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## Main Question or Discussion Point

Hi,

Let y = x + z, where x and z are mutually independent RVs. Also, z is a complex gaussian RV with zero mean and variance sigma^2.

My question is as follows:

For x = y - z, what is the variance of (-z) ?

Any help could be useful.

Thanks in advance.

Let y = x + z, where x and z are mutually independent RVs. Also, z is a complex gaussian RV with zero mean and variance sigma^2.

My question is as follows:

For x = y - z, what is the variance of (-z) ?

Any help could be useful.

Thanks in advance.