gmskpulse.m

qpsk的simulink仿真 可看ber性能等参数

close all
tt=-2.5:.01:2.5;
WT=0.2;
UpFreq=pi*sqrt(2*pi/log(2))*WT*(tt-.5);
LoFreq=pi*sqrt(2*pi/log(2))*WT*(tt+.5);
gt=0.5*(erfc(UpFreq)-erfc(LoFreq));
plot(tt,gt,'k');
grid
hold

WT=0.25;
UpFreq=pi*sqrt(2*pi/log(2))*WT*(tt-.5);
LoFreq=pi*sqrt(2*pi/log(2))*WT*(tt+.5);
gt=0.5*(erfc(UpFreq)-erfc(LoFreq));
plot(tt,gt,'b');

WT=0.3;
UpFreq=pi*sqrt(2*pi/log(2))*WT*(tt-.5);
LoFreq=pi*sqrt(2*pi/log(2))*WT*(tt+.5);
gt=0.5*(erfc(UpFreq)-erfc(LoFreq));
plot(tt,gt,'r');

legend('BT=0.2','BT=0.25','BT=0.3')