initial commit / add all books

5 files changed, 250 insertions, 0 deletions

diff --git a/3446/CH5/EX5.1/Ex5_1.sce b/3446/CH5/EX5.1/Ex5_1.sce
new file mode 100644
index 000000000..7053a8d1b
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@@ -0,0 +1,29 @@
+// Exa 5.1

+// To Calculate 

+// A) The system capacity if the cluster size, N (reuse factor), is 4 and 

+// B) The system capacity if the cluster size is 7.

+// C) How many times would a cluster of size 4 have to be replicated to cover the entire cellular area? 

+// D) Does decreasing the reuse factor N increase the system capacity?

+

+clc;

+clear all;

+

+ToCH=960;// Total available channels

+Cellarea=6; //in km^2

+Covarea=2000;//in km^2

+N1=4;  // Cluster Size

+N2=7;  //Cluster Size

+

+//solution

+Area1=N1*Cellarea;//for N=4

+Area2=N2*Cellarea;//For N=7

+No_of_clusters1=round(Covarea/Area1);

+No_of_clusters2=round(Covarea/Area2);

+No_of_CH1=ToCH/N1;    // No of channels with cluster size 4

+No_of_CH2=ToCH/N2;    // No of channels with cluster size 7

+SysCap1=No_of_clusters1*ToCH;

+SysCap2=No_of_clusters2*ToCH;

+printf(' System Capacity with cluster size 4 is %d channels \n ',SysCap1);

+printf(' Number of clusters for covering total area with N equals 4 are %d \n ',No_of_clusters1);

+printf(' System Capacity with cluster size 7 is %d channels \n',SysCap2);

+disp("      It is evident when we decrease the value of N from 7 to 4, we increase the system capacity from 46080 to 79680 channels. Thus, decreasing the reuse factor (N) increases the system capacity.")

diff --git a/3446/CH5/EX5.2/Ex5_2.sce b/3446/CH5/EX5.2/Ex5_2.sce
new file mode 100644
index 000000000..dba579859
--- /dev/null
+++ b/3446/CH5/EX5.2/Ex5_2.sce
@@ -0,0 +1,18 @@
+// Exa 5.2

+// To calculate reuse factor for AMP and GSM systems.

+

+clc;

+clear all;

+

+S_IAMP=18;// S/I ratio in dB

+S_IGSM=12;// S/I ratio in dB

+PPL=4; // propogation path loss coefficient

+

+//solution

+// Using Equation 5.16 on page no 132, we get

+N_AMP=(1/3)*((6*10^(0.1*S_IAMP))^(2/PPL));//reuse factor for AMPS

+  

+N_GSM=(1/3)*((6*10^(0.1*S_IGSM))^(2/PPL));//reuse factor for GSM

+

+printf('Reuse Factor for AMP system is N = %f = approx %d \n',N_AMP,N_AMP+1);

+printf(' Reuse Factor for GSM system is N = %f = approx %d \n',N_GSM,N_GSM+1);

diff --git a/3446/CH5/EX5.3/Ex5_3.sce b/3446/CH5/EX5.3/Ex5_3.sce
new file mode 100644
index 000000000..00a87cb1a
--- /dev/null
+++ b/3446/CH5/EX5.3/Ex5_3.sce
@@ -0,0 +1,49 @@
+// Exa 5.3

+// To calculate

+// A) The number of calls per cell site per hour (i.e., call capacity of cell).

+// B) Mean S/I ratio for cell reuse factor equal to 4, 7 and 12.

