erpdenb.m

此程序给出了不同情况的雷达距离测量仿真平台

% Effective Radiated Power Density
% ---------------------------------

clear;clc;clf;

% Generate ERP Density Vector

plmin=-4;plmax=6;
pl=plmin:.1:plmax;
pj=10.^pl;	% w/Mhz

% Radar and Target Parameters

Pt=1.5e5;	% w
Gt=10^(40/10);
Gr=10^(40/10);
rcs=3;		% sq m
wl=.1;		% m
Lr=10^(10/10)	;
Br=.08;		% Mhz
Gsl=10^(10/10);
snr=10^(13/10);
nf=5;		% db

% Jammer Parameters

Pj=2e4;		% w
Gj=10^(13/10);
Rj=3e5;		% m
Bj=4;		% Mhz
Lj=10^(7/10);

% Calculate Normalized Range in Jamming

pn=-144+nf;
N=10^(pn/10);

% Jammer ERP density at Radar

prj=(pj*Gj*Gsl*(wl)^2)/((4*pi*Rj)^2*Lj);

Ro=(Pt*Gt*Gr*rcs*(wl)^2/((4*pi)^3*snr*N*Br*Lr))^.25;
R=((Pt*Gt*Gr*rcs*(wl)^2)./((4*pi)^3*snr*(N+prj)*Br*Lr)).^.25;

% Plot Range Reduction versus ERP Power Density

semilogx(pj,R/Ro);grid;
ylabel('Range Reduction - %');
xlabel('ERP Spectral Density - w/Mhz');
title('JAMMER ERP REQUIREMENTS FOR SOJ AND SSJ');
end