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QAM Modulation with Different Phases & Amplitudes Imag. (Constellation plot for circular 16-QAM) Real • Rectangular QAM constellations are, in general, sub-optimal in the sense that they do not maximally space the constellation points for a given energy. However, they have the considerable advantage that they may be easily transmitted as two pulse amplitude modulation (PAM) signals on quadrature carriers, and can be easily demodulated. The non-square constellation achieves marginally better bit-error rate (BER) but is harder to modulate and demodulate.

          QAM Modulation with Different Phases & Amplitudes
Imag.
(Constellation plot for circular 16-QAM)
Real
• Rectangular QAM constellations are, in
general, sub-optimal in the sense that
they do not maximally space the
constellation points for a given energy.
However, they have the considerable
advantage that they may be easily
transmitted as two pulse amplitude
modulation (PAM) signals on quadrature
carriers, and can be easily demodulated.
The non-square constellation achieves
marginally better bit-error rate (BER) but
is harder to modulate and demodulate.

Show more…

QAM Modulation with Different Phases Amplitudes
Imag.
(Constellation plot for circular 16-QAM)
Real
• Rectangular QAM constellations are, in
general, sub-optimal in the sense that
they do not maximally space the
constellation points for a given energy.
However, they have the considerable
advantage that they may be easily
transmitted as two pulse amplitude
modulation (PAM) signals on quadrature
carriers, and can be easily demodulated.
The non-square constellation achieves
marginally better bit-error rate (BER) but
is harder to modulate and demodulate.

Added by Kevin Y.

University Physics with Modern Physics

Hugh D. Young 14th Edition

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Solved by Expert Jaya M

Step 1

The figure is a constellation plot for circular 16-QAM modulation. A constellation plot is a graphical representation of the symbols used in a modulation scheme. In this case, it shows the positions of the 16 different symbols used in 16-QAM. Show more…

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Explain The Following Figure And write an equation for the Symbols in the figure NOTE: Symbols are shown by RED DOTS in the figure QAM Modulation with Different Phases & Amplitudes Imag. (Constellation plot for circular 16-QAM) Rectangular QAM constellations are, in general, sub-optimal in the sense that they do not maximally space the constellation points for a given energy. However, they have the considerable advantage that they may be easily transmitted as two pulse amplitude modulation (PAM) signals on quadrature carriers and can be easily demodulated. The non-square constellation achieves marginally better bit-error rate (BER) but is harder to modulate and demodulate. Real

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