mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-11-18 01:52:05 -05:00
333abab6d7
2. Removed the "itry" loop in wsjt65, speeding up JT65 decodes. 3. A dded Deep Search to avemsg65. 4. Changed "Decoding" menu accordingly. Karn RS decoder used only if KV decoder not present. 5. Removed sort from deep65; find 1st and 2nd largest values directly. 6. Fixed Makefile.win. (Still need to fix *nix Makefile.) git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/trunk@212 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
45 lines
1.3 KiB
Fortran
45 lines
1.3 KiB
Fortran
subroutine fil652(c1,n1,c2,n2)
|
|
|
|
C FIR lowpass filter designed using ScopeFIR
|
|
|
|
C fsample = 2756.25 Hz
|
|
C Ntaps = 31
|
|
C fc = 500 Hz
|
|
C fstop = 689.0625 Hz
|
|
C Ripple = 0.5 dB
|
|
C Stop Atten = 50 dB
|
|
C fout = 1378.125 Hz
|
|
|
|
parameter (NTAPS=31)
|
|
parameter (NH=NTAPS/2)
|
|
parameter (NDOWN=2) !Downsample ratio
|
|
complex c1(n1)
|
|
complex c2(*)
|
|
|
|
C Filter coefficients:
|
|
real a(-NH:NH)
|
|
data a/
|
|
+ -0.000859869246,-0.008518289484,-0.011250152625,-0.001061705256,
|
|
+ 0.013958392156, 0.010047338728,-0.015003870003,-0.025027880982,
|
|
+ 0.007151700557, 0.043634723913, 0.016788108012,-0.061886192062,
|
|
+ -0.073548459520, 0.075261027466, 0.306638863577, 0.419826269508,
|
|
+ 0.306638863577, 0.075261027466,-0.073548459520,-0.061886192062,
|
|
+ 0.016788108012, 0.043634723913, 0.007151700557,-0.025027880982,
|
|
+ -0.015003870003, 0.010047338728, 0.013958392156,-0.001061705256,
|
|
+ -0.011250152625,-0.008518289484,-0.000859869246/
|
|
|
|
n2=(n1-NTAPS+NDOWN)/NDOWN
|
|
k0=NH-NDOWN+1
|
|
|
|
C Loop over all output samples
|
|
do i=1,n2
|
|
c2(i)=0.
|
|
k=k0 + NDOWN*i
|
|
do j=-NH,NH
|
|
c2(i)=c2(i) + c1(j+k)*a(j)
|
|
enddo
|
|
enddo
|
|
|
|
return
|
|
end
|