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Enhance jt65sim to allow 11025 Hz rate, selectable base frequency and o/p gain offset.
Needs a review. git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@8388 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
This commit is contained in:
Bill Somerville
parent
b76e5248df
commit
d48fb58ffa
@ -5,7 +5,7 @@ program jt65sim
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use wavhdr
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use packjt
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use options
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parameter (NMAX=54*12000) ! = 648,000
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parameter (NMAX=54*12000) ! = 648,000 @12kHz
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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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@ -21,15 +21,18 @@ program jt65sim
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character msg*22,fname*11,csubmode*1,c,optarg*500,numbuf*32
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! character call1*5,call2*5
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logical :: display_help=.false.,seed_prngs=.true.
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type (option) :: long_options(9) = [ &
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type (option) :: long_options(12) = [ &
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option ('help',.false.,'h','Display this help message',''), &
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option ('sub-mode',.true.,'m','sub mode, default MODE=A','MODE'), &
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option ('num-sigs',.true.,'n','number of signals per file, default SIGNALS=10','SIGNALS'), &
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option ('f0',.true.,'F','base frequency offset, default F0=1500.0','F0'), &
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option ('doppler-spread',.true.,'d','Doppler spread, default SPREAD=0.0','SPREAD'), &
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option ('time-offset',.true.,'t','Time delta, default SECONDS=0.0','SECONDS'), &
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option ('num-files',.true.,'f','Number of files to generate, default FILES=1','FILES'), &
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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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option ('11025',.false.,'S','Generate at 11025Hz sample rate, default 12000Hz',''), &
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option ('gain-offset',.true.,'G','Gain offset in dB, default GAIN=0dB','GAIN'), &
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option ('message',.true.,'M','Message text','Message') ]
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integer nprc(126) !Sync pattern
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@ -45,14 +48,17 @@ program jt65sim
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csubmode='A'
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mode65=1
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nsigs=10
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bf0=1500.
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fspread=0.
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xdt=0.
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snrdb=0.
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nfiles=1
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nsample_rate=12000
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gain_offset=0.
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msg="K1ABC W9XYZ EN37"
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do
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call getopt('hm:n:d:t:f:ps:M:',long_options,c,optarg,narglen,nstat,noffset,nremain,.true.)
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call getopt('hm:n:F:d:t:f:ps:SG:M:',long_options,c,optarg,narglen,nstat,noffset,nremain,.true.)
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if( nstat .ne. 0 ) then
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exit
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end if
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@ -66,11 +72,13 @@ program jt65sim
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if(csubmode.eq.'C') mode65=4
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case ('n')
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read (optarg(:narglen), *,err=10) nsigs
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case ('F')
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read (optarg(:narglen), *,err=10) bf0
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case ('d')
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read (optarg(:narglen), *,err=10) fspread
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case ('t')
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read (optarg(:narglen), *) numbuf
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if (numbuf(1:1) == '\') then
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if (numbuf(1:1) == '\') then !'\'
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read (numbuf(2:), *,err=10) xdt
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else
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read (numbuf, *,err=10) xdt
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@ -81,11 +89,20 @@ program jt65sim
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seed_prngs=.false.
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case ('s')
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read (optarg(:narglen), *) numbuf
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if (numbuf(1:1) == '\') then
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if (numbuf(1:1) == '\') then !'\'
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read (numbuf(2:), *,err=10) snrdb
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else
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read (numbuf, *,err=10) snrdb
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end if
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case ('S')
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nsample_rate=11025
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case ('G')
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read (optarg(:narglen), *) numbuf
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if (numbuf(1:1) == '\') then !'\'
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read (numbuf(2:), *, err=10) gain_offset
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else
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read (numbuf, *, err=10) gain_offset
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end if
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case ('M')
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read (optarg(:narglen), '(A)',err=10) msg
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write(*,*) msg
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@ -116,15 +133,16 @@ program jt65sim
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call sgran() ! see C rand generator (used in gran)
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end if
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rms=100.
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fsample=12000.d0 !Sample rate (Hz)
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rms=100. * 10. ** (gain_offset / 20.)
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fsample=nsample_rate !Sample rate (Hz)
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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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npts=54*nsample_rate !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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sps=real(nsample_rate)/baud !Samples per symbol, at fsample=NSAMPLE_RATE Hz
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nsym=126 !Number of channel symbols
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h=default_header(12000,npts)
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h=default_header(nsample_rate,npts)
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dfsig=2000.0/nsigs !Freq spacing between sigs in file (Hz)
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do ifile=1,nfiles !Loop over requested number of files
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@ -141,8 +159,8 @@ program jt65sim
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endif
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do isig=1,nsigs !Generate requested number of sigs
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if(mod(nsigs,2).eq.0) f0=1500.0 + dfsig*(isig-0.5-nsigs/2)
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if(mod(nsigs,2).eq.1) f0=1500.0 + dfsig*(isig-(nsigs+1)/2)
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if(mod(nsigs,2).eq.0) f0=bf0 + dfsig*(isig-0.5-nsigs/2)
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if(mod(nsigs,2).eq.1) f0=bf0 + dfsig*(isig-(nsigs+1)/2)
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xsnr=snrdb
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if(snrdb.eq.0.0) xsnr=-19 - isig
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if(csubmode.eq.'B' .and. snrdb.eq.0.0) xsnr=-21 - isig
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@ -180,7 +198,7 @@ program jt65sim
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phi=0.d0
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dphi=0.d0
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k=12000 + xdt*12000 !Start audio at t = xdt + 1.0 s
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k=nsample_rate + xdt*nsample_rate !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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@ -200,7 +218,7 @@ program jt65sim
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enddo
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if(fspread.ne.0) then !Apply specified Doppler spread
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df=12000.0/nfft
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df=real(nsample_rate)/nfft
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twopi=8*atan(1.0)
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cspread(0)=1.0
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cspread(NH)=0.
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@ -254,7 +272,7 @@ program jt65sim
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avep=sum/NFFT
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fac=sqrt(1.0/avep)
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cspread=fac*cspread !Normalize to constant avg power
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cdat=cspread(1:npts)*cdat !Apply Rayleigh fading
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cdat(1:npts)=cspread(1:npts)*cdat(1:npts) !Apply Rayleigh fading
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! do i=0,NFFT-1
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! p=real(cspread(i))**2 + aimag(cspread(i))**2
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