coherent modem C and Octave code giving the same results with AWGN noise at rate Rs.

git-svn-id: https://svn.code.sf.net/p/freetel/code@2078 01035d8c-6547-0410-b346-abe4f91aad63

diff --git a/codec2-dev/octave/cohpsk.m b/codec2-dev/octave/cohpsk.m
index 9b06292bff4178451af26cc4123f835d90298372..f553ec67e89fd20d9c278c30191c57c77ac58797 100644 (file)
--- a/codec2-dev/octave/cohpsk.m
+++ b/codec2-dev/octave/cohpsk.m
@@ -618,7 +618,7 @@ function sim_out = ber_test(sim_in)
 
             s_ch = s_ch + noise;
             
-            [rx_symb rx_bits rx_symb_linear amp_linear amp_ phi_ EsNo_ prev_sym_rx sim_in] = symbol_rate_rx(sim_in, s_ch, prev_sym_rx);                                 
+            [rx_symb rx_bits rx_symb_linear amp_linear amp_ phi_ EsNo_ prev_sym_rx sim_in] = qpsk_symbols_to_bits(sim_in, s_ch, prev_sym_rx);                                 
 
             phi_log = [phi_log; phi_];
             amp_log = [amp_log; amp_];
@@ -662,8 +662,8 @@ function sim_out = ber_test(sim_in)
             if verbose 
               av_tx_pwr = (s_ch_tx_log * s_ch_tx_log')/length(s_ch_tx_log);
 
-              printf("EsNo est (dB): %3.1f Terrs: %d BER %4.2f QPSK BER theory %4.2f av_tx_pwr: %3.2f",
-                       mean(10*log10(EsNo__log)), Terrs,
+              printf("EsNo est (dB): %3.1f Terrs: %d Tbits: %d BER %4.2f QPSK BER theory %4.2f av_tx_pwr: %3.2f",
+                       mean(10*log10(EsNo__log)), Terrs, Tbits,
                        Terrs/Tbits, 0.5*erfc(sqrt(EsNo/2)), av_tx_pwr);
               if ldpc_code
                   printf("\n LDPC: Terrs: %d BER: %4.2f Ferrs: %d FER: %4.2f", 
@@ -738,6 +738,7 @@ function sim_out = ber_test(sim_in)
           hold off;
         end
         ylabel('Phase (rads)');
+        legend('boxoff');
 
         subplot(212)
         plot(phi_x, amp_log(:,2),'r+;Estimated HF channel amp;')
@@ -748,6 +749,7 @@ function sim_out = ber_test(sim_in)
         end
         ylabel('Amplitude');
         xlabel('Time (symbols)');
+        legend('boxoff');
 
         figure(4)
         clf

diff --git a/codec2-dev/octave/tcohpsk.m b/codec2-dev/octave/tcohpsk.m
index d1e1f15ef5bfbc34728e79454dcec07eed915e28..9e9e9d45e6cd78a19ad383a21e556fb2a848b757 100644 (file)
--- a/codec2-dev/octave/tcohpsk.m
+++ b/codec2-dev/octave/tcohpsk.m
@@ -5,6 +5,13 @@
 % script loads the output of unittest/tcohpsk.c and compares it to the
 % output of the reference versions of the same functions written in
 % Octave.
+%
+% Ideas:
+% [ ] EB/No v BER curves changing Np, freq offset etc
+%     + can do these pretty fast in C, if we jave the channel models
+%     [ ] better interpolation between two signals
+%     [ ] feedback to correct out freq offset est
+%     [ ] fading channel
 
 rand('state',1); 
 randn('state',1);
@@ -14,16 +21,20 @@ cohpsk;
 autotest;
 
 n = 2000;
-rames = 35;
+frames = 35;
 framesize = 160;
 foff = 1;
 
+EsNodB = 8;
+EsNo = 10^(EsNodB/10);
+variance = 1/EsNo;
+
 load ../build_linux/unittest/tcohpsk_out.txt
 
 sim_in = standard_init();
-sim_in.framesize = 160;
-sim_in.ldpc_code = 0;
-sim_in.ldpc_code_rate = 1;
+sim_in.framesize        = 160;
+sim_in.ldpc_code        = 0;
+sim_in.ldpc_code_rate   = 1;
 sim_in.Nc               = 4;
 sim_in.Rs               = 50;
 sim_in.Ns               = 4;
@@ -41,14 +52,19 @@ tx_bits_log = [];
 tx_symb_log = [];
 rx_amp_log = [];
 rx_phi_log = [];
+ch_symb_log = [];
 rx_symb_log = [];
 rx_bits_log = [];
+noise_log = [];
+nerr_log = [];
 
 phase = 1;
 freq = exp(j*2*pi*foff/sim_in.Rs);
 
 ch_symb = zeros(sim_in.Nsymbrowpilot, sim_in.Nc);
 
+Nerrs = Tbits = 0;
+
 for i=1:frames
   tx_bits = tx_bits_coh(ptx_bits_coh:ptx_bits_coh+framesize-1);
   ptx_bits_coh += framesize;
@@ -61,29 +77,82 @@ for i=1:frames
   [tx_symb tx_bits prev_tx_sym] = bits_to_qpsk_symbols(sim_in, tx_bits, [], []);
   tx_symb_log = [tx_symb_log; tx_symb];
 
+  noise = sqrt(variance*0.5)*(randn(sim_in.Nsymbrowpilot,sim_in.Nc) + j*randn(sim_in.Nsymbrowpilot,sim_in.Nc));
+  noise_log = [noise_log; noise];
+
   for r=1:sim_in.Nsymbrowpilot
     phase = phase*freq;
-    ch_symb(r,:) = tx_symb(r,:)*phase;  
+    ch_symb(r,:) = tx_symb(r,:)*phase + noise(r,:);  
   end
   phase = phase/abs(phase);
+  ch_symb_log = [ch_symb_log; ch_symb];
 