+

+clc;

+clear all;

+

+VCH=395;//Total voice channels

+CallHT=120;//average call holding time in sec

+Blocking=0.02;// 2%

+PPL=4;  //propogation path loss coefficient

+N1=4      //reuse factor

+N2=7;     //reuse factor

+N3=12;    //reuse factor

+

+//solution

+No_of_VCH1=VCH/N1;  //for reuse factor N1

+No_of_VCH2=VCH/N2;  //for reuse factor N2

+No_of_VCH3=VCH/N3;  //for reuse factor N3

+printf('\nNO of voice channels for N=4 are %d',round(No_of_VCH1));

+printf('\nNO of voice channels for N=7 are %d',round(No_of_VCH2));

+printf('\nNO of voice channels for N=12 are %d\n',round(No_of_VCH3));

+disp("Using the Erlang-B traffic table (see Appendix A) for 99 channels with 2% blocking, we find a traffic load of 87 Erlangs.");

+TrafLoad1=87.004;

+Carryload1=(1-Blocking)*TrafLoad1;

+disp("Using the Erlang-B traffic table (see Appendix A) for 56 channels with 2% blocking, we find a traffic load of 45.88 Erlangs.");

+TrafLoad2=45.877;

+Carryload2=(1-Blocking)*TrafLoad2;

+disp("Using the Erlang-B traffic table (see Appendix A) for 33 channels with 2% blocking, we find a traffic load of 24.6 Erlangs.");

+TrafLoad3=24.629;

+Carryload3=(1-Blocking)*TrafLoad3;

+// To find cell capacity

+Ncall1=Carryload1*3600/CallHT;//Calls per hour per cell 

+Ncall2=Carryload2*3600/CallHT;

+Ncall3=Carryload3*3600/CallHT;

+printf('\ncalls per hour per cell for N=4 are %d',round(Ncall1));

+printf('\ncalls per hour per cell for N=7 are %d',round(Ncall2));

+printf('\ncalls per hour per cell for N=12 are %d  \n',Ncall3);

+// To find S BY I

+// N=(1/3)[6*(S/I)]^(2/PPL)

+S_I1=10*(PPL/2)*(log10(N1)-log10(1/3)-(2/PPL)*log10(6));//Mean S/I (dB)

+

+S_I2=10*(PPL/2)*(log10(N2)-log10(1/3)-(2/PPL)*log10(6));

+S_I3=10*(PPL/2)*(log10(N3)-log10(1/3)-(2/PPL)*log10(6));

+

+printf('\nMean S/I(dB) for N=4 is %.1f',S_I1);

+printf('\nMean S/I(dB) for N=7 is %.1f',S_I2);

+printf('\nMean S/I(dB) for N=12 is %.1f',S_I3);

diff --git a/3446/CH5/EX5.4/Ex5_4.sce b/3446/CH5/EX5.4/Ex5_4.sce
new file mode 100644
index 000000000..93e22d03f
--- /dev/null
+++ b/3446/CH5/EX5.4/Ex5_4.sce
@@ -0,0 +1,26 @@
+// Exa 5.4

+// To find the number of calls per hour per cell site.

+

+clc;

+clear all;

+

+spectrum=12.5*10^6; //in Hz

+CHBW=200*10^3;//in Hz

+N=4;//reuse factor

+Blocking=0.02; // 2%

+callHT=120;//average call holding time in sec

+PPL=4;//propogation path loss coefficient

+CntrlCH=3; //No of control channels

+Ts=8; // No of voice channels per RF channel

+

+//solution

+No_ofVCH=((spectrum*Ts)/(CHBW*N))-CntrlCH;

+printf('\n No of voice channels for N=4 are %d',No_ofVCH);

+disp("");

+disp("Using the Erlang-B traffic table for 122 channels with 2% blocking,we find a traffic load of 110 Erlangs. ");

+TrafLoad=110;

+CarryLoad=(1-Blocking)*TrafLoad;

+Ncall=CarryLoad*3600/callHT;

+printf('\n Calls per hour per cell for N=4 are %d calls/hour/cell \n ',round(Ncall));

+S_I=10*(PPL/2)*(log10(N)-log10(1/3)-(2/PPL)*log10(6));

+printf('\n Mean S/I(dB) for N=4 is %.1f dB \n ',S_I);

diff --git a/3446/CH5/EX5.5/Ex5_5.sce b/3446/CH5/EX5.5/Ex5_5.sce
new file mode 100644
index 000000000..e2cb30421
--- /dev/null
+++ b/3446/CH5/EX5.5/Ex5_5.sce
@@ -0,0 +1,128 @@
+// Exa 5.5

+// To Calculate: 

+// a) The calls per hour per cell site 

+// b) The mean S/I ratio 

+// c) The spectral efficiency in Erlang/km2/MHz 

+// for Reuse ratio =4,7,12 and for omnidirectional, 120 degree and 60 degree antenna systems.

