mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2025-11-04 05:50:31 -05:00
Now can see signal on both waterfall plots. (Far from correct, though!)
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@2608 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
This commit is contained in:
Joe Taylor
parent
661b072330
commit
d9df62b9e9
@ -1,14 +1,14 @@
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#ifndef COMMONS_H
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#define COMMONS_H
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#define NFFT 32768
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#define NSMAX 15750
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extern "C" {
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extern struct {
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short int d2[1800*12000]; //This is "common/jt8com/..." in fortran
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float ss[184*4400];
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float savg[4400];
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float ss[184*NSMAX];
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float savg[NSMAX];
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double fcenter; //USB dial freq (kHz)
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int nutc; //UTC as integer, HHMM
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int ntrperiod; //TR period (seconds)
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40
jt9.txt
40
jt9.txt
@ -5,15 +5,15 @@ rate r=1/2, and a zero tail, which leads to an encoded message length
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of (72+31)*2 = 206 bits. Modulation is 9-FSK: 8 tones for data, one
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for synchronization. Sixteen symbol intervals are used for
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synchronization, so a transmission requires a total of 207/3 + 16 = 85
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channel symbols. Symbol durations tsym are set to approximately
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channel symbols. Symbol durations tsym are approximately
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(TRperiod-10)/85, where TRperiod is the T/R sequence length in
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seconds. The exact symbol lengths are chosen so as to make nsps, the
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number of samples at 12000 samples per second, a number rich in
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factors less than 7. This choice makes for efficient FFTs. Tone
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spacing of the 9-FSK modulation is df=1/tsym, the same as the keying
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rate. The total occupied bandwidth is 9*df.
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seconds. Exact symbol lengths are chosen so that nsps, the number of
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samples per symbol (at 12000 samples per second) is a number with no
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prime factor greater than 7. This choice makes for efficient FFTs.
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Tone spacing of the 9-FSK modulation is df=1/tsym=12000/nsps, the same
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as the keying rate. The total occupied bandwidth is 9*df.
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Parameters of the five JT9 sub-modes are summarized in the following
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Parameters of five JT9 sub-modes are summarized in the following
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table, along with S/N thresholds measured by simulation on an AWGN
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(additive white Gaussian noise) channel.
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@ -33,7 +33,7 @@ JT9-30 250880 15750 0.048 20.91 0.4 -42.3 1788.5 11.5 2^5 3^2 5^3 7
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Transmitting
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------------
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1. Source encode the structured message to 72 bits
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2. Convolutionally encode (K=32, r=1/2) to (72+31)*2 = 206 bits
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2. Apply convolutional ECC (K=32, r=1/2) to yield (72+31)*2 = 206 bits
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3. Interleave to scramble the bit order
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4. Assemble 3-bit groups to make (206+1)/3 = 69 symbols
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5. Gray-code the symbol values
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@ -43,21 +43,21 @@ Transmitting
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Receiving
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---------
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1. Apply noise blanking with the timf2 method
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2. Filter to 500 Hz bandwidth, downsample (1/16) to 750 Hz complex
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(FIR filter with 61 taps). Complex data to array c0 (max 1.35M)
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2. Filter to 500 Hz bandwidth and downsample (1/16) to 750 Hz (FIR
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filter with 61 taps). Complex data to array c0 (max 1.35M)
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3. Compute symbol-length spectra at half-symbol steps. Use for
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waterfalls s(15750) and detecting sync vectors; save in ss(184,15750)
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and savg(15750)
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4. At time Tdec, look for sync vectors in ss(); get estimates of DF, DT
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5. Do full-length FFTs, NFFT1=96*nsps2
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waterfall display s(15750) and save in ss(184,15750) and
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savg(15750) for detecting sync vectors.
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4. At time Tdec, find sync vectors in ss(); get estimates of DF, DT
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5. Do full-length FFT, NFFT1=96*nsps2, zero-pad as required.
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6. For each candidate signal, do inverse FFT of length 1536. This
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will provide 16 complex samples per symbol, and sync tone should be
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close to f=0.
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yields 16 complex samples per symbol, and sync tone should be
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close to zero frequency.
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7. Use afc65b method to get improved values of DF, DT.
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8. Tweak freq and time offset to 0.
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9. Compute 8-bin spectra of 69 data symbols: s2(8,69). Re-order the
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bins by removing Gray code.
