Question: ( 7 ) In a pulse - amplitude modulation ( PAM ) transmission scheme, binary data are represented with voltage levels of + A for

(7) In a pulse-amplitude modulation (PAM) transmission scheme, binary data are represented with voltage levels of +A for a 1 and - A for a 0. Suppose that a 1 is transmitted and received in the presence of Gaussian noise having a mean of zero and a variance of 2. In this case, the received data can be represented by the random variable
( 7 ) In a pulse - amplitude modulation ( PAM )

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