   [rx_symb rx_bits rx_symb_linear amp_linear amp_ phi_ EsNo_ prev_sym_rx sim_in] = qpsk_symbols_to_bits(sim_in, ch_symb, []);
   rx_symb_log = [rx_symb_log; rx_symb];
   rx_amp_log = [rx_amp_log; amp_];
   rx_phi_log = [rx_phi_log; phi_];
-  rx_bits_log = [rx_bits_log; rx_bits];
+  rx_bits_log = [rx_bits_log rx_bits];
+
+  % BER stats
+
+  if i > 2
+    error_positions = xor(prev_tx_bits, rx_bits);
+    Nerrs  += sum(error_positions);
+    nerr_log = [nerr_log sum(error_positions)];
+    Tbits += length(error_positions);
+  end
+  prev_tx_bits = tx_bits;
 end
 
 stem_sig_and_error(1, 111, tx_bits_log_c(1:n), tx_bits_log(1:n) - tx_bits_log_c(1:n), 'tx bits', [1 n -1.5 1.5])
 stem_sig_and_error(2, 211, real(tx_symb_log_c(1:n)), real(tx_symb_log(1:n) - tx_symb_log_c(1:n)), 'tx symb re', [1 n -1.5 1.5])
 stem_sig_and_error(2, 212, imag(tx_symb_log_c(1:n)), imag(tx_symb_log(1:n) - tx_symb_log_c(1:n)), 'tx symb im', [1 n -1.5 1.5])
-stem_sig_and_error(3, 211, rx_amp_log_c(1:n), rx_amp_log(1:n) - rx_amp_log_c(1:n), 'Amp Est', [1 n -1.5 1.5])
-stem_sig_and_error(3, 212, rx_phi_log_c(1:n), rx_phi_log(1:n) - rx_phi_log_c(1:n), 'Phase Est', [1 n -4 4])
-stem_sig_and_error(4, 211, real(rx_symb_log_c(1:n)), real(rx_symb_log(1:n) - rx_symb_log_c(1:n)), 'rx symb re', [1 n -1.5 1.5])
-stem_sig_and_error(4, 212, imag(rx_symb_log_c(1:n)), imag(rx_symb_log(1:n) - rx_symb_log_c(1:n)), 'rx symb im', [1 n -1.5 1.5])
+stem_sig_and_error(3, 211, real(ch_symb_log_c(1:n)), real(ch_symb_log(1:n) - ch_symb_log_c(1:n)), 'ch symb re', [1 n -1.5 1.5])
+stem_sig_and_error(3, 212, imag(ch_symb_log_c(1:n)), imag(ch_symb_log(1:n) - ch_symb_log_c(1:n)), 'ch symb im', [1 n -1.5 1.5])
+stem_sig_and_error(4, 211, rx_amp_log_c(1:n), rx_amp_log(1:n) - rx_amp_log_c(1:n), 'Amp Est', [1 n -1.5 1.5])
+stem_sig_and_error(4, 212, rx_phi_log_c(1:n), rx_phi_log(1:n) - rx_phi_log_c(1:n), 'Phase Est', [1 n -4 4])
+stem_sig_and_error(5, 211, real(rx_symb_log_c(1:n)), real(rx_symb_log(1:n) - rx_symb_log_c(1:n)), 'rx symb re', [1 n -1.5 1.5])
+stem_sig_and_error(5, 212, imag(rx_symb_log_c(1:n)), imag(rx_symb_log(1:n) - rx_symb_log_c(1:n)), 'rx symb im', [1 n -1.5 1.5])
+stem_sig_and_error(6, 111, rx_bits_log_c(1:n), rx_bits_log(1:n) - rx_bits_log_c(1:n), 'rx bits', [1 n -1.5 1.5])
 
 check(tx_bits_log, tx_bits_log_c, 'tx_bits');
 check(tx_symb_log, tx_symb_log_c, 'tx_symb');
 check(rx_amp_log, rx_amp_log_c, 'rx_amp_log');
 check(rx_phi_log, rx_phi_log_c, 'rx_phi_log');
 check(rx_symb_log, rx_symb_log_c, 'rx_symb');
+check(rx_bits_log, rx_bits_log_c, 'rx_bits');
+
+% Determine bit error rate
+
+sz = length(tx_bits_log_c);
+Nerrs_c = sum(xor(tx_bits_log_c(framesize+1:sz-framesize), rx_bits_log_c(2*framesize+1:sz)));
+Tbits_c = sz - 2*framesize;
+ber_c = Nerrs_c/Tbits_c;
+ber = Nerrs/Tbits;
+printf("EsNodB: %4.1f ber..: %3.2f Nerrs..: %d Tbits..: %d\n", EsNodB, ber, Nerrs, Tbits);
+printf("EsNodB: %4.1f ber_c: %3.2f Nerrs_c: %d Tbits_c: %d\n", EsNodB, ber_c, Nerrs_c, Tbits_c);
+ 
+% C header file of noise samples so C version gives extacly the same results
+
+function write_noise_file(noise_log)
+
+  [m n] = size(noise_log);
+
+  filename = sprintf("../unittest/noise_samples.h");
+  f=fopen(filename,"wt");
+  fprintf(f,"/* Generated by write_noise_file() Octave function */\n\n");
+  fprintf(f,"COMP noise[][PILOTS_NC]={\n");
+  for r=1:m
+    fprintf(f, "  {");
+    for c=1:n-1
+      fprintf(f, "  {%f,%f},", real(noise_log(r, c)), imag(noise_log(r, c)));
+    end
+    if r < m
+      fprintf(f, "  {%f,%f}},\n", real(noise_log(r, n)), imag(noise_log(r, n)));
+    else
+      fprintf(f, "  {%f,%f}}\n};", real(noise_log(r, n)), imag(noise_log(r, n)));
+    end
+  end
+
+  fclose(f);
+endfunction

diff --git a/codec2-dev/octave/test_cohpsk.m b/codec2-dev/octave/test_cohpsk.m
index cc78c952954d218a915f785d39b114a3571ac273..9efca1397fb6ad243e8ecb97e8d8ee620dad7894 100644 (file)
--- a/codec2-dev/octave/test_cohpsk.m
+++ b/codec2-dev/octave/test_cohpsk.m
@@ -105,8 +105,8 @@ function test_single
   sim_in.ldpc_code_rate   = 1;
   sim_in.ldpc_code        = 0;
 