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10. Compute soft symbols for 206 bits
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11. Re-order the bits by removing interleaving.
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9. Compute 8-bin spectra of 69 data symbols: s2(8,69). Re-order bins
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by removing Gray code.
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10. Compute soft symbols for 206 bits.
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11. Remove interleaving
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12. Pack bits into bytes, send to Fano decoder
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13. If Fano succeeds, remove source encoding and display user message.
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@ -7,8 +7,6 @@ subroutine genjt9(message,minutes,msgsent,d6)
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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*4 mettab(0:255,0:1)
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integer*4 d0(13) !72-bit message as 6-bit words
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integer*1 d1(13) !72 bits and zero tail as 8-bit bytes
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integer*1 d2(207) !Encoded information-carrying bits
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@ -17,18 +15,6 @@ subroutine genjt9(message,minutes,msgsent,d6)
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integer*4 d5(69) !Gray-coded symbols, values 0-7
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integer*4 d6(85) !Channel symbols including sync, values 0-8
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integer*4 t0(13) !72-bit message as 6-bit words
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integer*1 t1(13) !72 bits and zero tail as 8-bit bytes
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integer*1 t2(207) !Encoded information-carrying bits
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integer*1 t3(207) !Bits from t4, after interleaving
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integer*4 t4(69) !Symbols from t5, values 0-7
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integer*4 t5(69) !Gray-coded symbols, values 0-7
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integer*4 t6(85) !Channel symbols including sync, values 0-8
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integer*1 tmp(72)
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integer*1 i1
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equivalence (i1,i4)
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integer isync(85) !Sync vector
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data isync/ &
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1,0,0,0,0,1,0,0,0,0,1,0,0,0,0,1,0,0,0,0, &
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@ -58,60 +44,5 @@ subroutine genjt9(message,minutes,msgsent,d6)
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endif
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enddo
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! We're done! Now reverse the process, as a test.
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t6=d6
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j=0
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do i=1,85
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if(isync(i).eq.1) cycle
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j=j+1
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t5(j)=t6(i)-1
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enddo
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call graycode(t5,69,-1,t4)
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call unpackbits(t4,69,3,t3)
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call interleave9(t3,-1,t2)
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! Get the metric table
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bias=0.37
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scale=10 !Optimize?
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open(19,file='met8.21',status='old')
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do i=0,255
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read(19,*) x00,x0,x1
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mettab(i,0)=nint(scale*(x0-bias))
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mettab(i,1)=nint(scale*(x1-bias)) !### Check range, etc. ###
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enddo
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close(19)
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nbits=72
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ndelta=17
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limit=1000
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do i=1,206
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i4=-10
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if(t2(i).eq.1) i4=10
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i4=i4+128
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t2(i)=i1
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enddo
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call fano232(t2,nbits+31,mettab,ndelta,limit,t1,ncycles,metric,ierr, &
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maxmetric,maxnp)
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nbytes=(nbits+7)/8
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do i=1,nbytes
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n=t1(i)
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t4(i)=iand(n,255)
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enddo
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call unpackbits(t4,nbytes,8,tmp)
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call packbits(tmp,12,6,t4)
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do i=1,12
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if(t4(i).lt.128) t1(i)=t4(i)
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if(t4(i).ge.128) t1(i)=t4(i)-256
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enddo
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do i=1,12
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t4(i)=t1(i)
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enddo
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print*,'z0',d0(1:12)-t4(1:12)
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return
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end subroutine genjt9
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@ -6,8 +6,27 @@ program jt9sim
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integer ihdr(11)
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integer*2 iwave !Generated waveform (no noise)
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real*8 f0,f,dt,twopi,phi,dphi,baud,fspan
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character msg0*22,message*22,msgsent*22,arg*8,fname*11
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character msg*22,msg0*22,message*22,msgsent*22,arg*8,fname*11
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integer*4 d6(85)
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integer*4 mettab(0:255,0:1)
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integer*4 t0(13) !72-bit message as 6-bit words
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integer*1 t1(13) !72 bits and zero tail as 8-bit bytes
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integer*1 t2(207) !Encoded information-carrying bits
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integer*1 t3(207) !Bits from t4, after interleaving
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integer*4 t4(69) !Symbols from t5, values 0-7
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integer*4 t5(69) !Gray-coded symbols, values 0-7
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integer*4 t6(85) !Channel symbols including sync, values 0-8
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integer*1 tmp(72)
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integer*1 i1
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equivalence (i1,i4)
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integer isync(85) !Sync vector
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data isync/ &
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1,0,0,0,0,1,0,0,0,0,1,0,0,0,0,1,0,0,0,0, &
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1,0,0,0,0,1,0,0,0,0,1,0,0,0,0,0,0,0,1,0, &
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0,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,1,0,0,0, &
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0,0,1,0,0,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0, &
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1,0,0,0,1/
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common/acom/dat(NMAX),iwave(NMAX)
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nargs=iargc()
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@ -51,6 +70,18 @@ program jt9sim
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open(12,file='msgs.txt',status='old')
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! Get the metric table
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bias=0.37
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scale=10 !Optimize?
