Using (8 146), derive an expression for the ratio of the noise power in y D (t) with de emphasis to the noise power in y D (t) without de emphasis Plot this ratio as a function of W f 3 Evaluate the ratio for the standard values of f 3 2 1 kHz and W 15 kHz, and use the result to determine the improvement, in decibels, that results through the use of dc emphasis Compare the result with that found in Example 8 3

Question: Using (8.146), derive an expression for the ratio of the noise power in y D (t) with de-emphasis to the noise power in y D

Using (8.146), derive an expression for the ratio of the noise power in y_D(t) with de-emphasis to the noise power in y_D(t) without de-emphasis. Plot this ratio as a function of W/f₃. Evaluate the ratio for the standard values of f₃ = 2.1 kHz and W = 15 kHz, and use the result to determine the improvement, in decibels, that results through the use of dc-emphasis. Compare the result with that found in Example 8.3.

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