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updated ui added new features
This commit is contained in:
zach
Vendored
+611
@@ -0,0 +1,611 @@
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% tfsk.m
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% Brady O'Brien 8 January 2016
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% David Rowe May 2020
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%
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% Automatic testing of C port of FSK modem by comparing to reference
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% Octave version. Currently just a subset of tests enabled in order to
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% run in a reasonable amount of time as ctests, but still trapping any
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% bit-rot.
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#{
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FSK Modem automated test instructions:
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1. Use cmake to build in debug mode to ensure unittest/tfsk is built:
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$ cd ~/codec2
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$ rm -Rf build_linux && mkdir build_linux
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$ cd build_linux
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$ cmake -DCMAKE_BUILD_TYPE=Debug ..
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$ make
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2 - Change tfsk_location below if required
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3 - Ensure Octave packages are installed
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4 - Start Octave and run tfsk.m. It will perform all tests automatically
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#}
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% tfsk executable path/file
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if getenv("PATH_TO_TFSK")
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global tfsk_location = getenv("PATH_TO_TFSK")
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printf("setting tfsk_location from env var: %s\n", getenv("PATH_TO_TFSK"));
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else
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global tfsk_location = '../build_linux/unittest/tfsk';
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end
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% Set to 1 for verbose printouts
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global print_verbose = 0;
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global mod_pass_fail_maxdiff = 1e-3/5000;
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fsk_horus_as_a_lib=1;
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fsk_horus;
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pkg load signal;
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% not needed unless parallel tests running
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%pkg load parallel;
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graphics_toolkit('gnuplot');
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function print_result(test_name, result)
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printf("%s", test_name);
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for i=1:(40-length(test_name))
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printf(".");
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end
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printf(": %s\n", result);
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end
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function mod = fsk_mod_c(Fs,Rs,f1,fsp,bits,M)
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global tfsk_location;
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%command to be run by system to launch the modulator
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command = sprintf('%s M %d %d %d %d %d 0 fsk_mod_ut_bitvec fsk_mod_ut_modvec fsk_mod_ut_log.txt',tfsk_location,M,f1,fsp,Fs,Rs);
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%save input bits into a file
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bitvecfile = fopen('fsk_mod_ut_bitvec','wb+');
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fwrite(bitvecfile,bits,'uint8');
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fclose(bitvecfile);
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%run the modulator
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system(command);
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modvecfile = fopen('fsk_mod_ut_modvec','rb');
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mod = fread(modvecfile,'single');
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fclose(modvecfile);
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endfunction
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%Compare 2 vectors, fail if they are not close enough
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function pass = vcompare(vc,voct,vname,tname,tol,pnum)
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global print_verbose;
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%Get delta of vectors
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dvec = abs(abs(vc - voct));
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%Normalize difference
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dvec = dvec ./ abs(max(abs(voct))+1e-8);
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maxdvec = abs(max(dvec));
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pass = maxdvec<tol;
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if print_verbose == 1
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printf(' Comparing vectors %s in test %s. Diff is %f\n',vname,tname,maxdvec);
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end
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if pass == 0
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printf('\n*** vcompare failed %s in test %s. Diff: %f Tol: %f\n\n',vname,tname,maxdvec,tol);
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titlestr = sprintf('Diff between C and Octave of %s for %s',vname,tname)
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figure(10+pnum*2)
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plot(abs(dvec))
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title(titlestr)
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figure(11+pnum*2)
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plot((1:length(vc)),abs(vc),(1:length(voct)),abs(voct))
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end
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endfunction
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% Run C, then Octave version of demod, and compare results
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function test_stats = fsk_demod_xt(Fs,Rs,f1,fsp,mod,tname,M=2,lock_nin=0)
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global print_verbose;
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global tfsk_location;
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%Name of executable containing the modulator
