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Adaptive modulation and diversity combining represent very
important adaptive solutions for future generations of wireless
communication systems. Indeed, to improve the performance and the
efficiency of these systems, these two techniques recently have
been used jointly in new schemes named joint adaptive modulation
and diversity combining (JAMDC) schemes. Considering the problem of
finding lowcomplexity, bandwidth-efficient, and processing-power
efficient transmission schemes for a downlink scenario and
capitalizing on some of these recently proposed JAMDC schemes, we
propose and analyze three fully joint adaptive modulation,
diversity combining, and power control (FJAMDC) schemes. More
specifically, the modulation constellation size, the number of
combined diversity paths, and the needed power level are determined
jointly to achieve the highest spectral efficiency with the lowest
possible combining complexity, given the fading channel conditions
and the required bit error rate (BER) performance. The performance
of these three FJAMDC schemes is analyzed in terms of their
spectral efficiency, processing power consumption, and error- rate
performance.
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