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Diffstat (limited to '3446/CH5/EX5.5/Ex5_5.sce')
| -rw-r--r-- | 3446/CH5/EX5.5/Ex5_5.sce | 128 |
1 files changed, 128 insertions, 0 deletions
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);
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