-  sim_in.Ntrials          = 20;
-  sim_in.Esvec            = 100; 
+  sim_in.Ntrials          = 35;
+  sim_in.Esvec            = 8; 
   sim_in.hf_sim           = 0;
   sim_in.hf_mag_only      = 0;
   sim_in.modulation       = 'qpsk';
@@ -469,11 +469,13 @@ function rate_Fs_rx(rx_filename)
   subplot(211)
   plot(phi_x, phi_log(:,1),'r+;Estimated HF channel phase;')
   ylabel('Phase (rads)');
+  legend('boxoff');
 
   subplot(212)
   plot(phi_x, amp_log(:,1),'r+;Estimated HF channel amp;')
   ylabel('Amplitude');
   xlabel('Time (symbols)');
+  legend('boxoff');
 
   figure(6);
   clf

diff --git a/codec2-dev/src/cohpsk.c b/codec2-dev/src/cohpsk.c
index 5bd4a92baa944f4a8e8b0b6fc0e2ed4a1286cfa4..467a21a34a3335eb1fcc92d7aea158fcd3eab200 100644 (file)
--- a/codec2-dev/src/cohpsk.c
+++ b/codec2-dev/src/cohpsk.c
@@ -252,18 +252,15 @@ void qpsk_symbols_to_bits(struct COHPSK *coh, int rx_bits[], COMP rx_symb[][COHP
             /* demodulate */
 
             i = c*NSYMROW + r;
-            rot = cmult(rx_symb[data_r][c], pi_on_4);
-            rx_bits[2*i]   = rot.real < 0;
-            rx_bits[2*i+1] = rot.imag < 0;
+            rot = cmult(coh->rx_symb_buf[data_r][c], pi_on_4);
+            rx_bits[2*i+1] = rot.real < 0;
+            rx_bits[2*i]   = rot.imag < 0;
 
             //printf("  c: %d ch_est: %f %f phi_: %f amp_: %f\n",c,  ch_est.real, ch_est.imag, coh->phi_[r][c], coh->amp_[r][c]);
         }
         //exit(0);
     }
 
-    r = NSYMROW+19; c = 0;
-    //printf("%d %d %f %f\n", r,c, coh->rx_symb_buf[r][c].real, coh->rx_symb_buf[r][c].imag);
-
     /* shift buffers */
     
     for(r=0; r<2*NSYMROW; r++) {
@@ -275,8 +272,5 @@ void qpsk_symbols_to_bits(struct COHPSK *coh, int rx_bits[], COMP rx_symb[][COHP
         for(c=0; c<PILOTS_NC; c++) {
             coh->rx_pilot_buf[r][c] = coh->rx_pilot_buf[r+NPILOTSFRAME][c];
         }
-    }
-    r = 19; c = 0;
-    //printf("%d %d %f %f\n", r,c, coh->rx_symb_buf[r][c].real, coh->rx_symb_buf[r][c].imag);
-
+    } 
 }

