[英]BER result for QAM modulation Matlab
I'm trying to put a binary vector through a 16-QAM modulator, AWGN channel, demodulator and measure the BER in the end. 我试图通过16-QAM调制器,AWGN通道,解调器输入二进制矢量,并最终测量BER。 for some reason it keeps giving me BER=0, even after if I change the length of the vector.
由于某种原因,即使我更改了向量的长度,它也一直给我BER = 0。 (I'm supposed to do it with a Rayleigh channel later, but I'm not even there yet).
(我应该稍后使用Rayleigh频道进行此操作,但现在还没有)。
when I do the same but without a modulator I get BER!=0
which is fine. 当我这样做但没有调制器时,我得到
BER!=0
,这很好。
what am i missing here? 我在这里想念什么?
here's my code: 这是我的代码:
Sig = randi([0 1],1,1E5);
SigMod=qammod(Sig,16);
y=awgn(SigMod,50);
SigDemod=qamdemod(y,16);
z=SigDemod>0;
BER = biterr(Sig,z)
Try to see this example in Matlab: 尝试在Matlab中查看以下示例:
SNR = 3; 信噪比= 3; frameLen = 100;
frameLen = 100;
x = randi([0 1], frameLen, 1); x = randi([0 1],frameLen,1);
y = awgn(2*x-1, SNR); y = awgn(2 * x-1,SNR);
z = y > 0; z = y> 0;
biterr(x, z) biterr(x,z)
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