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Communication SystemsDigital Modulation

A QPSK system transmits at 20 ksymbols/s. Ignoring coding overhead, its bit rate is?

  • A10 kbps
  • B20 kbps
  • C40 kbps
  • D80 kbps
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Correct Answer: C. 40 kbps
Explanation: QPSK carries 2 bits per symbol, so Rb=20 ksymbols/s × 2 = 40 kbps.
Reference: Standard communication systems: digital modulation
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