symbals.m

对fdma和scfdma仿真性能的比较

% 1. Generate data
M = 4;
no_of_data_points = 16;
input = randsrc(1,no_of_data_points, 0:M-1);
% 2. Modulation
msg_tx = pskmod(input, M);
msg_tx1=fft(msg_tx);
ifdmamap=zeros(4*16);
ofdmpsk=zeros(4*16);
for ii=0:15
       ifdmamap(1+ii*4)=msg_tx1(ii+1);
       ofdmpsk(1+ii*4)=msg_tx(ii+1);
end
lfdmamap=zeros(4*16);
for ii=1:16
      lfdmamap(ii)=msg_tx1(ii);
end

% 4. 64-point IFFT
ifdmamap1=ifft(ifdmamap);
lfdmamap1=ifft(lfdmamap);
ofdmsymbals=ifft(ofdmpsk);
figure(1)
plot(abs(ofdmsymbals));grid on;xlabel('Data');ylabel('Amplitude');title('OFDMA symbals')
figure(3)
plot(abs(ifdmamap1));grid on;xlabel('Data');ylabel('Amplitude');title('IFDMA symbals')
figure(4)
plot(abs(lfdmamap1));grid on;xlabel('Data');ylabel('Amplitude');title('LFDMA symbals')