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open(19,file='met8.21',status='old')
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do i=0,255
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read(19,*) x00,x0,x1
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mettab(i,0)=nint(scale*(x0-bias))
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mettab(i,1)=nint(scale*(x1-bias)) !### Check range, etc. ###
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enddo
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close(19)
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write(*,1000)
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1000 format('File N freq S/N Message'/ &
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'---------------------------------------------------')
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@ -113,6 +144,49 @@ program jt9sim
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write(10) ihdr,iwave(1:npts)
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close(10)
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! We're done! Now decode the data in d6, as a test.
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j=0
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do i=1,85
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if(isync(i).eq.1) cycle
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j=j+1
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t5(j)=d6(i)-1
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enddo
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call graycode(t5,69,-1,t4)
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call unpackbits(t4,69,3,t3)
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call interleave9(t3,-1,t2)
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nbits=72
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ndelta=17
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limit=1000
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do i=1,206
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i4=-10
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if(t2(i).eq.1) i4=10
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i4=i4+128
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t2(i)=i1
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enddo
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call fano232(t2,nbits+31,mettab,ndelta,limit,t1,ncycles,metric,ierr, &
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maxmetric,maxnp)
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nbytes=(nbits+7)/8
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do i=1,nbytes
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n=t1(i)
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t4(i)=iand(n,255)
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enddo
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call unpackbits(t4,nbytes,8,tmp)
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call packbits(tmp,12,6,t4)
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do i=1,12
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if(t4(i).lt.128) t1(i)=t4(i)
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if(t4(i).ge.128) t1(i)=t4(i)-256
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enddo
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do i=1,12
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t4(i)=t1(i)
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enddo
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call unpackmsg(t4,msg) !Unpack decoded msg
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if(msg.ne.msg0) print*,'Decode error: ',msg0,' ',msg
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enddo
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999 end program jt9sim
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@ -12,7 +12,7 @@ subroutine symspecx(k,nsps,ndiskdat,nb,nbslider,pxdb,s,nkhz,ihsym, &
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! nzap number of samples zero'ed by noise blanker
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parameter (NMAX=1800*12000) !Total sample intervals per 30 minutes
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parameter (NSMAX=4400) !Max length of saved spectra
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parameter (NSMAX=15750) !Max length of saved spectra
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parameter (MAXFFT=262144) !Max length of FFTs
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integer*2 id2
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real*8 ts,hsym
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@ -1307,7 +1307,7 @@ void MainWindow::on_actionJT8_1_triggered()
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{
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m_mode="JT8-1";
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m_TRperiod=60;
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m_nsps=7168;
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m_nsps=6912;
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soundInThread.setPeriod(m_TRperiod,m_nsps);
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soundOutThread.setPeriod(m_TRperiod,m_nsps);
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g_pWideGraph->setPeriod(m_TRperiod,m_nsps);