diff --git a/codec2-dev/unittest/noise_samples.h b/codec2-dev/unittest/noise_samples.h
new file mode 100644 (file)
index 0000000..4351458
--- /dev/null
+++ b/codec2-dev/unittest/noise_samples.h
@@ -0,0 +1,879 @@
+/* Generated by write_noise_file() Octave function */
+
+float pilots_coh[][PILOTS_NC]={
+  {  -0.750637,  -0.169150,  -0.198189,  0.149946,98189,-0.739629},  {0.149946,0.156191}},
+  {  {-0.207799,-0.082395},  {-0.012774,-0.024059},  {-0.542473,0.150651},  {-0.557826,0.080852}},
+  {  {0.424481,-0.439771},  {0.241057,-0.095271},  {-0.122474,0.176513},  {-0.149839,-0.775902}},
+  {  {0.169449,-0.087091},  {0.057882,0.155138},  {-0.391015,0.682880},  {-0.047971,0.543943}},
+  {  {-0.126863,0.065765},  {-0.073408,-0.274510},  {-0.234292,-0.153578},  {0.267075,0.469822}},
+  {  {-0.198585,0.031338},  {0.032354,0.302185},  {0.517222,-0.257059},  {-0.070852,0.045672}},
+  {  {-0.119477,-0.150342},  {0.260492,0.059694},  {-0.386988,-0.751987},  {-0.015045,0.245076}},
+  {  {0.153618,0.043296},  {-0.093370,-0.231196},  {0.311326,0.320627},  {-0.358093,0.393267}},
+  {  {0.476120,-0.170839},  {0.088240,0.576671},  {-0.468749,-0.416425},  {0.188985,-0.197548}},
+  {  {0.106220,0.206540},  {-0.077208,0.274809},  {-0.158754,0.316251},  {-0.116200,0.398616}},
+  {  {0.005197,0.294655},  {-0.206240,-0.190517},  {-0.265506,-0.114146},  {-0.028927,-0.229450}},
+  {  {-0.327728,-0.591345},  {-0.264472,-0.326577},  {-0.319878,-0.049284},  {0.158014,0.121971}},
+  {  {0.333520,-0.031147},  {0.003040,-0.135846},  {0.106355,0.082121},  {-0.283272,0.084046}},
+  {  {-0.343361,-0.506014},  {-0.185367,0.071766},  {-0.235493,0.170638},  {-0.445364,0.118883}},
+  {  {0.030208,-0.084031},  {0.409588,-0.179503},  {-0.482369,0.171370},  {-0.235941,0.080570}},
+  {  {-0.163495,0.582012},  {0.029252,0.076722},  {0.026239,-0.047555},  {-0.291130,-0.030024}},
+  {  {0.233385,-0.043682},  {0.384037,-0.158860},  {-0.273275,-0.230238},  {-0.213361,-0.404230}},
+  {  {-0.023375,-0.118087},  {-0.725656,-0.340884},  {0.341971,0.093778},  {-0.523398,0.051230}},
+  {  {0.341573,0.080278},  {0.411039,0.144772},  {0.337592,-0.284542},  {0.143894,-0.287883}},
+  {  {-0.049250,-0.062392},  {-0.237897,-0.255614},  {0.594200,0.139619},  {-0.033038,-0.213744}},
+  {  {0.073954,0.409955},  {-0.003634,0.002362},  {0.324892,0.180648},  {0.083703,0.095812}},
+  {  {0.094269,0.227403},  {0.205705,0.392200},  {-0.207251,0.112733},  {-0.268652,-0.303959}},
+  {  {-0.678356,-0.181429},  {-0.449746,0.622208},  {-0.030572,0.012442},  {0.237300,0.199256}},
+  {  {-0.119067,0.295658},  {-0.277609,-0.358077},  {-0.277796,-0.003471},  {0.121675,0.248683}},
+  {  {-0.114906,-0.038697},  {0.130222,0.044976},  {0.327228,-0.412443},  {0.660641,-0.037530}},
+  {  {0.569286,0.227664},  {0.268515,-0.039355},  {-0.184280,0.265188},  {-0.015837,-0.271356}},
+  {  {-0.027961,-0.080279},  {0.613017,-0.142081},  {-0.148378,0.191099},  {-0.394520,-0.171700}},
+  {  {-0.198314,-0.009023},  {-0.407328,0.108614},  {0.372154,-0.037212},  {0.675887,0.264015}},
+  {  {0.228980,0.237428},  {0.126555,0.117235},  {0.402235,0.191166},  {0.506753,0.333828}},
+  {  {0.194145,0.320122},  {0.062956,0.705506},  {0.190924,-0.341264},  {-0.623968,-0.297513}},
+  {  {0.224056,-0.010422},  {0.135507,0.159078},  {0.369115,0.176294},  {-0.317725,-0.151294}},
+  {  {-0.383506,-0.238362},  {-0.324011,0.057282},  {-0.274604,-0.047381},  {0.277525,-0.358549}},
+  {  {-0.215697,-0.588638},  {-0.128376,-0.230927},  {0.535021,-0.163071},  {0.043876,-0.185057}},
+  {  {0.244435,-0.374774},  {-0.086461,0.104828},  {-0.700383,-0.174090},  {-0.589216,-0.435133}},
+  {  {-0.240667,0.144112},  {0.180207,0.363533},  {0.246474,0.179655},  {-0.457104,0.205039}},
+  {  {-0.131872,0.443207},  {-0.247986,0.070223},  {-0.127800,-0.212280},  {-0.347726,-0.404625}},
+  {  {-0.414375,0.279466},  {-0.013539,0.504233},  {-0.295185,0.052245},  {0.424058,-0.081735}},
+  {  {0.136434,-0.033282},  {-0.713914,-0.135201},  {-0.788441,0.694102},  {0.039437,0.201192}},
+  {  {-0.249947,-0.591067},  {-0.011299,0.409663},  {-0.244712,0.393058},  {0.787304,-0.019331}},
+  {  {0.092214,0.064805},  {-0.122779,-0.306884},  {0.026603,-0.035376},  {-0.313137,-0.278021}},
+  {  {-0.449133,0.100669},  {0.213763,0.114155},  {0.198330,0.219683},  {-0.284401,-0.035136}},
+  {  {-0.079223,0.368838},  {-0.228556,-0.207711},  {0.072793,0.351840},  {0.360625,0.030095}},
