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Communication SystemsPCM & Multiplexing

For an ideal full-scale sinusoid and a uniform PCM quantizer, increasing resolution by one bit improves the approximate signal-to-quantization-noise ratio by about?

  • A1 dB
  • B3 dB
  • C6 dB
  • D20 dB
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Correct Answer: C. 6 dB
Explanation: The common approximation SQNR≈6.02n+1.76 dB for a full-scale sinusoid shows about 6 dB improvement per added bit.
Reference: Standard communication systems: pcm & multiplexing
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