X-Git-Url: https://adrianiainlam.tk/git/?p=4yp.git;a=blobdiff_plain;f=phasenoise1signal.m;h=e2240b957d1ec9933b1550455baa9b98f459ee9d;hp=f819e653fe0a75b9d78f2b0d5ce78678ea0350be;hb=5fae00773184080617ac022c07495d365975e0e1;hpb=427465905320390cebf3d247b8beace19387c70f

diff --git a/phasenoise1signal.m b/phasenoise1signal.m
index f819e65..e2240b9 100644
--- a/phasenoise1signal.m
+++ b/phasenoise1signal.m
@@ -4,7 +4,7 @@ M = 4;
 Rsym = 2.5e10; % symbol rate (sym/sec)
 rolloff = 0.5;
 span = 6; % filter span
-sps = 4; % samples per symbol
+sps = 8; % samples per symbol
 
 fs = Rsym * sps; % sampling freq (Hz)
 Tsamp = 1 / fs;
@@ -39,18 +39,19 @@ linewidthLO = 10e6; % Hz
 
 snr = EbN0_db + 10 * log10(log2(M)) - 10 * log10(sps);
 
-%%y = awgn(xPN, snr, 'measured');
 yPSK = awgn(xPSKpn, snr, 'measured');
 yDPSK = xDPSKpn;
 
 rPSK = rxFilter(yPSK, rolloff, span, sps);
 rDPSK = rxFilter(yDPSK, rolloff, span, sps);
 
+sps = 2;
+Tsamp = Tsamp * 4;
 
-rPSKSa = rPSK(sps*span/2+1:sps:(numSymbs+span/2)*sps);
-rDPSKSa = rDPSK(sps*span/2+1:sps:(numSymbs+span/2)*sps);
+rPSKSa = rPSK(1:2:end);
+rDPSKSa = rDPSK(1:2:end);
 
-[rPSKSaPhEq, phiestsPSK] = phaseNoiseCorr(rPSKSa, M, pi/M, 40);
+[rPSKSaPhEq, phiestsPSK] = phaseNoiseCorr(rPSKSa, M, pi/M, 80);
 
 demodPSK = pskdemod(rPSKSaPhEq, M, pi/M, 'gray');
 demodDPSK = dpskdemod(rDPSKSa, M, pi/M, 'gray');
@@ -60,9 +61,9 @@ demodDPSK = dpskdemod(rDPSKSa, M, pi/M, 'gray');
 
 
 figure(2);
-plot(t(1:40000), repelem(-phiestsPSK, sps));
+plot(t(1:80000), repelem(-phiestsPSK, 8));
 hold on;
-plot(t(1:40000), pTxLoPSK(1:40000));
+plot(t(1:80000), pTxLoPSK(1:80000));
 legend('estimate', 'actual');
 title('Phase noise estimation');
 hold off;