Graphics Programs Reference
In-Depth Information
argnumC = 10*log10(pt*g*g*lambda*lambda*tau .* sigmac);
argdem = 10*log10(((4*pi)^3)*k*T0*Lt*F .*(range_m).^4);
CNR = argnumC - argdem;
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
if (size(range,2) ==1)
fprintf('Cluuter_to_Noise_ratio='); CNR
else
figure(2)
plot(range, CNR,'r')
grid
xlabel('Slant Range in Km')
ylabel('CNR in dB')
end
Listing 6.2. MATLAB Program Ðmyradar_visit6.mÑ
clear all
close all
thetaA= 1.33; % antenna azimuth beamwidth in degrees
thetaE = 11; % antenna elevation beamwidth in degrees
hr = 5.; % radar height to center of antenna (phase reference) in meters
htm = 2000.; % target (missile) high in meters
hta = 10000.; % target (aircraft) high in meters
SL = -20; % radar rms sidelobes in dB
sigma0 = -15; % clutter backscatter coefficient
b = 1.0e6; %1-MHz bandwidth
t0 = 290; % noise temperature 290 degrees Kelvin
f0 = 3e9; % 3 GHz center frequency
pt = 114.6; % radar peak power in KW
f = 6; % 6 dB noise figure
l = 8; % 8 dB radar losses
range = linspace(25,120,500); % radar slant range 25 to 120 Km, 500 points
% calculate the clutter RCS and the associated CNR for both targets
[sigmaCa,CNRa] = clutter_rcs(sigma0, thetaE, thetaA, SL, range, hr, hta, pt,
f0, b, t0, f, l, 2);
[sigmaCm,CNRm] = clutter_rcs(sigma0, thetaE, thetaA, L, range, hr, htm, pt,
f0, b, t0, f, l, 2);
close all
%%%%%%%%%%%%%%%%%%%%%%%%
np = 4;
pfa = 1e-7;
pdm = 0.99945;
pda = 0.99812;
% calculate the improvement factor
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