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The paper proposes a narrowband stochastic system model for auditory signal processing. The parameters are ipsilateral, contralateral and interaural hearing losses, false positive and false negative responses, and patient response time. The auditory model is then used to realize a patient simulator (artificial patient), comprising out of two microphones, a skull simulator, sound cards and a noiseless...
This paper proposes a novel, interactive telemedicine platform, providing real-time audio and video interactions among patients, physicians and health service provider. Such a system has been developed within the framework of the European Space Agency (ESA) project TElemedicine Services for HEALTH (TESHEALTH) in collaboration among industry, academia, and hospitals. In particular, in the framework...
Within the context of high-data rate transmissions over time varying multipath fading channels, this article presents a new receiver design for orthogonal frequency division multiplexing (OFDM) systems. The received signal is processed jointly in time and frequency domains. A Discrete Wavelet Transform is applied to the received signal before equalization which is based on the minimum mean square...
The paper presents a solar sensor to be embarked as payload of a micro-satellite that can provide information on the attitude of the satellite in space. The solar sensor has been developed in the framework of the Italian project EDUSAT (Educational Satellite), managed by ASI (Italian Space Agency), aiming at educating pupils at high school. Class rooms all over Italy will be supplied by payload telemetry...
OPNET has been widely used as a network simulator, but not much emphasis has been given on the performance of this simulator for ZigBee wireless sensor networks (WSN). Simulation of WSNs is a challenging task due to the nature of hardware design, energy limitations, and deployment of a vast number of nodes. An inclusive study and analysis of the QoS performance evaluation of the ZigBee protocol within...
An efficient, joint transmission delay and channel parameter estimation algorithm is proposed for uplink asynchronous direct-sequence code-division multiple access (DS-CDMA) systems based on the space-alternating generalized expectation maximization (SAGE) framework. The marginal likelihood of the unknown parameters, averaged over the data sequence, as well as the expectation and maximization steps...
In this paper, main single carrier (SC) and multicarrier (MC) systems with frequency domain equalization (FDE) are reviewed with the objective to identify key features of the evolution path of air interfaces towards 4G. In particular, this paper shows that the FFT/IFFT operation can be seen as the concatenation of two operations: S/P conversion and spreading. We show that the transmitter of an OFDMA...
Distributed wireless sensor networks (WSNs) promise to change the way industrial systems and structures are monitored and controlled. This paper presents a WSN simulation model for a partial discharge (PD) WSN monitoring system for HV systems. A simulation model of a ZigBee sensor network has been simulated to be positioned at 6 locations of an HV transformer to record the PD readings and associated...
The paper presents an iterative scheme that incrementally minimizes the Kullback-Leibler divergence between joint posterior and nuisance parameter distribution, and directly minimizes the Kullback-Leibler divergence between joint posterior and parameter-of-interest distribution in alternating order. This so-called variational Bayes incremental expectation maximization (VB-IEM) algorithm has two virtues:...
This paper deals with the derivation and optimization of an iterative receiver architecture performing joint multiuser decoding and channel estimation. We consider an asynchronous multirate convolutional coded DS-CDMA system that communicates over quasi-static flat Rayleigh fading channels. The proposed receiver is derived within the space-alternating generalized expectation-maximization (SAGE) framework...
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