Adding data sequence to gaussian noise sequence

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Adding data sequence to gaussian noise sequence in MATLAB

Hi,
received sequence,r=s+v
s=+-1 is the data sequence and v is a gaussian noise sequnce.
Decision ckt :if r>0 then 1
r<0 then 0

Now i have to estimate BEP for SNR of 0 to 10 in 1dB increment.

Should i use awgn function for the gaussian noise sequence? Please let me know how to do this.
 
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you can use randn function for awgn noise
e.g. sqrt(variance)*(randn(1,1)-mean) is awgn noise.
 
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    ryder

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Pulkit Varshney said:
you can use randn function for awgn noise
e.g. sqrt(variance)*(randn(1,1)-mean) is awgn noise.
Click to expand...
thank you very much....
how can i generate the data sequence s=+-1? should i simply initialize an array like [1, -1,1,-1....]?
 

Pulkit Varshney said:
you can use randn function for awgn noise
e.g. sqrt(variance)*(randn(1,1)-mean) is awgn noise.
Click to expand...
i have to generate gaussian noise with snr increment from 0 to 10dB, with step size of 1dB.
i'm using variance=10^(-snr/10); in noise=sqrt(variance)*randn(size(x));
now i want the snr to be in dB.......any code to convert snr in magnitude to snr in dB.
i found this on mathworks.com "ydb=mag2db" .but this is to convert a single value. In my case i want incrementing snr in dB
 

its your consideration, matlab doesnt know what is db and what is not db
you have to treat that variable like it is in db
 
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