+  {  {-0.070576,0.119426},  {0.161652,-0.225144},  {-0.196486,-0.205592},  {0.075950,0.010825}},
+  {  {-0.273783,-0.169569},  {0.196193,-0.611403},  {0.426909,0.036470},  {0.174337,-0.301462}},
+  {  {-0.049598,0.184766},  {-0.283231,-0.244950},  {0.453568,0.003957},  {0.415593,-0.576587}},
+  {  {-0.239989,-0.319452},  {-0.024350,-0.220417},  {0.498768,0.416310},  {-0.176612,-0.054317}},
+  {  {-0.044332,0.011365},  {0.134760,0.231953},  {-0.158193,-0.110258},  {0.391388,0.363376}},
+  {  {0.013925,0.055840},  {0.331354,0.092750},  {0.231037,-0.162999},  {0.335371,0.318295}},
+  {  {0.129043,0.697470},  {-0.033113,-0.079267},  {0.003693,-0.383891},  {-0.327320,-0.343125}},
+  {  {0.536432,0.308010},  {0.016166,-0.026355},  {0.160359,0.235783},  {-0.208461,-0.225741}},
+  {  {0.190603,-0.113880},  {-0.063480,-0.155972},  {0.366982,0.201820},  {0.023565,0.802017}},
+  {  {0.282362,0.290370},  {-0.087651,0.095848},  {0.304063,-0.519349},  {0.339344,0.091272}},
+  {  {0.294241,0.078683},  {0.216384,0.044954},  {0.088316,0.056581},  {-0.591483,0.234643}},
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+  {  {-0.005407,0.153375},  {0.326402,0.060740},  {0.290711,0.172841},  {0.409211,-0.141028}},
+  {  {-0.113567,0.071332},  {0.015458,0.126351},  {0.284529,0.180460},  {-0.700352,0.143537}},
+  {  {0.271442,0.114144},  {-0.619357,-0.123591},  {0.475729,0.076111},  {0.444297,0.286228}},
+  {  {0.264773,-0.237365},  {0.023818,0.563823},  {0.130032,0.085195},  {0.229399,0.037323}},
+  {  {-0.484696,0.124113},  {0.085900,-0.055420},  {-0.091183,0.200187},  {-0.062178,-0.098489}},
+  {  {-0.236513,-0.360860},  {0.003417,-0.267469},  {0.129667,-0.158791},  {0.049538,-0.409947}},
+  {  {0.255042,0.333242},  {-0.157095,-0.117623},  {0.269565,-0.379136},  {-0.373459,0.209706}},
+  {  {0.175282,-0.103688},  {-0.035506,-0.016863},  {0.242469,-0.138987},  {0.018964,-0.368706}},
+  {  {-0.436314,-0.086232},  {0.350027,0.121991},  {0.017147,-0.179083},  {0.086714,0.222335}},
+  {  {-0.155665,-0.683861},  {0.265249,-0.038379},  {0.175880,-0.160403},  {-0.289620,-0.106358}},
+  {  {-0.270386,-0.548841},  {-0.892965,0.661359},  {-0.173937,0.079489},  {0.097853,-0.496588}},
+  {  {0.176678,-0.031578},  {0.425756,0.353226},  {-0.249492,0.004345},  {0.429392,-0.065144}},
+  {  {0.040970,-0.006643},  {0.474779,0.519027},  {-0.434614,0.036193},  {-0.297140,-0.199760}},
+  {  {-0.349348,0.095671},  {-0.217545,0.497003},  {0.229333,0.204164},  {0.183723,0.054213}},
+  {  {0.627523,-0.132003},  {0.414922,-0.207594},  {-0.060518,-0.112704},  {0.111296,0.309715}},
+  {  {-0.447887,0.148215},  {-0.458216,-0.439480},  {-0.308149,-0.044863},  {0.318667,0.183143}},
+  {  {-0.116899,-0.295075},  {0.665278,0.102565},  {0.208556,-0.166291},  {0.337050,0.200414}},
+  {  {0.463266,-0.105257},  {-0.116619,-0.104356},  {0.009105,-0.504449},  {0.356936,0.466396}},
+  {  {-0.003930,0.069645},  {0.363183,0.241183},  {0.943932,-0.164304},  {0.056710,-0.284049}},
+  {  {0.167467,-0.072575},  {-0.243166,-0.075108},  {0.039487,-0.425519},  {0.176687,0.184184}},
+  {  {0.073522,-0.429456},  {-0.490993,0.304487},  {-0.010361,0.292852},  {-0.110772,-0.331516}},
+  {  {-0.444811,0.266264},  {0.144467,0.342760},  {0.269047,0.038791},  {-0.059013,0.304606}},
+  {  {-0.718936,-0.316461},  {0.106222,0.180340},  {0.002654,-0.328146},  {0.326098,0.166166}},
+  {  {0.682774,0.138110},  {0.133092,0.070017},  {0.406606,-0.060298},  {0.044134,-0.567706}},
+  {  {0.218301,-0.222084},  {-0.249033,0.111984},  {-0.240028,-0.038628},  {-0.076397,-0.328831}},
+  {  {0.240195,-0.192697},  {-0.049095,-0.020532},  {0.184800,0.248373},  {-0.107797,-0.215315}},
+  {  {0.282405,0.218027},  {0.689576,0.209545},  {0.230194,0.070232},  {-0.148190,0.120725}},
+  {  {0.001280,0.160150},  {-0.171090,-0.077593},  {0.080757,-0.357525},  {0.425190,0.071998}},
+  {  {-0.399293,-0.057862},  {-0.278881,0.369177},  {0.660429,0.021882},  {-0.247306,0.010255}},
+  {  {-0.372683,-0.054390},  {0.233675,-0.575181},  {-0.193380,0.039631},  {0.780341,-0.297500}},
+  {  {-0.021256,0.162674},  {0.188968,-0.170429},  {-0.177897,-0.054397},  {-0.111671,-0.705913}},
+  {  {0.167206,0.005994},  {0.261893,-0.310677},  {0.348813,-0.165625},  {0.272079,0.147623}},
+  {  {0.282788,0.450844},  {0.670252,-0.045115},  {-0.232873,0.167656},  {0.237266,-0.167403}},
+  {  {-0.432778,-0.004933},  {0.191563,0.141671},  {-0.333580,0.387492},  {-0.251357,-0.326546}},
