Problem 7.1 A real-valued signal xx() is known to be uniquely determined by its samples when the sampling frequency is =10,000. For what values of ω is ( ) guaranteed to be zero? Please note that frequency can be positive and negative

IωI > 5000π rad/s

Explanation:

Step 1  

The value of ω at which X(jω) is assumed to be zero is given by,  

IωI > ω_M

where ω_M  is the maximum frequency of the original signal.

Assume that the sampling frequency we equals the Nyquist rate ω_N  

Step 2  

Then the value of ω is given by,  

IωI > ω_M

     > ω_s/2

     > 10000π/2

     > 5000π

thus,

IωI > 5000π rad/s

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explanation:

answer:

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