Q. QPSK has the bandwidth efficiency of BPSK.

  • (A) twice
  • (B) same
  • (C) half
  • (D) four times
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✅ Correct Answer: (A) twice
Explanation: quadrature phase shift keying (qpsk) has twice the bandwidth of bpsk. it is because two bits are transmitted in a single modulation symbol. the phase of the carrier takes on one of the four equally spaced values, where each value of phase corresponds to a unique pair of message bit.

Published by Ram Sharma ⭐ 193.88K Points at 08-Feb-2025 07:16 pm in Communication Engineering

Explanation by: Ram Sharma
quadrature phase shift keying (qpsk) has twice the bandwidth of bpsk. it is because two bits are transmitted in a single modulation symbol. the phase of the carrier takes on one of the four equally spaced values, where each value of phase corresponds to a unique pair of message bit.

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