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// 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);
//------------------------------------------------------------------------------
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