Finding variance and mean of an expression?

Cross Validated Asked on November 18, 2021

I want to compute the expectation and variance of the following expression.
$ Z|H_{i}=(|h_{i}|^{2}|s[n]|^{2}+|w[n]|^{2}+2mathcal{R}(h_{i}s[n]w^{*}[n]))$
where,$s[n]$ is PSK signal and $h$ is rayleigh distributed and $w[n]$ is AWGN and $mathcal{R}$ is real part. Any help in this regard will be highly appreciated

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