Development of fair and efficient algorithms for resource allocation to secondary users (SUs) is one of the key issues in the design of cognitive radio (CR) systems. In this paper, we present a two-step resource alloc...
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Smart Offices promise the improvement of working conditions in terms of efficiency, productivity and facility. However, new cybersecurity challenges arise associated with the new capabilities of Smart Cities. One of t...
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Node classification on graph data is a major problem, and various graph neural networks (GNNs) have been proposed. Variants of GNNs such as H2GCN and CPF outperform graph convolutional networks (GCNs) by improving on ...
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The development of small integrated antennas plays a significant role in the progress of rapidly expanding wireless communication applications. The proposed planar inverted-F antenna is designed for multi-bands operat...
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A Wireless Sensor Network is made up of a large number of small, low-power sensor nodes that are randomly or manually distributed across an uncontrolled target ***, the WSNs' main constraint is the sensor nodes...
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Nowadays, sleep apnea is a disease with a high prevalence. Its diagnosis requires to admit the patient in a hospital sleep unit and to conduct a polysomnography during the night. For this reason, many efforts have bee...
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ISBN:
(纸本)9789898425898
Nowadays, sleep apnea is a disease with a high prevalence. Its diagnosis requires to admit the patient in a hospital sleep unit and to conduct a polysomnography during the night. For this reason, many efforts have been devoted to alternative techniques to diagnose apnea from other signals, such as ECG or oxygen saturation, easier to obtain outside a hospital. The aim of this work is to investigate if these recordings behave similar to overnight ECGs. This paper presents the results of a small study (only 7 patients) conducted on short naps using heart rate variability (HRV) parameters. The results indicate that the spectral parameters are different for obstructive sleep apnea (OSA) and healthy patients. Relationship with the apnea/hypoapnea index (AHI) was also different. This is a promising starting point for more extensive studies in the future.
Low latency communication has attracted much interest in recent years due to the emergence of new types of delay-sensitive applications. Ultra-Reliable and Low-Latency Communication (URLLC) is also considered as one o...
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We introduce the KEYed user interface, an ergonomic and intuitive method for controlling music composition software from a piano controller by adding a momentary foot switch. The piano keyboard mappings provide increa...
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During any significant event, particularly during natural catastrophes, social media is an essential information source. It is claimed that data generated by social networking sites would enable regular people to beco...
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This paper presents the the design of a digital down converter (DDC) using a digital Costas loop in a field programmable gate array (FPGA). The designed DDC is one of the modules in the receiver of the base station in...
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ISBN:
(纸本)9781424438853
This paper presents the the design of a digital down converter (DDC) using a digital Costas loop in a field programmable gate array (FPGA). The designed DDC is one of the modules in the receiver of the base station in a wireless local positioning systems (WLPS). WLPS is capable of localization in the GPS-denied environments such as indoor and underground. The final results and performance measures are quantified and discussed. At the bit error rate (BER) of 10-4 our fixed point implementation of the demodulator using the Costas loop performs only 0.125 dB worst than the theoretical limit.
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