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Help: How to calculate system SNR using matlab?

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phoenix_cyp

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Hi guys,
I met a problem in adaptive predictor system performance testing.
I have to calculate this predictor system's input and output SNR.

Below is some specifics:
---------------------------------------------------
three vectors were known:
X-original signal
N-zero mean white noise, variance is σ
Y-system output signal
-------------------------------------------------
system's input signal S=X+N
Y(ω)=S(ω)•H(ω)
H(ω) is unknown
--------------------------------------------------

Could anyone give me some suggestions about the matlab coding for the SNR calculation? Thanks a lot!
 

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