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fsk_demod_ex_file = '../build/unittest/tfsk';
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modvecfilename = sprintf('fsk_demod_ut_modvec_%d',getpid());
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bitvecfilename = sprintf('fsk_demod_ut_bitvec_%d',getpid());
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tvecfilename = sprintf('fsk_demod_ut_tracevec_%d.txt',getpid());
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%command to be run by system to launch the demod
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command = sprintf('%s D %d %d %d %d %d %d %s %s %s',tfsk_location,M,f1,fsp,Fs,Rs,lock_nin,modvecfilename,bitvecfilename,tvecfilename);
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%save modulated input into a file
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modvecfile = fopen(modvecfilename,'wb+');
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fwrite(modvecfile,mod,'single');
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fclose(modvecfile);
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%run the modulator
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system(command);
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bitvecfile = fopen(bitvecfilename,'rb');
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bits = fread(bitvecfile,'uint8');
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fclose(bitvecfile);
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bits = bits!=0;
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%Load test vec dump
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load(tvecfilename)
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%Clean up files
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delete(bitvecfilename);
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delete(modvecfilename);
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delete(tvecfilename);
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o_f1_dc = [];
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o_f2_dc = [];
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o_f3_dc = [];
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o_f4_dc = [];
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o_f1_int = [];
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o_f2_int = [];
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o_f3_int = [];
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o_f4_int = [];
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o_f1 = [];
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o_f2 = [];
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o_f3 = [];
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o_f4 = [];
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o_EbNodB = [];
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o_ppm = [];
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o_Sf = [];
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o_fest = []; o_mask = []; o_fest2 = [];
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o_rx_timing = [];
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o_norm_rx_timing = [];
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o_nin = [];
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%Run octave demod, dump some test vectors
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states = fsk_horus_init(Fs,Rs,M);
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Ts = states.Ts;
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P = states.P;
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states.ftx(1) = f1;
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states.ftx(2) = f1+fsp;
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states.ftx(3) = f1+fsp*2;
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states.ftx(4) = f1+fsp*3;
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states.tx_tone_separation = fsp;
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states.dF = 0;
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modin = mod;
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obits = [];
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while length(modin)>=states.nin
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ninold = states.nin;
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states = est_freq(states, modin(1:states.nin), states.M);
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[bitbuf,states] = fsk_demod(states, modin(1:states.nin));
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if lock_nin states.nin = states.N; end
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modin=modin(ninold+1:length(modin));
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obits = [obits bitbuf];
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%Save other parameters
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o_f1_dc = [o_f1_dc states.f_dc(1,:)];
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o_f2_dc = [o_f2_dc states.f_dc(2,:)];
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o_f1_int = [o_f1_int states.f_int(1,:)];
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o_f2_int = [o_f2_int states.f_int(2,:)];
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o_EbNodB = [o_EbNodB states.EbNodB];
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o_ppm = [o_ppm states.ppm];
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o_rx_timing = [o_rx_timing states.rx_timing];
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o_norm_rx_timing = [o_norm_rx_timing states.norm_rx_timing];
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o_Sf = [o_Sf states.Sf'];
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o_f1 = [o_f1 states.f(1)];
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o_f2 = [o_f1 states.f(2)];
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o_fest = [o_fest states.f];
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o_mask = [o_mask states.mask];
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o_fest2 = [o_fest2 states.f2];
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o_nin = [o_nin states.nin];
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if M==4
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o_f3_dc = [o_f3_dc states.f_dc(3,:)];
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o_f4_dc = [o_f4_dc states.f_dc(4,:)];
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o_f3_int = [o_f3_int states.f_int(3,:)];
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o_f4_int = [o_f4_int states.f_int(4,:)];
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o_f3 = [o_f1 states.f(3)];
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o_f4 = [o_f1 states.f(4)];
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end
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end
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assert(vcompare(o_Sf, t_Sf,'fft est',tname,.001,1));
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assert(vcompare(o_fest, t_f_est,'f est',tname,.001,2));
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assert(vcompare(o_mask, t_mask,'f2 mask',tname,.001,3));
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assert(vcompare(o_fest2, t_f2_est,'f2 est',tname,.001,16));
