diff --git a/applications/apertif/designs/apertif_unb1_correlator/src/matlab/FIR_LPF_ApertifCF.m b/applications/apertif/designs/apertif_unb1_correlator/src/matlab/FIR_LPF_ApertifCF.m
new file mode 100644
index 0000000000000000000000000000000000000000..6c8e1d00df483aa5a1f7304c987fb4b74098d84d
--- /dev/null
+++ b/applications/apertif/designs/apertif_unb1_correlator/src/matlab/FIR_LPF_ApertifCF.m
@@ -0,0 +1,112 @@
+% filename FIR_LPF_ApertifCF.m
+% author R. de Wild
+% project APERTIF_CF
+% history 150129-150218,150319,150430,150512,150521,
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+% workspace initiation
+clear all
+close all
+
+% preset FIR-filter parameters
+M = 512 ; % # filter-coefficients (taps)
+n = M -1 ; % # delay-elements
+h_ix = 1 : 1 : M ; % coefficient-index
+nbit = 15 ; % # bits/coefficient = 1 sign +('nbit'-1) mantissa
+fs = 781250.0 ; % sampling clock = 800.0 MHz / 1024
+f_nyq = fs/2 ; % Nyquist frequency
+f_pb = 12000.0 ; % end of passband
+
+% normalized frequency axis & normalized amplitude axis
+w_pb = f_pb/f_nyq ;
+r_sb = 10^(-3.0) ; % stopband ripple = -60.0 dB_W
+r_pb = 10^(-0.025) ; % passband ripple = -0.5 dB_W
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+% compute M (= n+1) real-valued filter-coefficients
+h = fircls1(n, w_pb, r_pb,r_sb) ;
+% compute amplitude characteristic of h
+hfs_abs = abs (fftshift(fft( h ,M))) ;
+
+% compute M (= n+1) integer-valued filter-coefficients
+hmax = max(h) ;
+hq = double ( uencode(h,nbit,hmax,'signed') ) ;
+% compute amplitude characteristic of hq
+hqfs_abs = abs (fftshift (fft( hq )/M)) ;
+
+% compute M (= n+1) 2's complement filter-coefficients
+hq_str = dec2bin ( mod((hq),2^nbit) , nbit )
+hq_bin = ( str2num(hq_str) )' ;
+
+%whos
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+% display FIR-filter parameters on screen:
+sprintf ( [ ' f_pb = end of passband = %10.6e Hz \r' , ...
+ ' fs/2 = nyquist rate = %10.6e Hz \n' , ...
+ ' M = number of coefficients = %d \n' , ...
+ ' nbit = number of bits/coefficient = %d ' ], ...
+ f_pb , f_nyq , M , nbit )
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+% write FIR-filter coefficients to file (formats=real/integer/hexadecimal):
+% N.B. - read '.txt'-file with 'wordpad' !!!
+
+file_name = ['FIR_LPF_ApertifCF.txt'] ;
+FIRtable = [ h_ix ; h(h_ix) ; hq(h_ix) ; hq_bin(h_ix) ] ;
+fid = fopen ( file_name , 'w' ) ;
+fprintf ( fid ,'%d \t %14.10f \t %14.10f \t %X \n' , FIRtable ) ;
+fclose ( fid ) ;
+
+file_name = ['FIR_LPF_ApertifCF2.txt'] ;
+FIRtable = [ hq(h_ix)] ;
+fid = fopen ( file_name , 'w' ) ;
+fprintf ( fid ,'%d \n' , FIRtable ) ;
+fclose ( fid ) ;
+
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+% plot frequency response of h on screen: log-amplitude characteristic
+figure (1) ;
+h_ixH = (M/2)+1 : 1 : M ;
+plot ( h_ixH , 20.0 * log10 ( hfs_abs(h_ixH) ) ) ;
+ xlim ( [ (M/2)+1 M ] ) ;
+ grid on ;
+ zoom on ;
+title( [ 'FIR filter: (log-)amplitude-spectrum --> ' , ...
+ 'number of coefficients = ', num2str(M), ' ; ' , ...
+ 'real-valued coefficients ; ' , ...
+ 'sampling rate = ', num2str(fs), ' [Hz] ; ' , ...
+ 'end of passband = ', num2str(f_pb), ' [Hz] ; ' ] ) ;
+
+% plot frequency response of hq on screen: log-amplitude characteristic
+figure (2) ;
+h_ixH = (M/2)+1 : 1 : M ;
+plot ( h_ixH , 20.0 * log10 ( hqfs_abs(h_ixH) ) ) ;
+ xlim ( [ (M/2)+1 M ] ) ;
+ grid on ;
+ zoom on ;
+title( [ 'FIR filter: (log-)amplitude-spectrum --> ' , ...
+ 'number of coefficients = ', num2str(M), ' ; ' , ...
+ 'number of bits/coefficient = ', num2str(nbit), ' ; ' , ...
+ 'sampling rate = ', num2str(fs), ' [Hz] ; ' , ...
+ 'end of passband = ', num2str(f_pb), ' [Hz] ; ' ] ) ;
+
+figure (3) ;
+h_ixH = 1 : 1 : M ;
+plot ( h_ixH , hq ) ;
+ xlim ( [ 1 M ] ) ;
+ grid on ;
+ zoom on ;
+title( [ 'FIR filter: Filtercoefficients --> ' , ...
+ 'number of coefficients = ', num2str(M), ' ; ' , ...
+ 'number of bits/coefficient = ', num2str(nbit), ' ; ' , ...
+ 'sampling rate = ', num2str(fs), ' [Hz] ; ' , ...
+ 'end of passband = ', num2str(f_pb), ' [Hz] ; ' ] ) ;
+
+
diff --git a/applications/apertif/designs/apertif_unb1_correlator/src/matlab/FIR_LPF_ApertifCF.txt b/applications/apertif/designs/apertif_unb1_correlator/src/matlab/FIR_LPF_ApertifCF.txt
new file mode 100644
index 0000000000000000000000000000000000000000..37726fe67450a1dc586014dbdac6ab0b54d6d396
--- /dev/null
+++ b/applications/apertif/designs/apertif_unb1_correlator/src/matlab/FIR_LPF_ApertifCF.txt
@@ -0,0 +1,512 @@
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diff --git a/applications/apertif/designs/apertif_unb1_correlator/src/matlab/FIR_LPF_ApertifCF2.txt b/applications/apertif/designs/apertif_unb1_correlator/src/matlab/FIR_LPF_ApertifCF2.txt
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--- /dev/null
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diff --git a/applications/apertif/designs/apertif_unb1_correlator/src/matlab/FIR_LPF_ApertifCF_9bit.txt b/applications/apertif/designs/apertif_unb1_correlator/src/matlab/FIR_LPF_ApertifCF_9bit.txt
new file mode 100644
index 0000000000000000000000000000000000000000..841d1193020b89899fb35fe3567e2fdc2ef11648
--- /dev/null
+++ b/applications/apertif/designs/apertif_unb1_correlator/src/matlab/FIR_LPF_ApertifCF_9bit.txt
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