雷达信号积累改善因子matlab仿真

clear all;
clc;

pfa1=1e-3;
pfa2=1e-6;
pfa3=1e-9;
pfa4=1e-12;
pfa5=1e-14;

pd1=0.5;
pd2=0.6;
pd3=0.7;
pd4=0.8;
pd5=0.9;

index=0;

for np=1:1:10e2
    index=index+1;
    I1（index）=improv_fac（nppfa1pd1）;
    I2（index）=improv_fac（nppfa2pd2）;
    I3（index）=improv_fac（nppfa3pd3）;
    I4（index）=improv_fac（n