+

+clc;

+clear all;

+

+VCH=395;//Total allocated voice channels

+CHBW=30; // in kHz

+Spectrum=12.5;  // in MHz

+CallHT=120; //Average call holding time in sec

+Blocking=0.02; // 2%

+PL=40;  //slope of path loss in dBperdecade

+

+//solution

+disp("We consider only the first tier interferers and neglect the effects of cochannel interference from the second and other higher tiers.");

+//FOR 120degree sectorization

+//N=4

+VCH11=(VCH/(4*3));

+OffLoad11=24.629;  //  Offered traffic load per sector from Erlang-B table(Appendix A)

+Load_site11=3*OffLoad11;

+CarLoad11=(1-Blocking)*Load_site11;

+Calls_hr_site11=CarLoad11*3600/CallHT;

+R11=sqrt(CarLoad11/0.52);

+Seff11=CarLoad11/(2.6*Spectrum*R11^2);

+S_I11=PL*log10(sqrt(3*4))-10*log10(2);

+//N=7

+VCH12=(VCH/(3*7));

+OffLoad12=12.341;  //  Offered traffic load per sector from Erlang-B table(Appendix A)

+Load_site12=3*OffLoad12;

+CarLoad12=(1-Blocking)*Load_site12;

+Calls_hr_site12=CarLoad12*3600/CallHT;

+R12=sqrt(CarLoad12/0.52);

+Seff12=CarLoad12/(2.6*Spectrum*R12^2);

+S_I12=PL*log10(sqrt(3*7))-10*log10(2);

+//N=12

+VCH13=VCH/(3*12);

+OffLoad13=5.842;  //  Offered traffic load per sector from Erlang-B table(Appendix A)

+Load_site13=3*OffLoad13;

+CarLoad13=(1-Blocking)*Load_site13;

+Calls_hr_site13=CarLoad13*3600/CallHT;

+R13=sqrt(CarLoad13/0.52);

+Seff13=CarLoad13/(2.6*Spectrum*R13^2);

+S_I13=PL*log10(sqrt(3*12))-10*log10(2);

+//For omnidirectional 

+//N=4

+VCH21=VCH/(4);

+OffLoad21=87.004;  //  Offered traffic load per sector from Erlang-B table(Appendix A)

+Load_site21=OffLoad21;

+CarLoad21=(1-Blocking)*Load_site21;

+Calls_hr_site21=CarLoad21*3600/CallHT;

+R21=sqrt(CarLoad21/0.52);

+Seff21=CarLoad21/(2.6*Spectrum*R21^2);

+S_I21=PL*log10(sqrt(3*4))-10*log10(6);

+//N=7

+VCH22=VCH/(7);

+OffLoad22=46.817;  //  Offered traffic load per sector from Erlang-B table(Appendix A)

+Load_site22=OffLoad22;

+CarLoad22=(1-Blocking)*Load_site22;

+Calls_hr_site22=CarLoad22*3600/CallHT;

+R22=sqrt(CarLoad22/0.52);

+Seff22=CarLoad22/(2.6*Spectrum*R22^2);

+S_I22=PL*log10(sqrt(3*7))-10*log10(6);

+//N=12

+VCH23=VCH/(12);

+OffLoad23=24.629;  //  Offered traffic load per sector from Erlang-B table(Appendix A)

+Load_site23=OffLoad23;

+CarLoad23=(1-Blocking)*Load_site23;

+Calls_hr_site23=CarLoad23*3600/CallHT;