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o_fest2(1:12)
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t_f2_est(1:12)
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assert(vcompare(o_f1_dc, t_f1_dc, 'f1 dc', tname,.01,8));
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assert(vcompare(o_f2_dc, t_f2_dc, 'f2 dc', tname,.01,9));
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assert(vcompare(o_f2_int, t_f2_int, 'f2 int', tname,.01,10));
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assert(vcompare(o_f1_int, t_f1_int, 'f1 int', tname,.01,11));
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if M==4
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assert(vcompare(o_f3_dc, t_f3_dc, 'f3 dc', tname,.01,4))
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assert(vcompare(o_f4_dc, t_f4_dc, 'f4 dc', tname,.01,5));
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assert(vcompare(o_f3_int, t_f3_int, 'f3 int', tname,.01,6));
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assert(vcompare(o_f4_int, t_f4_int, 'f4 int', tname,.01,7));
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end
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assert(vcompare(o_rx_timing, t_rx_timing,'rx timing',tname,.02,3));
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% Much larger tolerances on unimportant statistics
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assert(vcompare(o_ppm , t_ppm, 'ppm', tname,.02,12));
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assert(vcompare(o_EbNodB, t_EbNodB,'EbNodB', tname,.02,13));
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assert(vcompare(o_nin, t_nin, 'nin', tname,.0001,14));
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assert(vcompare(o_norm_rx_timing, t_norm_rx_timing,'norm rx timing',tname,.02,15));
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diffpass = sum(xor(obits,bits'))<4;
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diffbits = sum(xor(obits,bits'));
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if diffpass==0
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printf('\n***bitcompare test failed test %s diff %d\n\n',tname,sum(xor(obits,bits')))
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figure(15)
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plot(xor(obits,bits'))
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title(sprintf('Bitcompare failure test %s',tname))
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end
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assert(diffpass);
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test_stats.pass = 1;
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test_stats.diff = sum(xor(obits,bits'));
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test_stats.cbits = bits';
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test_stats.obits = obits;
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endfunction
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function [dmod,cmod,omod,pass] = fsk_mod_test(Fs,Rs,f1,fsp,bits,tname,M=2)
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global mod_pass_fail_maxdiff;
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%Run the C modulator
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cmod = fsk_mod_c(Fs,Rs,f1,fsp,bits,M);
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%Set up and run the octave modulator
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states.M = M;
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states = fsk_horus_init(Fs,Rs,M);
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states.ftx(1) = f1;
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states.ftx(2) = f1+fsp;
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if states.M == 4
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states.ftx(3) = f1+fsp*2;
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states.ftx(4) = f1+fsp*3;
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end
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states.dF = 0;
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omod = fsk_mod(states,bits);
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dmod = cmod-omod;
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pass = max(dmod)<(mod_pass_fail_maxdiff*length(dmod));
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if !pass
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printf('Mod failed test %s!\n',tname);
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end
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endfunction
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% Random bit modulator test
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% Pass random bits through the modulators and compare
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function pass = test_mod_horuscfg_randbits
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rand('state',1);
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randn('state',1);
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bits = rand(1,10000)>.5;
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[dmod,cmod,omod,pass] = fsk_mod_test(8000,100,1200,1600,bits,"mod horuscfg randbits");
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if(!pass)
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figure(1)
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plot(dmod)
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title("Difference between octave and C mod impl");
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end
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print_result("test_mod_horuscfg_randbits", "OK");
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endfunction
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% Random bit modulator test
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% Pass random bits through the modulators and compare
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function pass = test_mod_horuscfgm4_randbits
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rand('state',1);
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randn('state',1);
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bits = rand(1,10000)>.5;
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[dmod,cmod,omod,pass] = fsk_mod_test(8000,100,1200,1600,bits,"mod horuscfg randbits",4);
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if(!pass)
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figure(1)
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plot(dmod)
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title("Difference between octave and C mod impl");
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end
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print_result("test_mod_horuscfgm4_randbits", "OK");
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endfunction
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% A big ol' channel impairment tester shamelessly taken from fsk_horus
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% This throws some channel imparment or another at the C and octave
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% modem so they may be compared.
