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plz explain zero mean

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dhruva

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hi can anyone tell me what is meant by zero mean if i have zero mean of a guassian random variable
noise has zero mean??? but variance N0/2
also explain this with help of a diagram how zero mean value can be represented in pdf of gaussian r p
 

mean = Average
Zero mean that means Average of a random variable is Zero
 

If a signal's mean value is zero then the DC component is zero
 

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