+  {  {0.189885,0.021115},  {-0.345198,-0.039455},  {-0.606831,0.035055},  {0.008302,0.150339}},
+  {  {0.149662,0.028556},  {-0.352265,-0.061472},  {-0.328494,0.070046},  {-0.084629,-0.033776}},
+  {  {-0.393803,-0.175243},  {0.098778,0.319484},  {0.635575,-0.074077},  {0.272303,0.081426}},
+  {  {0.347321,-0.208954},  {-0.305327,-0.101401},  {-0.159838,-0.190008},  {0.320577,-0.230657}},
+  {  {-0.354666,0.221640},  {0.054974,0.039057},  {-0.102788,0.175127},  {-0.078936,-0.031547}},
+  {  {-0.094802,0.116260},  {0.192542,-0.242659},  {-0.020726,0.112136},  {-0.234005,0.303896}},
+  {  {0.338323,0.400542},  {0.173088,-0.167962},  {0.275075,-0.355857},  {0.032675,0.394586}},
+  {  {-0.121956,0.205782},  {0.386040,0.283440},  {0.196377,-0.476216},  {0.296771,-0.082415}},
+  {  {0.053290,0.251205},  {0.013283,-0.439975},  {-0.343783,-0.035132},  {-0.388895,-0.417480}},
+  {  {-0.221704,0.308375},  {0.018026,-0.399619},  {-0.043163,-0.050631},  {-0.039951,-0.377403}},
+  {  {-0.016731,-0.245156},  {-0.327890,0.019541},  {0.548853,-0.495454},  {0.179951,0.088605}},
+  {  {-0.007942,0.145052},  {-0.061160,-0.094042},  {0.034180,-0.182565},  {-0.477157,0.521269}},
+  {  {-0.409371,0.211094},  {-0.199085,0.160954},  {-0.146090,-0.168790},  {-0.138481,0.033407}},
+  {  {0.305289,0.494550},  {-0.132562,-0.026627},  {0.331440,-0.270939},  {0.400129,0.006980}},
+  {  {0.017709,0.477184},  {0.115615,-0.686163},  {-0.232599,0.010193},  {-0.030466,0.372934}},
+  {  {0.316832,0.162987},  {-0.160059,0.195700},  {0.006744,-0.072664},  {0.327453,-0.216116}},
+  {  {0.209876,0.506287},  {0.031023,0.080605},  {0.038732,0.164244},  {0.251549,0.053644}},
+  {  {0.229321,0.281343},  {-0.137941,-0.520068},  {0.065785,0.025930},  {0.016833,-0.052879}},
+  {  {-0.237999,0.025132},  {0.259859,0.432569},  {-0.493253,0.033327},  {0.591210,0.313192}},
+  {  {-0.228422,-0.078936},  {-0.122042,0.335354},  {0.037804,0.288142},  {0.063791,0.434678}},
+  {  {-0.224809,0.301278},  {0.566415,-0.063526},  {-0.155378,-0.494862},  {-0.155127,0.350880}},
+  {  {-0.335870,0.303514},  {0.289612,0.341449},  {0.009257,0.010707},  {-0.020231,-0.038568}},
+  {  {0.680252,-0.465089},  {0.397681,-0.433497},  {0.247393,-0.107111},  {0.058676,0.168195}},
+  {  {0.039578,-0.348684},  {-0.024993,0.327516},  {0.096453,0.457663},  {0.130413,0.135843}},
+  {  {-0.467869,-0.361154},  {0.155096,-0.131328},  {-0.304657,-0.308348},  {-0.073965,0.030247}},
+  {  {-0.201437,0.001473},  {0.446996,0.423075},  {-0.061201,0.237662},  {-0.350719,-0.212199}},
+  {  {0.331177,0.111346},  {-0.372870,-0.172531},  {0.167177,-0.245025},  {0.223442,0.127694}},
+  {  {-0.014620,-0.379008},  {0.032066,-0.446978},  {0.065415,0.126669},  {0.045734,-0.016189}},
+  {  {-0.401781,-0.024779},  {-0.043161,0.215822},  {-0.611732,0.167876},  {-0.250995,0.577554}},
+  {  {-0.082351,0.133760},  {0.268943,0.122705},  {0.090022,-0.171535},  {0.173245,0.122200}},
+  {  {-0.105657,-0.054048},  {0.277628,-0.059633},  {0.139341,-0.061801},  {0.054982,0.120608}},
+  {  {-0.564556,0.329524},  {-0.205449,-0.245544},  {0.134283,-0.239716},  {0.172456,0.317787}},
+  {  {0.240893,0.027910},  {-0.779836,0.334224},  {-0.163845,-0.096801},  {-0.214915,0.015389}},
+  {  {-0.491458,-0.236569},  {0.723136,0.120896},  {-0.279355,0.049278},  {0.040787,-0.100651}},
+  {  {-0.014526,0.254337},  {0.231298,0.077235},  {-0.300233,0.054249},  {-0.139203,-0.142036}},
+  {  {-0.010942,0.015491},  {-0.087115,0.013235},  {-0.147881,0.113229},  {-0.198188,-0.071774}},
+  {  {0.034825,-0.162960},  {-0.086402,-0.134662},  {-0.110036,-0.158377},  {-0.324578,-0.560300}},
+  {  {0.151523,0.098134},  {-0.192342,-0.244164},  {-0.427821,-0.143494},  {0.105182,-0.229518}},
+  {  {-0.243838,-0.207873},  {0.026748,-0.402442},  {0.643881,0.018653},  {-0.143612,0.044430}},
+  {  {-0.302882,-0.407361},  {-0.277802,0.102274},  {0.624597,-0.718286},  {-0.217515,0.054275}},
+  {  {0.742662,0.258210},  {0.515132,0.314964},  {0.223835,-0.368202},  {0.599708,-0.322687}},
+  {  {-0.027426,0.063008},  {-0.213694,-0.433592},  {0.146057,0.273598},  {-0.166725,-0.022171}},
+  {  {0.049245,-0.134684},  {-0.018353,-0.150306},  {0.001657,0.222507},  {-0.438816,0.298313}},
+  {  {-0.149907,0.134112},  {0.444079,-0.317764},  {-0.009438,-0.125807},  {0.041038,-0.118273}},
+  {  {0.551577,-0.029592},  {-0.358377,0.214297},  {-0.187758,0.123273},  {-0.562108,-0.254053}},
+  {  {0.089962,-0.461756},  {0.243228,0.378552},  {-0.329504,0.130369},  {0.795833,-0.118606}},