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function stats = tfsk_run_sim(test_frame_mode,EbNodB,timing_offset,fading,df,M=2,frames=50,lock_nin=0)
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#{
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timing_offset [0|1] enable a 1000ppm sample clock offset
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fading [0|1] modulates tx power at 2Hz with 20dB fade depth,
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e.g. to simulate balloon rotating at end of mission
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df tx tone freq drift in Hz/s
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lock_nin [0|1] locks nin to a constant which makes tests much simpler by breaking feedback loop
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#}
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global print_verbose;
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more off
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rand('state',1);
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randn('state',1);
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% ----------------------------------------------------------------------
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% sm2000 config ------------------------
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%states = fsk_horus_init(96000, 1200);
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%states.f1_tx = 4000;
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%states.f2_tx = 5200;
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if test_frame_mode == 2
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% horus rtty config ---------------------
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states = fsk_horus_init(8000, 100, M);
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states.f1_tx = 1200;
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states.f2_tx = 1600;
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end
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if test_frame_mode == 4
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% horus rtty config ---------------------
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states = fsk_horus_init(8000, 100, M);
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states.f1_tx = 1200;
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states.f2_tx = 1600;
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states.tx_bits_file = "horus_tx_bits_rtty.txt"; % Octave file of bits we FSK modulate
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end
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if test_frame_mode == 5
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% horus binary config ---------------------
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states = fsk_horus_init(8000, 100, M);
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states.f1_tx = 1200;
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states.f2_tx = 1600;
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%%%states.tx_bits_file = "horus_tx_bits_binary.txt"; % Octave file of bits we FSK modulate
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states.tx_bits_file = "horus_payload_rtty.txt";
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end
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% ----------------------------------------------------------------------
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states.verbose = 0;
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N = states.N;
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P = states.P;
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Rs = states.Rs;
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nsym = states.nsym;
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Fs = states.Fs;
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states.df = df;
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states.M = M;
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EbNo = 10^(EbNodB/10);
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variance = states.Fs/(states.Rs*EbNo*states.bitspersymbol);
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% set up tx signal with payload bits based on test mode
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if test_frame_mode == 1
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% test frame of bits, which we repeat for convenience when BER testing
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test_frame = round(rand(1, states.nsym));
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tx_bits = [];
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for i=1:frames+1
