نتایج جستجو برای: communication systems
تعداد نتایج: 1451634 فیلتر نتایج به سال:
Application of ICT in health (eHealth) has become an integral part of modern healthcare systems. Electronic health information management has proven useful in improving quality of health care, reducing costs and facilitating health research. However, the increasing complexity of healthcare and the growing demand for high quality healthcare delivery has created a need for eHealth systems with t...
In this paper, a new Markovian model is developed to analyze the Packet Reservation Multiple Access (PRMA) protocol over Rician fading channels with lognormal shadowing. The packet dropping probability and the voice user capacity are defined as the performance measures. A new formula is derived to evaluate the dropping probability in the fading environment. The analytical results from our new f...
The scope of this deliverable is to provide an overview of modern wireless communication systems. This report has taken into consideration the popular cellular access technologies (GSM, UMTS) and WLAN. The basic characteristics and features of each technology are outlined, followed by the respective network architecture and measurements that enable the deployment of positioning techniques. The ...
This article is intended to serve as a “road map” for outlining typical steps to be considered in meeting the bandwidth, power, and error-performance requirements of a digital communication system. The criteria for choosing modulation and coding schemes, based on whether a system is bandwidth-limited or power-limited, are reviewed for several system examples, and the article emphasizes the subt...
The latest ITRS (International Technology Roadmap for Semiconductors) [1] has identified power consumption as a grand challenge for nanoelectronics. A related daunting task is represented by the passive wires (interconnects), see [2–8]. They are the ones driving the power/energy consumption, as their number increases exponentially (each device has to be connected by several wires to other devic...
The rapid evolution of long-haul optical communications systems, witnessed in the last five years, is due to the gradual adoption of spectrally efficient, multilevel modulation formats, in conjunction with polarization division multiplexing (PDM) and coherent intradyne detection assisted by digital signal processing (DSP). The objective of this tutorial chapter is to briefly review the operatin...
EEcient communication in networks is a prerequisite to exploit the performance of large parallel systems. For this reason much eeort has been done in recent years to develop eecient communication mechanisms. In this paper we survey the foundations and recent developments in designing and analyzing eecient packet routing algorithms.
Driver assistance systems are meant to support drivers with driving process in order to avoid traffic accidents, speed up the traffic and have a higher control over the traffic in general. There are a lot of systems which give support to the drivers, such as adaptive cruise control, traffic sign recognition, automatic parking, etc. In this paper we focus on the vehicular communication systems. ...
conclusions knowledge, attitude and performance of the communication skills of health staff are improper and it would lead to not using the communication skills to establish perfect communication with patients, so it seems that it is necessary to make the training courses during the service for health staff about communication skills and observing on performing the acquired skills. patients and...
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