Question
Download Solution PDF__________ is a multilevel modulation in which four phase shift are used for representing four different symbols.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is 1) QPSK (Quadrature Phase Shift Keying).
Explanation
- QPSK (Quadrature Phase Shift Keying):
- QPSK is a multilevel modulation technique that uses four distinct phase shifts to represent four different symbols.
- These four phases are typically separated by 90 degrees (e.g., 45°, 135°, 225°, and 315°).
- Each symbol represents two bits of information, allowing for twice the data rate compared to BPSK.
- Other options:
- BFSK (Binary Frequency Shift Keying): Uses two different frequencies.
- BPSK (Binary Phase Shift Keying): Uses two phase shifts.
- 8-PSK: Uses eight phase shifts.
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