vblast_decoder_linear_zf.asv

VBLAST 2发2收情况下的链路,可以实现误码率的计算

function output_data = VBLAST_decoder_linear_ZF(input_data)

num_Tx = 2;
CONS = [exp(j*pi/4); exp(j*3*pi/4); exp(j*5*pi/4); exp(j*7*pi/4)];
r_sig = input_data(;,1);
H_11 = input_data(:,3);
H_21 = input_data(:,4);
H_12 = input_data(:,5);
H_22 = input_data(:,6);

T = length(input_data(:,1));

for t = 1:T
    H = [H_11(t,1), H_21(t,1); H_12(t,1), H_22(t,1)];
    r = [r_sig(t,1); r_sig(t,2)];
    x_soft_eval = (inv(H' * H)) * H' * r;
    
    for q = 1:2
        for p = 1:4
            v_eval(p,q) = abs(x_soft_eval(q)-CONS(p));
        end
    end
    [val_min, index] = min(v_eval);
    x_eval(t,:) = CONS(index);
end

for l = 1:T/2
    for k = 1:num_Tx
        output_data_eval(l*2-1,k) = x_eval((l-1)*2+k,1);
        output_data_eval(l*2,k) = x_eval((l-1)*2+k,2);
    end
end
output_data = [output_data_eval(:,1); output_data_eval(:,2)];