ofdm_tx1.m

程序是MIMO-OFDM系统下

function [pilot_position, Tx_data]=OFDM_tx(pilot,pilot_num,data,data_num,dK,ant_num,sub_num,pre_ratio,FRAME_NUM)
pilot_position=zeros(1,pilot_num);
for k=1:1:pilot_num
    pilot_position(k)=1-dK+dK*k;
end


Tx_data=zeros(ant_num,sub_num*(1+pre_ratio)*FRAME_NUM);
for fn=1:1:FRAME_NUM
temp_signal=zeros(ant_num,sub_num);    
temp_signal1=zeros(ant_num,sub_num);
    
for am=1:1:ant_num
    temp_data=1;
    temp_pilot=1;
    for k=1:1:sub_num
        if rem(k+dK-1,dK)==0
            temp_signal(am,k)=pilot(am,temp_pilot+(fn-1)*pilot_num);
            temp_pilot=temp_pilot+1;
        else
            temp_signal(am,k)=data(am,temp_data+(fn-1)*data_num);
            temp_data=temp_data+1;
        end
    end
    temp_signal1(am,:)=sqrt(sub_num)*ifft(temp_signal(am,:),sub_num);
end

Tx_data(:,(sub_num*(1+pre_ratio)*(fn-1)+1):sub_num*(1+pre_ratio)*fn)=[temp_signal1(:,sub_num*(1-pre_ratio)+1:sub_num)  temp_signal1];

end