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tx_bits = [tx_bits test_frame];
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end
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end
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if test_frame_mode == 2
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% random bits, just to make sure sync algs work on random data
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tx_bits = round(rand(1, states.nbit*(frames+1)));
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end
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if test_frame_mode == 3
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% ...10101... sequence
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tx_bits = zeros(1, states.nsym*(frames+1));
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tx_bits(1:2:length(tx_bits)) = 1;
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end
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if (test_frame_mode == 4) || (test_frame_mode == 5)
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% load up a horus msg from disk and modulate that
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test_frame = load(states.tx_bits_file);
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ltf = length(test_frame);
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ntest_frames = ceil((frames+1)*nsym/ltf);
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tx_bits = [];
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for i=1:ntest_frames
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tx_bits = [tx_bits test_frame];
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end
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end
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f1 = states.f1_tx;
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fsp = states.f2_tx-f1;
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states.ftx(1) = f1;
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states.ftx(2) = f1+fsp;
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if states.M == 4
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states.ftx(3) = f1+fsp*2;
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states.ftx(4) = f1+fsp*3;
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end
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tx = fsk_mod(states, tx_bits);
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if timing_offset
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tx = resample(tx, 1000, 1001); % simulated 1000ppm sample clock offset
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end
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if fading
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ltx = length(tx);
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tx = tx .* (1.1 + cos(2*pi*2*(0:ltx-1)/Fs))'; % min amplitude 0.1, -20dB fade, max 3dB
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end
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noise = sqrt(variance)*randn(length(tx),1);
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rx = tx + noise;
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test_name = sprintf("tfsk run sim EbNodB:%d frames:%d timing_offset:%d fading:%d df:%d",EbNodB,frames,timing_offset,fading,df);
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tstats = fsk_demod_xt(Fs,Rs,states.f1_tx,fsp,rx,test_name,M,lock_nin);
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pass = tstats.pass;
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obits = tstats.obits;
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cbits = tstats.cbits;
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% Figure out BER of octave and C modems
|
||||
bitcnt = length(tx_bits);
|
||||
rx_bits = obits;
|
||||
ber = 1;
|
||||
ox = 1;
|
||||
for offset = (1:100)
|
||||
nerr = sum(xor(rx_bits(offset:length(rx_bits)),tx_bits(1:length(rx_bits)+1-offset)));
|
||||
bern = nerr/(bitcnt-offset);
|
||||
if(bern < ber)
|
||||
ox = offset;
|
||||
best_nerr = nerr;
|
||||
end
|
||||
ber = min([ber bern]);
|
||||
end
|
||||
offset = ox;
|
||||
bero = ber;
|
||||
ber = 1;
|
||||
rx_bits = cbits;
|
||||
ox = 1;
|
||||
for offset = (1:100)
|
||||
nerr = sum(xor(rx_bits(offset:length(rx_bits)),tx_bits(1:length(rx_bits)+1-offset)));
|
||||
bern = nerr/(bitcnt-offset);
|
||||
if(bern < ber)
|
||||
ox = offset;
|
||||
best_nerr = nerr;
|
||||
end
|
||||
ber = min([ber bern]);
|
||||
end
|
||||
offset = ox;
|
||||
berc = ber;
|
||||
stats.berc = berc;
|
||||
stats.bero = bero;
|
||||
stats.name = test_name;
|
||||
% coherent BER theory calculation
|
||||
|
||||
stats.thrcoh = .5*(M-1)*erfc(sqrt( (log2(M)/2) * EbNo ));
|
||||
|
||||
% non-coherent BER theory calculation
