What does the number in the various Quadrature Amplitude Modulation levels, such as 16 in QAM- 16 and 64 in QAM-64, indicate? (Choose the single best answer.)

Question

Options

• AThe speed of data transfer, which is four times the number in the QAM level
• BThe channel width, which is stipulated in MHz
• CThe number of target points in the QAM constellation, which are equivalent to amplitude and
• DThe number of spatial streams, which is 1/4 the number in the QAM level

• A
  13% (4)
• B
  3% (1)
• C
  78% (25)
• D
  6% (2)

Explanation

QAM Constellations: QAM (Quadrature Amplitude Modulation) uses a constellation diagram where points represent unique combinations of amplitude and phase. Bits per Symbol: The number in QAM-XX indicates the number of points: QAM-16: 16 points = 2^4 = 4 bits per symbol QAM-64: 64 points = 2^6 = 6 bits per symbol Higher Data Rates: More points in the constellation enable transmitting more bits per symbol, leading to higher data rates at the same bandwidth.

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