radar.m

Electronic Communication Systems的Matlab源码

function parabolic(eff,freq,d_min,d_max)
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% Computes received power over a range of target distances
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% eff = Efficieny
% freq = frequency in hertz
% r_min = Minimum dish diameter
% r_max = Maximum dish diameter
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% example fucntion call
% parabolic(0.6,4e9,1.8,4)
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% speed of light
c= 3e8;

Pt=input('Enter the Transmitter power in watts  ');
G=input('Enter the antenna gain  ');
f=input('Enter the Transmitter frequency  ');
sigma=input('Enter the radar cross-section of the target in square meters  ');
r_min=input('Enter the minimum range in meters  ');
r_max=input('Enter the maximum range in meters  ');

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r_step=(r_max-r_min)/100;
r=r_min:r_step:r_max;
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% Compute gain in received power
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Pr = Pt*sigma*((c*G/f).^2)./((4*pi).^3)./(r.^4);

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clf
figure(1)

plot(r,Pr);
title('Receiver power over a range of target distances')
ylabel('Receiver Power')
xlabel('Range in meters')
grid
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