17 files changed, 479 insertions, 0 deletions
diff --git a/881/CH1/EX1.1/exa1_1.sce b/881/CH1/EX1.1/exa1_1.sce
new file mode 100755
index 000000000..eea8c0740
--- /dev/null
+++ b/881/CH1/EX1.1/exa1_1.sce
@@ -0,0 +1,20 @@
+clc
+//Example 1.1
+//Page no 6
+
+//Solution
+
+disp("Substituting into Eq 1.3 (ref pg no 4) yeilds,");
+
+ap=10*log10(200);   //absolute power ratio in dB
+
+disp('dB',ap,"The absolute power ratio is:");
+
+//absolute ratio: 200 = 100 X 2"
+
+disp("Applying the product rule for logarithms, the power gain in dB is:");
+
+Ap=10*log10(100)+10*log10(2);  //power gain in dB
+
+//Result
+disp('dB',Ap,"The power gain is, ")  
diff --git a/881/CH1/EX1.10/exa1_10.sce b/881/CH1/EX1.10/exa1_10.sce
new file mode 100755
index 000000000..5c940c122
--- /dev/null
+++ b/881/CH1/EX1.10/exa1_10.sce
@@ -0,0 +1,15 @@
+clc;
+//Example 1.10
+//Page no 22
+
+//Solution 
+
+disp("The formula T = C+273 is used to convert degree C into Kelvin. ");
+
+T1=100+273;
+T2=0+273;
+T3=-10+273;
+
+disp('K',T1,"(a) ");
+disp('K',T2,"(b) ");
+disp('K',T3,"(c) ");
diff --git a/881/CH1/EX1.11/exa1_11.sce b/881/CH1/EX1.11/exa1_11.sce
new file mode 100755
index 000000000..89a7faee8
--- /dev/null
+++ b/881/CH1/EX1.11/exa1_11.sce
@@ -0,0 +1,27 @@
+clc;
+//Example 1.11
+//Page no 24
+
+//Solution
+
+R=100;
+
+T=17+273;
+
+N=([1.38*(10^-23)]*[T]*[1*(10^4)]);
+
+disp('W',N,"N = "); 
+
+disp("Substituting in equation 1-16 (refer pgno 23) give the noise power in dBm: ");
+
+N1=-174+[10*log10(10000)];
+
+disp('dBm',N1,"N = ");
+
+//(b)
+
+disp("(b)The rms noise voltage is found by substituting into equation 1-17 (refer pgno 23): ");
+
+V=sqrt(4*R*N);
+
+disp('V',V,"Vn = ");  
diff --git a/881/CH1/EX1.12/exa1_12.sce b/881/CH1/EX1.12/exa1_12.sce
new file mode 100755
index 000000000..412ec2e7e
--- /dev/null
+++ b/881/CH1/EX1.12/exa1_12.sce
@@ -0,0 +1,43 @@
+clc;
+//Example 1.12
+//Page no 25
+
+
+//Solution
+
+V1=8;
+V2=0.2;
+V3=0.1;
+
+//(a)
+
+
+h1=2*1;
+
+disp('kHz',h1,"2nd harmonic = ");
+
+h2=3*1;
+
+disp('kHz',h2,"3rd harmonic = ");
+
+h3=12*1;
+
+disp('kHz',h3,"12th harmonic = ");
+
+//(b)
+
+disp("(b) ")
+
+p1=(V2/V1)*100;
+
+disp('%',p1,"%2nd order = ");
+
+p2=(V3/V1)*100;
+
+disp('%',p2,"%3nd order = ");
+
+THD=([sqrt((0.2^2)+(0.1^2)) ]/8)*100;
+
+disp('%',THD," Total harmonic distortion = ");
+
+
diff --git a/881/CH1/EX1.13/exa1_13.sce b/881/CH1/EX1.13/exa1_13.sce
new file mode 100755
index 000000000..affd43f36
--- /dev/null
+++ b/881/CH1/EX1.13/exa1_13.sce
@@ -0,0 +1,6 @@
+clc;
+//Example 1.13
+//Page no 26
+
+//Theory
+ 
diff --git a/881/CH1/EX1.14/exa1_14.sce b/881/CH1/EX1.14/exa1_14.sce
new file mode 100755
