upsample.m

OFDM系统仿真

function output=upsample(input)
tx_data = kron(input, ones(1,4));
f = [0 0.25*(200/256) 0.35*(200/256) 1];
amp = [1 1 0 0];
b = remez(80, f, amp);
%[b, aa] = butter(18, 1/4);
output = conv(b, tx_data);   % filter
%tx_data = filter(b, aa, tx_data);