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+//Chapter-11 example 1
+//=============================================================================
+clc;
+clear;
+//Given data
+F  = 10*10^9;   //radar operating frequency in Hz
+Vo = 3*10^8;    //vel in m/s;
+G  = 20;        //antenna gain in dBi;
+R  = 20*10^3;   //distance of radar reflected signal from target
+Pt = 10*10^3     //Tx power in watts
+CS = 10;        //cross sectional area in m^2
+// Calculations
+Gain = 10^(G/10)    //G = 10log(Gain) ==>gain - antilog(20/10);
+Gr = Gain;  //gain of tx antenna and Rx antenna
+Gt = Gain
+lamda = Vo/F
+Pr= (lamda*lamda*Pt*Gt*Gr*CS)/((4*4*4*%pi*%pi*%pi)*(R^4))//received power in watts
+
+// Output
+mprintf('Received signal Power is %g',Pr);
+mprintf('\n Note : Calculation error in Textbook');
+
+
+