index 000000000..bac9edc78
--- /dev/null
+++ b/881/CH1/EX1.14/exa1_14.sce
@@ -0,0 +1,30 @@
+clc;
+//Example 1.14
+//Page no 27
+
+
+//solution:
+
+//(a)
+disp("Given B=100MHZ, S/N= 30dB = 1000");
+
+
+
+B=(100*(10^6));
+Sn=1000;
+
+I=3.32*B*log10(Sn+1);
+
+disp('bps',I,"I = ");
+
+//(b)
+
+disp("(b)If the SNR is increased by 4 times, the new")
+
+SNR=Sn*4;
+
+disp(SNR,"SNR = ");
+
+i=3.32*B*log10(SNR+1);
+
+disp('bps',i,"Therefore, the new information carrying capactiy is ")
diff --git a/881/CH1/EX1.15/exa1_15.sce b/881/CH1/EX1.15/exa1_15.sce
new file mode 100755
index 000000000..b5562ecfa
--- /dev/null
+++ b/881/CH1/EX1.15/exa1_15.sce
@@ -0,0 +1,16 @@
+clc; 
+//Example 1.15
+//Page no 28
+
+
+//solution
+
+v1=4;
+
+v2=0.005;
+
+
+
+sn=20*log10(v1/v2);
+
+disp('dB',sn,"S/N = ");
diff --git a/881/CH1/EX1.16/exa1_16.sce b/881/CH1/EX1.16/exa1_16.sce
new file mode 100755
index 000000000..24351d77b
--- /dev/null
+++ b/881/CH1/EX1.16/exa1_16.sce
@@ -0,0 +1,66 @@
+clc;
+//Example 1.16
+//Page no 30
+
+
+disp("Given: For a non ideal amplifier and the following parameters ");
+disp("Input signal power = 2 x 10^-10 W");
+disp("Input noise power = 2 x 10^-18 W");
+disp("Power Gain = 1 x 10^6");
+disp("Internal noise = 6 x 10^-12 W");
+
+//Solution
+
+ip=2*(10^-10);
+
+in=2*(10^-18);
+
+G=1*(10^6);
+
+Nd= 6*(10^-12);
+
+//(a)
+
+
+sn=(ip/in);
+
+SN=10*log10(round(sn));
+
+disp('dB',round(SN),"S/N = ");
+
+//(b)
+
+disp("(b)The output noise power is the sum of the internal noise and the amplified input noise, therefore ");
+
+No=(G*in)+Nd;
+
+disp('W',No,"Nout = ");
+
+disp("The output power is simply the product of the input power and the power gain. ");
+
+Po=G*ip;
+
+disp('W',Po,"Pout = ");
+
+disp("For the output signal and noise power levels calculated and substituting in equation 1-22, the output S/N is ");
+
+sn1=(Po/No);
+
+SN1=10*log10(round(sn1));
+
+disp('dB',round(SN1),"S/N = ");
+
+//(C)
+
+disp("(c)The noise factor is found by substituting the result from step (a) and (b) into equation 1-25  ");
+
+F=([round(sn)]/[round(sn1)]);
+
+disp(F,"F = ");
+
+disp("and the noise figure is calculated from equation 1-26(refer pgno 25) ");
+
+NF=10*log10(round(F));
+
+disp('dB',round(NF),"NF = ");
+
diff --git a/881/CH1/EX1.17/exa1_17.sce b/881/CH1/EX1.17/exa1_17.sce
new file mode 100755
index 000000000..4d647e1f6
--- /dev/null
+++ b/881/CH1/EX1.17/exa1_17.sce
@@ -0,0 +1,19 @@
+clc;
+//Example 1.17
+//Page no 31
+
+
+
+//solution
+
+
+
+ft=2+((2-1)/10)+([2-1]/100);//Noise factor
+
+disp(ft,"Ft = ")
+
+disp("Thus, the total noise figure is");
+
+nft=10*log10(ft);
+
+disp('dB',nft,"NFt = ")
