function[tfc1fc2fsk]=FSK（TXn）
if?nargin?????%第一、二個(gè)參數(shù)為載波頻率，第三個(gè)參數(shù)字基帶信號(hào)碼元個(gè)數(shù)！第四個(gè)參數(shù)碼元序列
????%當(dāng)碼元序列缺省時(shí)，默認(rèn)碼元序列為隨機(jī)序列
????%?2FSK——二進(jìn)制頻移鍵控
????[tsignal1signal2~]=baseband_Signal（T）;
????%生成基帶信號(hào)signal1，和基帶信號(hào)反碼signal2
else
????[tsignal1signal2~]=baseband_Signal（TXn）;
end
%載波信號(hào)Carrier_Signal1\Carrier_Signal2
fc1=1000000;
fc2=2000000;
Carrier_Signal1=cos（2*pi*fc1.*t）;
Carrier_Signal2=cos（2*pi*fc2.*t）;

%?subplot（211）plot（tCarrier_Signal1）;
%?axis（[00.0001-1.21.2]）;
%?xlabel（‘載波信號(hào)Carrier?Signal1‘）;
%?
%?subplot（212）plot（tCarrier_Signal2）;
%?axis（[00.0001-1.21.2]）;
%?xlabel（‘載波信號(hào)Carrier?Signal2‘）;
%?調(diào)制
F1=signal1.*Carrier_Signal1;%載波1*調(diào)制信號(hào)1
F2=signal2.*Carrier_Signal2;%載波2*調(diào)制信號(hào)2
figure?;
subplot（311）;plot（tF1）;
axis（[01-1.21.2]）;
xlabel（‘F1=signal1.*Carrier?Signal1‘）;

subplot（312）;plot（tF2）;
axis（[01-1.21.2]）;
xlabel（‘F1=signal2.*Carrier?Signal2‘）;

Modulated_Signal=F1+F2;
subplot（313）;plot（tModulated_Signal）;
axis（[01-1.21+0.2]）;
xlabel（‘2FSK信號(hào)‘）;
%鍵控法產(chǎn)生的信號(hào)在相鄰碼元之間相位不一定連續(xù)
%??a=length（t）;
%加噪
%?nosie=rand（1a）;
fsk=awgn（Modulated_Signal30）;?
%?fsk=Modulated_Signal+nosie;
subplot（414）;plot（tfsk）;
axis（[01-1.21+0.2]）;
xlabel（‘加噪聲后信號(hào)‘）;

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----
?????文件????????1364??2019-01-05?14:42??FSK\FSK.m
?????文件????????2550??2019-01-05?14:55??FSK\FSK_Demodulation.m
?????目錄???????????0??2019-04-14?10:52??FSK\