for?snr=0:1:16
???for?frame=1:600?
msg=randint（2048116）;%?the?elements?of?msg?is?between?0-15?
M=16;
qam_signal=modulate（modem.qammod（M）msg）;%mapping

transmit_signal=sqrt（2048）*ifft（qam_signal2048）;

sd=sqrt（1.25*10^（-0.1*snr））;
%snr=10^（m/10）;?Eb=10;N0=Eb/snr;sigma=sqrt（N0）;?another?method



noise=zeros（12048）;
for?i=1:2048
noise（i）=sd*randn（1）+j*sd*randn（1）;
end

for?i=1:2048
????receive_signal（i）=transmit_signal（i）+noise（i）;
end
%receive_signal=transmit_signal+noise;
%receive_signal=receive_signal‘;
signal=（1/sqrt（2048））*fft（receive_signal2048）;

%a=real（signal）;
%b=imag（signal）;
%axis（[-5?5?-5?5]）;
%plot（ab‘*‘）;
%title（‘16-QAM?in?awgn?channel‘）
data=qamdemod（signal16）;
[number（frame）ratio]=symerr（msgdata‘）;
???end
???ber（snr+1）=sum（number）/（2048*600）;
end
x=0:16;
axis（[0?16?10^-6?1]）;
semilogy（xber）;
title（‘OFDM?BER?performance?in?AWGN?channel‘）;
xlabel（‘SNR‘）;
ylabel（‘BER‘）
grid;

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件????????913??2010-01-07?06:45??OFDM系統(tǒng)\awgn?channel\awgn.m

?????文件?????698934??2010-01-06?07:12??OFDM系統(tǒng)\curves?and?plots\awgn.bmp

?????文件?????709014??2010-01-06?07:10??OFDM系統(tǒng)\curves?and?plots\constellation_awgn.bmp

?????文件?????705654??2010-01-06?07:47??OFDM系統(tǒng)\curves?and?plots\constellation_perfect?channel.bmp

?????文件?????698950??2010-01-06?07:11??OFDM系統(tǒng)\curves?and?plots\constellation_pilot.bmp

?????文件????2291134??2010-01-08?05:59??OFDM系統(tǒng)\curves?and?plots\eye_awgn.bmp

?????文件????2120054??2010-01-08?05:33??OFDM系統(tǒng)\curves?and?plots\eye_perfect?channel.bmp

?????文件????2227158??2010-01-08?05:53??OFDM系統(tǒng)\curves?and?plots\eye_pilot.bmp

?????文件?????709014??2010-01-06?07:09??OFDM系統(tǒng)\curves?and?plots\perfect?channel?knowledge.bmp

?????文件?????695610??2010-01-06?07:09??OFDM系統(tǒng)\curves?and?plots\pilot.bmp

?????文件?????703950??2010-01-07?05:11??OFDM系統(tǒng)\curves?and?plots\pilot—comparison.bmp

?????文件?????698934??2010-01-07?04:45??OFDM系統(tǒng)\curves?and?plots\two?schemes?comparision.bmp

?????文件?????399360??2010-01-08?06:39??OFDM系統(tǒng)\ofdm.doc

?????文件???????1224??2009-11-04?13:01??OFDM系統(tǒng)\perfect?channel?knowledge\constellation.m

?????文件????????524??2009-12-31?02:56??OFDM系統(tǒng)\perfect?channel?knowledge\demodulation.m

?????文件???????2220??2010-01-08?07:26??OFDM系統(tǒng)\perfect?channel?knowledge\qam_perfect.asv

?????文件???????2220??2010-01-08?07:26??OFDM系統(tǒng)\perfect?channel?knowledge\qam_perfect.m

?????文件????????531??2009-12-31?02:45??OFDM系統(tǒng)\perfect?channel?knowledge\transmission.m

?????文件???????1224??2009-12-31?03:40??OFDM系統(tǒng)\pilot?estimation\constellation.m

?????文件????????516??2009-12-31?22:06??OFDM系統(tǒng)\pilot?estimation\demodulation.m

?????文件???????2567??2019-03-28?17:03??OFDM系統(tǒng)\pilot?estimation\qam_pilot.m

?????文件????????531??2009-12-31?03:40??OFDM系統(tǒng)\pilot?estimation\transmission.m

?????目錄??????????0??2010-02-08?05:40??OFDM系統(tǒng)\awgn?channel

?????目錄??????????0??2010-02-08?05:40??OFDM系統(tǒng)\curves?and?plots

?????目錄??????????0??2010-02-08?05:40??OFDM系統(tǒng)\perfect?channel?knowledge

?????目錄??????????0??2019-03-28?17:22??OFDM系統(tǒng)\pilot?estimation

?????目錄??????????0??2019-03-28?17:22??OFDM系統(tǒng)

-----------?---------??----------?-----??----

?????????????12670236????????????????????27



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