How to choose Threshold when Add AWGN to signal

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irfan
irfan 2016 年 8 月 17 日
コメント済み: irfan 2016 年 8 月 18 日
Hello, sir, I am adding AWGN noise to my Random signal but when I add it I also need to change my threshold value for the signal so I am facing problem in the threshold that how to choose the threshold for a signal when to add AWGN noise any other method if you know can you suggest for me .

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Image Analyst
Image Analyst 2016 年 8 月 17 日
You can add Gaussian noise like this
noisyVec = vec + amplitude * randn(size(vec));
where vec is your other random signal.
I have no idea what you're talking about regarding a threshold. You say you need to "change my threshold value for the signal" -- well, what is the existing threshold value and how did you get it originally? Is it in a variable? WHY do you need to change it? Changing it is not necessary as far as I can see to add random numbers to a vector.
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irfan
irfan 2016 年 8 月 18 日
my signal is in sparse so I am selecting the threshold that if there is signal less than the threshold so it gives me to signal recovery

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