+R23=sqrt(CarLoad23/0.52);

+Seff23=CarLoad23/(2.6*Spectrum*R23^2);

+S_I23=PL*log10(sqrt(3*12))-10*log10(6);

+// For 60degree Sectorization

+//N=3

+VCH31=VCH/(6*3);

+OffLoad31=14.902;  //  Offered traffic load per sector from Erlang-B table(Appendix A)

+Load_site31=6*OffLoad31;

+CarLoad31=(1-Blocking)*Load_site31;

+Calls_hr_site31=CarLoad31*3600/CallHT;

+R31=sqrt(CarLoad31/0.52);

+Seff31=CarLoad31/(2.6*Spectrum*R31^2);

+S_I31=PL*log10(sqrt(3*3))-10*log10(1);

+//N=4

+VCH32=VCH/(6*4);

+OffLoad32=10.656;  //  Offered traffic load per sector from Erlang-B table(Appendix A)

+Load_site32=6*OffLoad32;

+CarLoad32=(1-Blocking)*Load_site32;

+Calls_hr_site32=CarLoad32*3600/CallHT;

+R32=sqrt(CarLoad32/0.52);

+Seff32=CarLoad32/(2.6*Spectrum*R32^2);

+S_I32=PL*log10(sqrt(3*4))-10*log10(1);

+//N=7

+VCH33=VCH/(6*7);

+OffLoad33=5.084;  //  Offered traffic load per sector from Erlang-B table(Appendix A)

+Load_site33=6*OffLoad33;

+CarLoad33=(1-Blocking)*Load_site33;

+Calls_hr_site33=CarLoad33*3600/CallHT;

+R33=sqrt(CarLoad33/0.52);

+Seff33=CarLoad33/(2.6*Spectrum*R33^2);

+S_I33=PL*log10(sqrt(3*7))-10*log10(1);

+//N=12

+VCH34=VCH/(6*12);

+OffLoad34=2.227;  //  Offered traffic load per sector from Erlang-B table(Appendix A)

+Load_site34=6*OffLoad34;

+CarLoad34=(1-Blocking)*Load_site34;

+Calls_hr_site34=CarLoad34*3600/CallHT;

+R34=sqrt(CarLoad34/0.52);

+Seff34=CarLoad34/(2.6*Spectrum*R34^2);

+S_I34=PL*log10(sqrt(3*12))-10*log10(1);

+

+printf('For Omnidirectional    Calls_per_hour_per_cellsite      Mean S_I ratio      SpecrtalEfficiency\n')

+printf('For N=4                         %d                           %.1f          %.3f\n',Calls_hr_site21,S_I21,Seff21);

+printf('For N=7                         %d                           %.1f          %.3f\n',Calls_hr_site22,S_I22,Seff22);

+printf('For N=12                        %d                            %.1f          %.3f\n',Calls_hr_site23,S_I23,Seff23);

+

+printf('For 120deg sector    Calls_per_hour_per_cellsite      Mean S_I ratio      SpecrtalEfficiency\n')

+printf('For N=4                         %d                           %.1f          %.3f\n',Calls_hr_site11,S_I11,Seff11);

+printf('For N=7                         %d                           %.1f          %.3f\n',Calls_hr_site12,S_I12,Seff12);

+printf('For N=12                        %d                            %.1f          %.3f\n',Calls_hr_site13,S_I13,Seff13);

+

+printf('For 60 deg Sector    Calls_per_hour_per_cellsite        Mean S_I ratio      SpecrtalEfficiency\n')

+printf('For N=3                         %d                           %.1f          %.3f\n',Calls_hr_site31,S_I31,Seff31);

+printf('For N=4                         %d                           %.1f          %.3f\n',Calls_hr_site32,S_I32,Seff32);

+printf('For N=7                          %d                           %.1f          %.3f\n',Calls_hr_site33,S_I33,Seff33);

+printf('For N=12                         %d                           %.1f          %.3f\n',Calls_hr_site34,S_I34,Seff34);