1 files changed, 25 insertions, 0 deletions
diff --git a/2219/CH9/EX9.3/Ex9_3.sce b/2219/CH9/EX9.3/Ex9_3.sce
new file mode 100755
index 000000000..47a0c422f
--- /dev/null
+++ b/2219/CH9/EX9.3/Ex9_3.sce
@@ -0,0 +1,25 @@
+// Chapter 9 example 3
+//------------------------------------------------------------------------------
+clc;
+clear;
+// Given Data
+f       = 10*10^9;      // radar Tx frequency
+PRF     = 2000;         // Pulse repetitive frequency in Hz
+Vr      = 0.5;          // radial vel in Mach
+c       = 3*10^8;       // velocity of EM waves in m/s
+vs      = 330;          // velocity of sound in m/s
+
+// Calculations
+lamda           = c/f;          // wavelength in m
+max_unamb_fd    = PRF/2;        // maximum unambiguous doppler shift
+Vrunamb         = (lamda*max_unamb_fd)/2; // doppler shift
+Vaircraft       = 0.5*vs;       // Converting from Mach to m/s
+fd_desired      = (2*Vaircraft)/lamda;
+PRF_desired     = 2*fd_desired; // desired PRF
+
+// Output
+if  Vrunamb < Vaircraft then
+    mprintf('The radar is not capable of determining unambiguously the velocity of the approaching aircraft\n');
+end
+mprintf(' Desired Pulse Repetition Rate = %d Khz',PRF_desired/1000);
+//------------------------------------------------------------------------------