Electronis Discussion
0 votes

The signal $x(t)=\sin (14000\Pi t)$, where t is in seconds, is sampled at a rate of 9000 samples per second. The sampled signal is the input to an ideal lowpass filter with frequency response $H(f)$ as follows:

$H(f)=\begin{cases} 1, & \left | f \right |\leq 12 kHz .\\ 0,& \left | f \right |> 12 kHz . \end{cases}$

What is the number of sinusoids in the output and their frequencies in kHz?

 

  1. Number = 1, frequency = 7
  2. Number = 3, frequencies = 2,7,11
  3. Number = 2, frequencies = 2,7
  4. Number = 2, frequencies = 7,11
in Communications by (2.7k points)
recategorized by

Please log in or register to answer this question.

Answer:
Welcome to GO Electronics, where you can ask questions and receive answers from other members of the community.
1,042 questions
39 answers
8 comments
42,712 users