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+// chapter 7 example 10
+//-----------------------------------------------------------------------------
+clc;
+clear;
+// given data
+RSSR        = 20;   // Rx signal strength in horizontal polarised antenna when rx RHCP
+
+// Calculations
+// When incident polarisation is circularly polarised and the antenna is linearly polarised,there is a ploarisation loss of 3dB
+ISS         = RSSR + 3;     
+// a
+// when the Rx polarisation is same as the antenna polarisation , the polarisation loss is zero
+RSS_HP      = ISS;      // rx signal strength for incident wave horizontally polarised
+// b
+// when the incident wave is vertically polarised ,the angle between the incident polarisation and the antenna polarisation is 90
+// polarisation loss = 20log(1/cos( φ))
+//                   = 20log(1/cos90) = ∞
+RSS_VP      = 0;        // rx signal strength for incident wave vertically polarised
+// c
+// When the incident wave is LHCP and the antenna polarisation is linear ,there will be a 3dB polarisation loss and the 
+// Rx signal strength therefore will be 20 dB only
+RSS_LHCP    = RSSR;      // rx signal strength for incident wave Left hand circularly polarised
+// d
+// The angle between the incident wave polarisation and the antenna polarisation is 60 degrees
+phi         = 60;                               // rx wave polarisation angle with horizontal
+PL          = 20*log10(1/cos(60*%pi/180));      // polarisation loss in dB
+RSS_Pangle  = ISS - PL;
+//output
+mprintf('Received signal strength if incident wave horizontally polarised = %d dB\n Received signal strength if incident wave vertically polarised = %d dB\n Received signal strength if incident wave Left hand circularly polarised is %d dB\n Received signal strength if Received wave polarisation making 60deg angle with horizontal is %3.0f dB',RSS_HP,RSS_VP,RSS_LHCP,RSS_Pangle);
+//--------------------------------------------------------------------------------
+
+