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We present a case for automating the selection of MPI-IO performance optimizations, with an ultimate goal to relieve the application programmer from these details, thereby improving their productivity. Programmers productivity has always been overlooked as compared to the performance optimizations in high performance computing community. In this paper we present RFSA, a reduced function set abstraction...
Ultra-WideBand (UWB) technology is very attractive since it offers a different approach to wireless communication compared to conventional narrow band systems. Global interest in this technology is high. This paper reports on the state of the art of UWB wireless technology and highlights key UWB features to apply UWB concepts in EHF frequencies, considering technological constraints and challenges...
In this paper we present time slot groups (TSG), a novel, efficient data structure for QoS-constrained advance bandwidth reservation and admission control. The data structure divides the time horizon into T equally sized time slots and can be used for serving efficiently complex bandwidth reservation requests specifying the duration of the reservation, the minimum required bandwidth, the earliest...
Distributed resource allocation is an important problem in wireless ad hoc networks, in which there is no centralized scheduler and the resource allocation is carried out in a distributed way. Information exchange in the distributed resource allocation incurs overhead since it does not convey data information. The communication complexity, defined as the minimum number of exchanged messages needed...
In this paper, we propose a robust STBC transmission scheme to combat the timing synchronization errors over frequency-selective multiple-access channels. First, the equivalent channel model in the presence of timing synchronization errors is derived and we find that the synchronization errors result in an equivalent channel model with larger number of correlated channel taps. Based on this correlated...
While elegant in form, the maximum likelihood estimator (MLE) for heavily bandwidth-constrained distributed estimation in Gaussian noise is computationally expensive to implement. We consider an alternative estimator for this case which requires far less computational complexity, yet performs close to the MLE under the same operating conditions.
The ergodic capacity of single input multiple output (SIMO) wireless communication systems over Nakagami-m fading channels is available in the literature for the case of identically independent distributed (i.i.d.) subchannels. However, the non- identically independent Nakagami-m case is more practical and has not been considered in the literature. In this paper, we derive an analytical expression...
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