NMAX))
write(10) h,iwave(1:NMAX) !Save the .wav file
close(10)
crcvd=0.