The progressive relocation of part of the Energy Intensive Industries (EIIs) out of Europe is one of the possible consequences of the combination of emission charges and higher electricity prices entailed by the EU-Emission Trading Scheme (EU-ETS). In order to mitigate this effect, EIIs have asked for special power contracts whereby they would be supplied from dedicated power capacities at aver...

We present an optimal power and rate control policy for delay constrained traffic in next generation TDMA wireless systems. Our solution minimizes average transmit power while satisfying a constraint on the distribution of packets lost to deadline expiration. We also provide a means to account for erroneous and delayed channel estimates. Our results show the optimal power and rate adaption may ...

In this paper, we propose a dynamic power optimization method for asynchronous circuits with bundled-data implementation constraining operation delay. In asynchronous circuits, we can change the execution time of each operation freely under a given latency constraint. Therefore, the proposed method relaxes the execution time of operations which consume more power while it tightens the execution...

We address the peak-to-average power ratio (PAPR) of transmission signals in OFDM and consider the performance of tone reservation for reduction of the PAPR. Tone reservation is unique among methods for reducing PAPR, because it does not affect information bearing coefficients and involves no additional coordination of transmitter and receiver. It is shown that if the OFDM system always satisfi...

We study an uplink multi secondary user (SU) cognitive radio system having average delay constraints as well as an instantaneous interference constraint to the primary user (PU). If the interference channels from the SUs to the PU have independent but not identically distributed fading coefficients, then the SUs will experience heterogeneous delay performances. This is because SUs causing low i...

Adaptive modulation techniques combat fading by employing a suitable modulation mode depending on the instantaneous channel conditions for improving the Bit Error Rate (BER) performance or the average throughput. Based on a generic model of constant-power adaptive modulation, exact closed form expressions of the average BER and the average throughput are derived, when employing square Quadratur...

The relentless increase of power density has rendered temperature a primary design constraint for microprocessors. Although a power density increase does not necessarily lead to a higher time-average temperature, we show in this study that it increases the amplitude of temperature oscillations. As a consequence, thermal throttling may be engaged more often and degrade performance. We establish ...

This paper investigates the ergodic capacity of multipath channels in the wideband regime with limited feedback. Our work builds on recent results that have established significant capacity gains achievable in the wideband/low-SNR regime, when there is perfect channel state information (CSI) at the transmitter. Furthermore, this benchmark gain can be obtained with just 1-bit of CSI at the trans...