ACtE07 · Chapter 7Data Structures, DBMS & Operating Systems🏛️ Past Licensure QuestionID: 9087fbf1
If zeros are added to a signal, this process is known as:
If zeros are added to a signal, this process is known as:
Multiple Choice Options
- A✓ Correct Option
Zero Padding
- B
Signal Amplification
- C
Noise Filtering
- D
Signal Modulation
Detailed Technical Solution & Explanation
In digital signal processing (DSP), appending zeros to the end of a discrete-time signal sequence is known as Zero Padding. It is commonly performed before applying the Fast Fourier Transform (FFT) to achieve finer frequency bin interpolation and match power-of-two FFT block sizes ().
Option Analysis:
•
Option A (Zero Padding): Correct. Appending zero-valued samples to a discrete time-series is the formal definition of zero padding.
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Option B (Signal Amplification): Incorrect. Amplification multiplies signal samples by a gain factor , scaling amplitude without inserting zeros.
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Option C (Noise Filtering): Incorrect. Filtering removes unwanted frequency components using digital filters (e.g., FIR or IIR filters).
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Option D (Signal Modulation): Incorrect. Modulation varies the amplitude, frequency, or phase of a high-frequency carrier signal in accordance with a message signal.
Reference: Demo2 · Set 2NEC Licensure Syllabus