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@ -1320,7 +1320,7 @@ void MainWindow::on_actionJT8_2_triggered()
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{
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m_mode="JT8-2";
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m_TRperiod=120;
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m_nsps=16000;
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m_nsps=15360;
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soundInThread.setPeriod(m_TRperiod,m_nsps);
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soundOutThread.setPeriod(m_TRperiod,m_nsps);
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g_pWideGraph->setPeriod(m_TRperiod,m_nsps);
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@ -1333,7 +1333,7 @@ void MainWindow::on_actionJT8_5_triggered()
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{
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m_mode="JT8-5";
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m_TRperiod=300;
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m_nsps=42336;
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m_nsps=40960;
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soundInThread.setPeriod(m_TRperiod,m_nsps);
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soundOutThread.setPeriod(m_TRperiod,m_nsps);
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g_pWideGraph->setPeriod(m_TRperiod,m_nsps);
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@ -1346,7 +1346,7 @@ void MainWindow::on_actionJT8_10_triggered()
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{
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m_mode="JT8-10";
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m_TRperiod=600;
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m_nsps=86400;
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m_nsps=82944;
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soundInThread.setPeriod(m_TRperiod,m_nsps);
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soundOutThread.setPeriod(m_TRperiod,m_nsps);
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g_pWideGraph->setPeriod(m_TRperiod,m_nsps);
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@ -1359,7 +1359,7 @@ void MainWindow::on_actionJT8_30_triggered()
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{
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m_mode="JT8-30";
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m_TRperiod=1800;
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m_nsps=262144;
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m_nsps=250880;
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soundInThread.setPeriod(m_TRperiod,m_nsps);
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soundOutThread.setPeriod(m_TRperiod,m_nsps);
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g_pWideGraph->setPeriod(m_TRperiod,m_nsps);
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30
plotter.cpp
30
plotter.cpp
@ -32,7 +32,7 @@ CPlotter::CPlotter(QWidget *parent) : //CPlotter Constructor
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m_fQSO = 125;
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m_line = 0;
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m_fSample = 12000;
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m_nsps=7168;
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m_nsps=6912;
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m_paintAllZoom = false;
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}
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@ -62,7 +62,7 @@ void CPlotter::resizeEvent(QResizeEvent* ) //resizeEvent()
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m_WaterfallPixmap.fill(Qt::black);
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m_ZoomWaterfallPixmap.fill(Qt::black);
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m_2DPixmap.fill(Qt::black);
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memset(m_zwf,0,32768*h);
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memset(m_zwf,0,NSMAX*h);
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m_ScalePixmap = QPixmap(w,30);
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m_ZoomScalePixmap = QPixmap(w,30); //(no change on resize...)
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m_ScalePixmap.fill(Qt::white);
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@ -97,9 +97,11 @@ void CPlotter::paintEvent(QPaintEvent *) // paintEvent()
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QRect source(0,0,w,30);
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painter.drawPixmap(target,m_ZoomScalePixmap,source);
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float df=m_fSample/32768.0;
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int x0=16384 + (0.001*(m_ZoomStartFreq+m_fCal)+m_fQSO-m_nkhz+1.27046) * \
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1000.0/df + 0.5;
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// float df=m_fSample/32768.0;
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// int x0=16384 + (0.001*(m_ZoomStartFreq+m_fCal)+m_fQSO-m_nkhz+1.27046) * \
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// 1000.0/df + 0.5;
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float df=12000.0/m_nsps;
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int x0=0; //### TEMP ###
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QPainter painter2(&m_ZoomWaterfallPixmap);
