sefade.m

来自「有关于OFDM系统的在AWGN信道下(BPSK调制)的信噪比分析.」· M 代码 · 共 30 行

% This function generates frequency selecting fading


function[iout,qout,ramp,rcos,rsin]=sefade(idata,qdata,itau,dlvl,th,n0,itn,n1,nsamp,tstp,fd,flat)



iout = zeros(1,nsamp);
qout = zeros(1,nsamp);

total_attn = sum(10 .^( -1.0 .* dlvl ./ 10.0));

for k = 1 : n1 

	atts = 10.^( -0.05 .* dlvl(k));

	if dlvl(k) >= 40.0 
	       atts = 0.0;
	end

	theta = th(k) .* pi ./ 180.0;	

	[itmp,qtmp] = delay ( idata , qdata , nsamp , itau(k));
	[itmp3,qtmp3,ramp,rcos,rsin] = fade (itmp,qtmp,nsamp,tstp,fd,n0(k),itn(k),flat);
	
  iout = iout + atts .* itmp3 ./ sqrt(total_attn);
  qout = qout + atts .* qtmp3 ./ sqrt(total_attn);

end