stbc_main.m

Branka Vucetic,Jinhong Yuan著的空时编码技术一书的源程序

%frame length = 130 symbols
fr_length=130;

%SNR upto 20 dBs
EbNo=[0:2:20];

%N, M: number of transmit and receive antennas

no_tx_antennas=2;
no_rx_antennas=1;
channel_model='Rayleigh';
Num=1000;
modulation='BPSK ';
[FER FER_uncoded SER SER_uncoded BER BER_uncoded]=stbc21(channel_model,fr_length,Num,no_tx_antennas,no_rx_antennas,modulation);
figure;
semilogy(EbNo,BER_uncoded,'--')
hold on
semilogy(EbNo,BER,'-*')
hold on
modulation='QPSK ';
no_tx_antennas=3;
no_rx_antennas=1;
[FER FER_uncoded SER SER_uncoded BER BER_uncoded]=stbc31(channel_model,fr_length,Num,no_tx_antennas,no_rx_antennas,modulation);
semilogy(EbNo,BER,'-o')
hold on 
no_tx_antennas=4;
no_rx_antennas=1;
[FER FER_uncoded SER SER_uncoded BER BER_uncoded]=stbc41(channel_model,fr_length,Num,no_tx_antennas,no_rx_antennas,modulation);
semilogy(EbNo,BER,'-<')
hold off
xlabel('SNR [dB]')
ylabel('BER')
axis([min(EbNo) max(EbNo) 1e-5 1e0])
legend('uncoded','2T x 1Rx','3T x 1Rx','4T x 1Rx',1)
grid on