diff --git a/881/CH1/EX1.18/exa1_18.sce b/881/CH1/EX1.18/exa1_18.sce
new file mode 100755
index 000000000..3a738dffb
--- /dev/null
+++ b/881/CH1/EX1.18/exa1_18.sce
@@ -0,0 +1,36 @@
+clc;
+//Example 1.18
+//Page no 33
+
+//solution
+
+//(a)
+
+Te=75;
+
+T=290;
+
+
+
+f=1+(Te/T);//Noise factor
+
+disp(f,"F = ");
+
+nf=10*log10(f);
+
+disp('dB',round(nf),"NF = ");
+
+//(b)
+
+disp("(b)Noise factor is found by rearranging equation 1-26 ");
+
+F=10^0.6;
+
+disp(round(F),"F = ");
+
+disp("substituting into equation 1-31 gives, ")
+
+te=T*(round(F)-1);
+
+disp('K',round(te),"Te = ");
+
diff --git a/881/CH1/EX1.3/exa1_3.sce b/881/CH1/EX1.3/exa1_3.sce
new file mode 100755
index 000000000..fe7a43343
--- /dev/null
+++ b/881/CH1/EX1.3/exa1_3.sce
@@ -0,0 +1,23 @@
+clc;
+//Example 1.3
+//Page no 8
+
+//Solution
+
+//(a)
+
+dBm1=10*log10([500*(10^-3)]/[1*(10^-3)]);
+
+disp('dBm',dBm1,"(a) 500 mW in dbm = ");
+
+//(b)
+
+dBm2=10*log10([10*(10^-9)]/[1*(10^-3)]);
+
+disp('dBm',dBm2,"(b) 10 nW in dbm = ");
+
+//(c)
+
+dBm3=10*log10([100*(10^-6)]/[1*(10^-3)]);
+
+disp('dBm',dBm3,"(c) 100 uW in dbm = ");
diff --git a/881/CH1/EX1.4/exa1_4.sce b/881/CH1/EX1.4/exa1_4.sce
new file mode 100755
index 000000000..1c6c89326
--- /dev/null
+++ b/881/CH1/EX1.4/exa1_4.sce
@@ -0,0 +1,29 @@
+clc;
+//Example 1.4
+//Page no 8
+
+//Solution
+
+//(a)
+
+p1=(10^-2.7)*(10^-3);
+
+disp('W', p1,"-27dBm in absolute power is, ");
+
+//(b)
+
+p2=(10^1.3)*(10^-3);
+
+disp('W', p2,"13dBm in absolute power is, ");
+
+//(c)
+
+p3=(10^4)*(10^-3);
+
+disp('W', p3,"40dBm in absolute power is, ");
+
+//(d)
+
+p4=(10^-5.3)*(10^-3);
+
+disp('W', p4,"-53dBm in absolute power is, ");
diff --git a/881/CH1/EX1.5/exa1_5.sce b/881/CH1/EX1.5/exa1_5.sce
new file mode 100755
index 000000000..242f27182
--- /dev/null
+++ b/881/CH1/EX1.5/exa1_5.sce
@@ -0,0 +1,60 @@
+clc;
+//Example 1.5
+//Page no 9
+
+
+
+pin=0.1*(10^-3);
+ap1=100;
+ap2=40;
+ap3=0.25;
+
+//Solution
+
+//(a)
+
+disp("(a)The input power in dBm ");
+
+Pin=10*log10(pin/0.001);
+
+disp('dBm',Pin,"The input power in dBm is, ");
+
+//(b)
+
+disp("(b)The output power is simply the input power multiplied by the three power gains: ");
+
+Pout=(pin)*ap1*ap2*ap3;
+
+Pout1=10*log10(Pout/0.001);
+
+disp('dBm',Pout1,'W',Pout,"The output power in watts and dBm is,");
+
+//(c)
+
+disp("(c)The decibel value for the three gains are determined by substituting into equation 1-3 (Pgno 4)");
+
+Ap1=10*log10(ap1);
+
+disp('dB',Ap1,"Ap1 = ");
+
+Ap2=10*log10(ap2);
+
+disp('dB',Ap2,"Ap2 = ");
+
+Ap3=10*log10(ap3);
+
+disp('dB',Ap3,"Ap3 = ");
+
+//(d)
+
+disp("(d)The overall power gain in dB (Apr) can be determined by simply adding the individual dB power gains, ");
