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| author | priyanka | 2015-06-24 15:03:17 +0530 |
|---|---|---|
| committer | priyanka | 2015-06-24 15:03:17 +0530 |
| commit | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (patch) | |
| tree | ab291cffc65280e58ac82470ba63fbcca7805165 /40/CH7/EX7.9 | |
| download | Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.tar.gz Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.tar.bz2 Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.zip | |
initial commit / add all books
Diffstat (limited to '40/CH7/EX7.9')
| -rwxr-xr-x | 40/CH7/EX7.9/Exa_7_9.sce | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/40/CH7/EX7.9/Exa_7_9.sce b/40/CH7/EX7.9/Exa_7_9.sce new file mode 100755 index 000000000..dd88eaf73 --- /dev/null +++ b/40/CH7/EX7.9/Exa_7_9.sce @@ -0,0 +1,21 @@ +//(a)Quantisation effects
+sig=0.005;
+D=4;
+B=log2(D/(sig*sqrt(12)));//no.of samples
+//value of B to ensure quantisation error to 5mv
+//(b)Quantisation error and noise
+xn=0:0.2:2.0;
+xqn=[0 0 0.5 0.5 1 1 1 1.5 1.5 2 2];
+en=xn-xqn;//quantization error
+//Quantisation signal top noise ratio
+x=0;e=0;
+for i=1:length(xn)
+ x=x+xn(i)^2;
+ e=e+en(i)^2;
+end
+//method 1
+SNRQ=10*log10(x/e)
+//method 2
+SNRQ=10*log10(x/length(xn))+10.8+20*log10(4)-20*log10(2)
+SNRS=10*log10(1.33)+10*log10(12)+20*log10(4)-20*log10(2)
+//from results we see that SNRS is statistical estimate
\ No newline at end of file |