+  {  {-0.143847,0.233914},  {-0.065432,-0.009538},  {-0.045932,-0.456904},  {-0.095123,-0.027405}},
+  {  {-0.650994,-0.042882},  {-0.106258,0.195841},  {-0.054224,0.156926},  {0.134335,0.313253}},
+  {  {-0.069158,-0.568228},  {0.045789,-0.089844},  {-0.220245,-0.093721},  {0.063417,0.089514}},
+  {  {0.011381,0.586498},  {-0.437604,-0.164288},  {-0.169189,0.017737},  {-0.321377,-0.023027}},
+  {  {0.213454,-0.023227},  {-0.435901,-0.083661},  {0.329689,-0.162721},  {0.174870,-0.275193}},
+  {  {-0.132195,0.354806},  {0.371000,-0.179897},  {-0.041212,0.302581},  {-0.546320,-0.306548}},
+  {  {0.082207,0.211989},  {-0.119913,-0.175620},  {0.144611,-0.331013},  {0.115176,-0.592770}},
+  {  {-0.004779,0.251080},  {0.455567,0.012934},  {0.006712,0.003697},  {-0.075832,0.070085}},
+  {  {-0.475533,0.038234},  {-0.160870,-0.307172},  {0.056282,-0.341745},  {-0.062199,-0.345588}},
+  {  {-0.190724,0.182430},  {0.039671,0.035041},  {-0.263546,-0.095662},  {-0.056137,0.178071}},
+  {  {-0.281846,-0.543699},  {-0.140531,-0.459541},  {-0.021084,-0.128409},  {0.044652,0.038068}},
+  {  {-0.117599,0.498785},  {0.024698,0.446429},  {0.313370,-0.140753},  {-0.574128,-0.067568}},
+  {  {0.104019,-0.137892},  {-0.056605,0.212533},  {0.248536,0.093597},  {-0.145855,-0.269298}},
+  {  {0.645233,0.235739},  {0.369417,-0.231321},  {0.892515,-0.429466},  {0.221230,0.172989}},
+  {  {0.660023,0.188262},  {-0.314714,0.198499},  {-0.273496,-0.008311},  {-0.065954,0.026514}},
+  {  {0.143684,0.140383},  {0.231764,0.188496},  {-0.068177,-0.277947},  {0.753748,-0.505820}},
+  {  {-0.072658,-0.334230},  {0.050335,-0.461555},  {0.733732,0.438314},  {0.083266,0.363720}},
+  {  {-0.293573,0.039348},  {0.350445,0.130303},  {0.000060,-0.249070},  {-0.135674,0.317709}},
+  {  {-0.142936,0.329291},  {-0.338889,0.402064},  {0.216202,0.014242},  {-0.183612,-0.109445}},
+  {  {-0.283113,-0.328312},  {0.101481,-0.190903},  {0.269143,-0.066795},  {-0.477870,-0.169084}},
+  {  {-0.332132,0.075855},  {0.459367,0.548948},  {0.228574,-0.027249},  {0.597990,0.420692}},
+  {  {0.338707,0.185517},  {0.123306,0.254570},  {-0.567387,-0.017971},  {-0.159632,0.724618}},
+  {  {-0.099857,-0.023261},  {0.202366,-0.446425},  {-0.017213,-0.175690},  {-0.179668,0.191014}},
+  {  {-0.295693,0.050115},  {-0.229870,0.418125},  {0.081928,-0.042068},  {-0.217694,-0.498772}},
+  {  {0.270821,0.424281},  {0.098372,0.107956},  {-0.296930,0.012717},  {0.074703,-0.093238}},
+  {  {0.035538,-0.258941},  {-0.105462,0.264650},  {0.150153,-0.255382},  {-0.347271,0.027627}},
+  {  {-0.146697,0.195532},  {0.271766,0.285808},  {0.427760,0.313798},  {0.146033,-0.204501}},
+  {  {-0.174687,-0.130912},  {-0.072116,-0.220196},  {0.005406,0.079367},  {-0.341387,-0.337282}},
+  {  {0.040776,-0.273468},  {0.162054,-0.293889},  {-0.095893,-0.073910},  {-0.153809,0.072013}},
+  {  {-0.399039,0.197391},  {-0.122582,0.025539},  {0.093073,0.185761},  {-0.147191,-0.100242}},
+  {  {0.159192,-0.188934},  {0.319853,0.503711},  {0.298025,0.284095},  {0.367592,0.333317}},
+  {  {0.259993,-0.223631},  {0.133688,-0.150725},  {0.371685,-0.286109},  {-0.128682,-0.205815}},
+  {  {0.301786,0.145686},  {-0.006231,-0.053463},  {-0.399470,0.347937},  {0.287029,0.144095}},
+  {  {-0.124526,-0.006985},  {-0.215361,-0.302206},  {-0.276933,0.153569},  {-0.299072,-0.396968}},
+  {  {-0.099547,-0.038670},  {-0.116547,-0.446520},  {-0.066402,0.597855},  {0.409473,-0.366261}},
+  {  {-0.097590,0.516989},  {-0.371481,-0.084358},  {0.139753,0.066608},  {0.043319,0.038938}},
+  {  {0.411728,0.249545},  {-0.229102,-0.071913},  {-0.366588,0.203653},  {-0.060501,-0.150898}},
+  {  {-0.244834,-0.164805},  {-0.043895,0.460592},  {0.516437,0.606527},  {-0.564238,0.156219}},
+  {  {0.063852,-0.480668},  {-0.261661,0.276559},  {0.024709,0.018977},  {0.120096,-0.065969}},
+  {  {-0.459615,0.225288},  {0.205790,-0.091607},  {-0.481009,0.485888},  {0.095197,-0.591906}},
+  {  {-0.229465,-0.378202},  {-0.401284,0.408425},  {-0.439732,0.162614},  {0.463624,0.074766}},
+  {  {0.324169,-0.425729},  {0.373437,-0.006803},  {0.097621,-0.335840},  {-0.310547,0.302224}},
+  {  {0.353228,0.016554},  {0.202199,0.371007},  {0.065840,-0.013911},  {-0.039032,-0.139574}},
+  {  {-0.203928,-0.339581},  {0.063513,-0.385976},  {0.050521,-0.087251},  {0.055797,-0.053225}},
+  {  {-0.094803,-0.144163},  {0.324038,-0.011558},  {0.213554,-0.242747},  {0.103304,0.006201}}
+};
\ No newline at end of file