+
+Apr=Ap1+Ap2+Ap3;
+
+disp('dB',Apr,"Apr = ");
+
+disp("The output power in dBm is the input power in dBm plus the sum of the gains of the three stages: ");
+
+Pout2=Pin+Apr;
+
+disp('dBm',Pout2,"Pout = ");
diff --git a/881/CH1/EX1.6/exa1_6.sce b/881/CH1/EX1.6/exa1_6.sce
new file mode 100755
index 000000000..2bd3863ba
--- /dev/null
+++ b/881/CH1/EX1.6/exa1_6.sce
@@ -0,0 +1,27 @@
+clc;
+//Example 1.6
+//Page no 10
+
+
+
+//Solution
+
+//(a)
+
+a=100*5
+
+disp(a,"(a)Overall gain of the system is the product of the individual gain, that is ");
+
+ap=10*log10(a);
+
+disp('dB',ap,"Thus, the overall gain in dB is,")
+
+//(b)
+
+b=[100*(10^-6)]*500;
+
+disp('W',b,"(b)Output power  = Input power to the system X Overall power gain, that is ")
+
+bp=10*log10(b/[1*(10^-3)]);
+
+disp('dBm', bp,"Therefore, Output power expressed in dB is, ");
diff --git a/881/CH1/EX1.7/exa1_7.sce b/881/CH1/EX1.7/exa1_7.sce
new file mode 100755
index 000000000..a8743455f
--- /dev/null
+++ b/881/CH1/EX1.7/exa1_7.sce
@@ -0,0 +1,8 @@
+clc;
+//Example 1.7
+//Page no 11
+//Solution
+
+a=21+2.5;
+
+disp('dBm',a,"The difference in the two power levels is 1 dB. Therefore, from table 1-5 , the combining term is 2.5 dB and the total power is, ");
diff --git a/881/CH1/EX1.8/exa1_8.sce b/881/CH1/EX1.8/exa1_8.sce
new file mode 100755
index 000000000..c0c2e8736
--- /dev/null
+++ b/881/CH1/EX1.8/exa1_8.sce
@@ -0,0 +1,38 @@
+clc;
+//Example 1.8
+//Page no 17
+
+//Solution
+
+//Refer to figure 1-5 on page no 17
+
+//(a)
+
+disp("(a)Medium Frequencies as per ITU-T range between 0.3MHz and 3MHz.");
+
+lm1=([3*(10^8)]/[0.3*(10^6)]);
+
+lm2=([3*(10^8)]/[3*(10^6)]);
+ 
+disp('m',lm2,'and','m',lm1,"Therefore, wavelengths range for MF are between ");
+
+//(b)
+
+disp("(b)Ultra High Frequencies as per ITU-T range between 300MHz and 3GHz.");
+
+lm3=([3*(10^8)]/[300*(10^6)]);
+
+lm4=([3*(10^8)]/[3*(10^9)]);
+
+disp('m',lm4,'and','m',lm3,"Therefore, wavelengths range for UHF are between ");
+
+//(c)
+
+disp("(c)Very High Frequencies as per ITU-T range between 30MHz and 300Mz.");
+
+lm5=([3*(10^8)]/[30*(10^6)]);
+
+lm6=([3*(10^8)]/[300*(10^6)]);
+ 
+disp('m',lm6,'and','m',lm5,"Therefore, wavelengths range for VHF are between ");
+
diff --git a/881/CH1/EX1.9/exa1_9.sce b/881/CH1/EX1.9/exa1_9.sce
new file mode 100755
index 000000000..315f304f7
--- /dev/null
+++ b/881/CH1/EX1.9/exa1_9.sce
@@ -0,0 +1,16 @@
+clc;
+//Example 1.9
+//Page no 20
+
+
+
+//Solution
+
+disp("The Shannon limit for capacity is determined by substituting into equation 1-12b");
+
+I=(3.32)*(2700)*log10(1+1000);
+
+disp('bps',I);
+
+
+