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for(int i=0; i<w; i++) { //Paint the top row
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@ -136,7 +138,7 @@ void CPlotter::paintEvent(QPaintEvent *) // paintEvent()
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m_paintEventBusy=false;
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}
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void CPlotter::draw(float s[], int i0, float splot[]) //draw()
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void CPlotter::draw(float swide[], int i0, float splot[]) //draw()
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{
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int i,j,w,h;
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float y;
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@ -169,15 +171,15 @@ void CPlotter::draw(float s[], int i0, float splot[]) //draw()
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for(i=0; i<w; i++) {
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strong=false;
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if(s[i]<0) {
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if(swide[i]<0) {
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strong=true;
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s[i]=-s[i];
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swide[i]=-swide[i];
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}
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y = 10.0*log10(s[i]);
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y = 10.0*log10(swide[i]);
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int y1 = 5.0*gain*(y + 29 -m_plotZero);
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if (y1<0) y1=0;
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if (y1>254) y1=254;
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if (s[i]>1.e29) y1=255;
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if (swide[i]>1.e29) y1=255;
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m_hist1[y1]++;
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painter1.setPen(m_ColorTbl[y1]);
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painter1.drawPoint(i,0);
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@ -185,7 +187,7 @@ void CPlotter::draw(float s[], int i0, float splot[]) //draw()
|
||||
int y2 = gain*(y + 34 -m_plotZero);
|
||||
if (y2<0) y2=0;
|
||||
if (y2>254) y2=254;
|
||||
if (s[i]>1.e29) y2=255;
|
||||
if (swide[i]>1.e29) y2=255;
|
||||
if(strong != strong0 or i==w-1) {
|
||||
painter2D.drawPolyline(LineBuf,j);
|
||||
j=0;
|
||||
@ -199,9 +201,9 @@ void CPlotter::draw(float s[], int i0, float splot[]) //draw()
|
||||
}
|
||||
}
|
||||
|
||||
for(i=0; i<32768; i++) {
|
||||
for(i=0; i<NSMAX; i++) {
|
||||
y = 10.0*log10(splot[i]);
|
||||
int y1 = 5.0*gain*(y + 30 - m_plotZero);
|
||||
int y1 = 5.0*gain*(y + 29 -m_plotZero);
|
||||
if (y1<0) y1=0;
|
||||
if (y1>254) y1=254;
|
||||
if (splot[i]>1.e29) y1=255;
|
||||
@ -209,7 +211,7 @@ void CPlotter::draw(float s[], int i0, float splot[]) //draw()
|
||||
m_zwf[i]=y1;
|
||||
}
|
||||
|
||||
if(s[0]>1.0e29) m_line=0;
|
||||
if(swide[0]>1.0e29) m_line=0;
|
||||
m_line++;
|
||||
if(m_line == 13) {
|
||||
UTCstr();
|
||||
|
||||
@ -2,13 +2,14 @@
|
||||
#include <stdexcept>
|
||||
|
||||
#define FRAMES_PER_BUFFER 1024
|
||||
#define NSMAX 15750
|
||||
|
||||
extern "C" {
|
||||
#include <portaudio.h>
|
||||
extern struct {
|
||||
short int d2[1800*12000]; //This is "common/jt8com/..." in fortran
|
||||
float ss[184*4400];
|
||||
float savg[4400];
|
||||
float ss[184*NSMAX];
|
||||
float savg[NSMAX];
|
||||
double fcenter; //USB dial freq (kHz)
|
||||
int nutc; //UTC as integer, HHMM
|
||||
int ntrperiod; //TR period (seconds)
|
||||
|
||||
@ -1,7 +1,7 @@
|
||||
#include "widegraph.h"
|
||||
#include "ui_widegraph.h"
|
||||
|
||||
#define NSMAX 4400
|
||||
#define NSMAX 15750
|
||||
|
||||
WideGraph::WideGraph(QWidget *parent) :
|
||||
QDialog(parent),
|
||||
@ -89,6 +89,7 @@ void WideGraph::dataSink2(float s[], int nkhz, int ihsym, int ndiskdata,
|
||||
}
|
||||
|
||||
//Average spectra over specified number, m_waterfallAvg
|
||||
// qDebug() << "A" << ihsym << NSMAX << df << nbpp;
|
||||
if (n==0) {
|
||||
for (int i=0; i<NSMAX; i++)
|
||||
splot[i]=s[i];
|
||||
@ -108,20 +109,30 @@ void WideGraph::dataSink2(float s[], int nkhz, int ihsym, int ndiskdata,
|
||||
// if(sf != ui->widePlot->startFreq()) ui->widePlot->SetStartFreq(sf);
|
||||
// int i0=16384.0+(ui->widePlot->startFreq()-nkhz+1.27046+0.001*m_fCal) *
|
||||
// 1000.0/df + 0.5;
|
||||
|
||||
int i0=0; //###
|
||||
nbpp=1; //###
|
||||
|
||||
int i=i0;
|
||||
for (int j=0; j<2048; j++) {
|
||||
smax=0;
|
||||
for (int k=0; k<nbpp; k++) {
|
||||
i++;
|
||||
if(splot[i]>smax) smax=splot[i];
|
||||
i++;
|
||||
}
|
||||
swide[j]=smax;
|
||||
/*
|
||||
float sum=0;
|
||||
for (int k=0; k<nbpp; k++) {
|
||||
i++;
|
||||
sum += splot[i];
|
||||
}
|
||||
swide[j]=sum;
|
||||
*/
|
||||
if(lstrong[1 + i/32]!=0) swide[j]=-smax; //Tag strong signals
|
||||
}
|
||||
|
||||
// qDebug() << "B" << ihsym << smax << s[100];
|
||||
// qDebug() << "B" << ihsym << swide[1000] << splot[1000];
|
||||
// Time according to this computer
|
||||
qint64 ms = QDateTime::currentMSecsSinceEpoch() % 86400000;
|
||||
int ntr = (ms/1000) % m_TRperiod;
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user