diff --git a/codec2-dev/unittest/tcohpsk.c b/codec2-dev/unittest/tcohpsk.c
index d5999098051eb3971398de19c9d014377363fd75..13665c33b1822f744f9fe15e9bc5cac40408c1fd 100644 (file)
--- a/codec2-dev/unittest/tcohpsk.c
+++ b/codec2-dev/unittest/tcohpsk.c
@@ -42,6 +42,7 @@
 #include "test_bits_coh.h"
 #include "octave.h"
 #include "comp_prim.h"
+#include "noise_samples.h"
 
 #define FRAMES 35
 #define RS     50
@@ -57,6 +58,7 @@ int main(int argc, char *argv[])
     
     int            tx_bits_log[COHPSK_BITS_PER_FRAME*FRAMES];
     COMP           tx_symb_log[NSYMROWPILOT*FRAMES][PILOTS_NC];
+    COMP           ch_symb_log[NSYMROWPILOT*FRAMES][PILOTS_NC];
 
     float          rx_amp_log[NSYMROW*FRAMES][PILOTS_NC];
     float          rx_phi_log[NSYMROW*FRAMES][PILOTS_NC];
@@ -64,14 +66,14 @@ int main(int argc, char *argv[])
     int            rx_bits_log[COHPSK_BITS_PER_FRAME*FRAMES];
                                           
     FILE          *fout;
-    int            f, r, c, log_r, log_data_r;
+    int            f, r, c, log_r, log_data_r, noise_r;
     COMP           phase, freq;
     int           *ptest_bits_coh, *ptest_bits_coh_end;
 
     coh = cohpsk_create();
     assert(coh != NULL);
 
-    log_r = log_data_r= 0;
+    log_r = log_data_r = noise_r = 0;
     ptest_bits_coh = (int*)test_bits_coh;
     ptest_bits_coh_end = (int*)test_bits_coh + sizeof(test_bits_coh)/sizeof(int);
 
@@ -92,10 +94,13 @@ int main(int argc, char *argv[])
             ptest_bits_coh = (int*)test_bits_coh;
        bits_to_qpsk_symbols(tx_symb, (int*)tx_bits, COHPSK_BITS_PER_FRAME);
 
-        for(r=0; r<NSYMROWPILOT; r++) {
+        for(r=0; r<NSYMROWPILOT; r++,noise_r++) {
             phase = cmult(phase,freq);
-            for(c=0; c<PILOTS_NC; c++)
-                ch_symb[r][c] = cmult(tx_symb[r][c], phase);
+            for(c=0; c<PILOTS_NC; c++) {
+                ch_symb[r][c] = cadd(cmult(tx_symb[r][c], phase), noise[noise_r][c]);
+                //printf("%d %d %f %f \n",r,c,ch_symb[r][c].real, ch_symb[r][c].imag);
+                //ch_symb[r][c] = cmult(tx_symb[r][c], phase);
+             }
         }
         phase = fcmult(1.0/cabsolute(phase), phase);
 
@@ -107,8 +112,10 @@ int main(int argc, char *argv[])
 
        memcpy(&tx_bits_log[COHPSK_BITS_PER_FRAME*f], tx_bits, sizeof(int)*COHPSK_BITS_PER_FRAME);
        for(r=0; r<NSYMROWPILOT; r++, log_r++) {
-            for(c=0; c<PILOTS_NC; c++) 
+            for(c=0; c<PILOTS_NC; c++) {
                tx_symb_log[log_r][c] = tx_symb[r][c]; 
+               ch_symb_log[log_r][c] = ch_symb[r][c]; 
+            }
         }
 
        for(r=0; r<NSYMROW; r++, log_data_r++) {
@@ -121,6 +128,7 @@ int main(int argc, char *argv[])
        memcpy(&rx_bits_log[COHPSK_BITS_PER_FRAME*f], rx_bits, sizeof(int)*COHPSK_BITS_PER_FRAME);
 
        assert(log_r <= NSYMROWPILOT*FRAMES);
+       assert(noise_r <= NSYMROWPILOT*FRAMES);
        assert(log_data_r <= NSYMROW*FRAMES);
     }
 
@@ -134,6 +142,7 @@ int main(int argc, char *argv[])
     fprintf(fout, "# Created by tcohpsk.c\n");
     octave_save_int(fout, "tx_bits_log_c", tx_bits_log, 1, COHPSK_BITS_PER_FRAME*FRAMES);
     octave_save_complex(fout, "tx_symb_log_c", (COMP*)tx_symb_log, NSYMROWPILOT*FRAMES, PILOTS_NC, PILOTS_NC);  
+    octave_save_complex(fout, "ch_symb_log_c", (COMP*)ch_symb_log, NSYMROWPILOT*FRAMES, PILOTS_NC, PILOTS_NC);  
     octave_save_float(fout, "rx_amp_log_c", (float*)rx_amp_log, NSYMROW*FRAMES, PILOTS_NC, PILOTS_NC);  
     octave_save_float(fout, "rx_phi_log_c", (float*)rx_phi_log, NSYMROW*FRAMES, PILOTS_NC, PILOTS_NC);  
     octave_save_complex(fout, "rx_symb_log_c", (COMP*)rx_symb_log, NSYMROW*FRAMES, PILOTS_NC, PILOTS_NC);