lowpass_filter.m

通过图形实现OFMD的图像仿真

function [channel_post_lp]=lowpass_filter(channel_estimation)

frame_symbol=68;
row_begin=3;
row_end=frame_symbol-3;
para=1705;
fft_length=2048;
gi=1/8;
gi_length=gi*fft_length;
channel_post_lp=zeros(frame_symbol, para);

for count_sn=row_begin:row_end
    channel_response=ifft(channel_estimation(count_sn,:));
    channel_response(gi_length+1:para)=zeros(1, para-gi_length);
    channel_post_lp(count_sn,:)=fft(channel_response);
end