Touch tone on telephone can be analyzed by a. Fourier Transform b. Fourier Serie

Question

Touch tone on telephone can be analyzed by a. Fourier Transform b. Fourier Series c. Discrete Time Fourier Transform d. Discrete Fourier Transform Average value of the signal corresponding to a. DC component b. Fundamental frequency c. 1st Harmonic d. 2nd Harmonic Connect left side choices to correct choices in right side a. Fourier Transform b. Fourier Series c. DFT d. DTFT e. Continuous input rightarrow discrete output f. Discrete input rightarrow discrete output g. Discrete input rightarrow continuous output h. Continuous input rightarrow continuous output Input samples of N length sequence x[n] is converted into M length sequence using DFT. Frequency domain resolution depends on a. N b. M c. both M & N d. Can't say about it. Maximum input frequency represented by N length DFT at sample location a. N b. N/4 c. N/2 d. 0

Explanation / Answer

1)Discrete Fourier Transform

2)DC component

3)

Fourier Transform-Continuous input -Discrete output

Fourier Series-Continuous input -Continuous output

DFT-Discrete input -Discrete output

DTFT-Discrete input continuous output

4)M

5)N/2

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