weak signal\anlyz.m ...........\cauchynoise.m ...........\foma.m ...........\gaussiannoise.m ...........\GSNR.mat ...........\iiddistr.m ...........\main.asv ...........\main.m ...........\mle_c.m ...........\mle_g.m ...........\smle_c.m ...........\smle_g.m weak signal