Energy Minimization by Selecting Appropriate Modulation and Coding Scheme for MB-OFDM UWB Systems

Optimal thresholds for discrete power levels using adaptive modulation in presence of imperfect channel state information

“…We deduce from the obtained results in Figure 2 and Figure 3 that changing all of the channel parameters (average SNR), fading parameter ( ) and correlation parameter ( ), keep in a close performance to .  Figure 4 shows that although the applied suboptimal method in [7], [14]- [16] based on continuous power, the obtained results show weaker performance. It is obvious that the introduced approach for discrete power shows better performance and it is not limited to Rayleigh fading compared to continuous power levels in [7].…”

“…Figure 4 Comparison between proposed approach, [7], [14], [16] for power adaptation parameter and SNR changes when fading parameter is Figure 5 The ratio of feedback rates for two discrete and continuous power approaches [8] ASE [14] ASE [15] ASE [ …”

“…In [13] we examined energy efficiency (EE) through adaptive rate modulation and packet error rate investigation. In addition, in our work [14] we investigate EE following a cross-layer design through modulation and coding scheme (MCS).…”

Energy Expenditure Per Bit Minimization Into Mb-Ofdm Uwb Systems

“…Moreover, the main concern in our previous work [14] was about EE improvement by considering MCS scheme only. In [15], our purpose consisted on minimizing the energy per throughput into a cross-layer MB-UWB design. The focus pursued in this contribution is to determine the efficient MCS rate allowing energy per bit expenditure diminishing.…”