pilot_generator.asv

OFDM的在瑞利信道下的与单载波信号的识别算法

function pilot_sym = pilot_generator(pilot_len)

%%%% Generate the pilot symbols, see IEEE802.11a stand. page23 and page16 %%%%
D = ones(1,7);
for i = 1:128
    pilot_sym(i) = sin(D(4) * pi/2 + D(7) * pi/2);
    for j = 7:-1:2
        D(j) = D(j-1);
    end
    D(1) = pilot_sym(i);
    if D(1)==1
        pilot_sym(i) = -1;
    else
        pilot_sym(i) = 1;
    end
end
pilot_sym = reshape(pilot_sym,4,128/4);
pilot_sym = pilot_sym';