initial commit / add all books

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+// 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);