|
||||
% It was complicated, so I broke it up
|
||||
|
||||
ms = M;
|
||||
ns = (1:ms-1);
|
||||
as = (-1).^(ns+1);
|
||||
bs = (as./(ns+1));
|
||||
|
||||
cs = ((ms-1)./ns);
|
||||
|
||||
ds = ns.*log2(ms);
|
||||
es = ns+1;
|
||||
fs = exp( -(ds./es)*EbNo );
|
||||
|
||||
thrncoh = ((ms/2)/(ms-1)) * sum(bs.*((ms-1)./ns).*exp( -(ds./es)*EbNo ));
|
||||
|
||||
stats.thrncoh = thrncoh;
|
||||
stats.pass = pass;
|
||||
endfunction
|
||||
|
||||
% run a bunch of tests at a range of EbNo's in parallel
|
||||
function pass = ebno_battery_test(timing_offset,fading,df,M)
|
||||
%Range of EbNodB over which to test
|
||||
ebnodbrange = (5:2:13);
|
||||
ebnodbs = length(ebnodbrange);
|
||||
|
||||
mode = 2;
|
||||
%Replication of other parameters for parcellfun
|
||||
modev = repmat(mode,1,ebnodbs);
|
||||
timingv = repmat(timing_offset,1,ebnodbs);
|
||||
fadingv = repmat(fading,1,ebnodbs);
|
||||
dfv = repmat(df,1,ebnodbs);
|
||||
mv = repmat(M,1,ebnodbs);
|
||||
|
||||
statv = pararrayfun(floor(1.25*nproc()),@tfsk_run_sim,modev,ebnodbrange,timingv,fadingv,dfv,mv);
|
||||
passv = zeros(1,length(statv));
|
||||
for ii=(1:length(statv))
|
||||
passv(ii)=statv(ii).pass;
|
||||
if statv(ii).pass
|
||||
printf("Test %s passed\n",statv(ii).name);
|
||||
else
|
||||
printf("Test %s failed\n",statv(ii).name);
|
||||
end
|
||||
end
|
||||
|
||||
%All pass flags are '1'
|
||||
pass = sum(passv)>=length(passv);
|
||||
%and no tests died
|
||||
pass = pass && length(passv)==ebnodbs;
|
||||
passv;
|
||||
assert(pass)
|
||||
endfunction
|
||||
|
||||
%Test with and without sample clock offset
|
||||
function pass = test_timing_var(df,M)
|
||||
pass = ebno_battery_test(1,0,df,M)
|
||||
assert(pass)
|
||||
pass = pass && ebno_battery_test(0,0,df,M)
|
||||
assert(pass)
|
||||
endfunction
|
||||
|
||||
%Test with and without 1 Hz/S freq drift
|
||||
function pass = test_drift_var(M)
|
||||
pass = test_timing_var(1,1,M)
|
||||
pass = pass && test_timing_var(0,1,M)
|
||||
assert(pass)
|
||||
endfunction
|
||||
|
||||
function pass = test_fsk_battery()
|
||||
pass = test_mod_horuscfg_randbits;
|
||||
pass = pass && test_mod_horuscfgm4_randbits;
|
||||
pass = pass && test_drift_var(4);
|
||||
assert(pass)
|
||||
pass = pass && test_drift_var(2);
|
||||
assert(pass)
|
||||
if pass
|
||||
printf("***** All tests passed! *****\n");
|
||||
end
|
||||
endfunction
|
||||
|
||||
function plot_fsk_bers(M=2)
|
||||
%Range of EbNodB over which to plot
|
||||
ebnodbrange = (4:13);
|
||||
|
||||
berc = ones(1,length(ebnodbrange));
|
||||
bero = ones(1,length(ebnodbrange));
|
||||
berinc = ones(1,length(ebnodbrange));
|
||||
beric = ones(1,length(ebnodbrange));
|
||||
ebnodbs = length(ebnodbrange)
|
||||
mode = 2;
|
||||
%Replication of other parameters for parcellfun
|
||||
modev = repmat(mode,1,ebnodbs);
|
||||
timingv = repmat(1,1,ebnodbs);
|
||||
fadingv = repmat(0,1,ebnodbs);
|
||||
dfv = repmat(1,1,ebnodbs);
|
||||
Mv = repmat(M,1,ebnodbs);
|
||||
|
||||
statv = pararrayfun(floor(nproc()),@tfsk_run_sim,modev,ebnodbrange,timingv,fadingv,dfv,Mv);
|
||||
%statv = arrayfun(@tfsk_run_sim,modev,ebnodbrange,timingv,fadingv,dfv,Mv);
|
||||
|
||||
for ii = (1:length(statv))
|
||||
stat = statv(ii);
|
||||
berc(ii)=stat.berc;
|
||||
bero(ii)=stat.bero;
|
||||
berinc(ii)=stat.thrncoh;
|
||||
beric(ii) = stat.thrcoh;
|
||||
end
|
||||
clf;
|
||||
figure(M)
|
||||
|
||||
semilogy(ebnodbrange, berinc,sprintf('r;%dFSK non-coherent theory;',M))
|
||||
hold on;
|
||||
semilogy(ebnodbrange, beric ,sprintf('g;%dFSK coherent theory;',M))
|
||||
semilogy(ebnodbrange, bero ,sprintf('b;Octave fsk horus %dFSK Demod;',M))
|
||||
semilogy(ebnodbrange, berc,sprintf('+;C fsk horus %dFSK Demod;',M))
|
||||
hold off;
|
||||
grid("minor");
|
||||
axis([min(ebnodbrange) max(ebnodbrange) 1E-5 1])
|
||||
legend("boxoff");
|
||||
xlabel("Eb/No (dB)");
|
||||
ylabel("Bit Error Rate (BER)")
|
||||
|
||||
endfunction
|
||||
|
||||
% We kick off tests here ------------------------------------------------------
|
||||
|
||||
pass = 0; ntests = 0;
|
||||
pass += test_mod_horuscfg_randbits; ntests++;
|
||||
pass += test_mod_horuscfgm4_randbits; ntests++;
|
||||
stats = tfsk_run_sim(test_frame_mode=2,EbNodB=5,timing_offset=0,fading=0,df=1,M=4,frames=10,lock_nin=1); ntests++;
|
||||
if stats.pass
|
||||
print_result("Demod 10 frames nin locked", "OK");
|
||||
pass += stats.pass;
|
||||
end
|
||||
stats = tfsk_run_sim(test_frame_mode=2,EbNodB=5,timing_offset=1,fading=0,df=1,M=4,frames=10,lock_nin=0); ntests++;
|
||||
if stats.pass
|
||||
print_result("Demod 10 frames", "OK");
|
||||
pass += stats.pass;
|
||||
end
|
||||
printf("tests: %d passed: %d ", ntests, pass);
|
||||
if ntests == pass printf("PASS\n"); else printf("FAIL\n"); end
|
||||
Reference in New Issue
Block a user