Conference
International Conference on Telecommunications
About: International Conference on Telecommunications is an academic conference. The conference publishes majorly in the area(s): Thermoelectric effect & Quality of service. Over the lifetime, 7001 publications have been published by the conference receiving 42372 citations.
Topics: Thermoelectric effect, Quality of service, Network packet, Seebeck coefficient, Wireless network
Papers published on a yearly basis
Papers
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17 Nov 2003
TL;DR: Current state-of-the-art of circuit design and implementation platforms based on this new concept are reviewed and discussed in detail and future research and development trends are discussed with reference to low-cost innovative design of millimeter-wave and optoelectronic integrated circuits.
Abstract: A new generation of high-frequency integrated circuits is presented, which is called substrate integrated circuits (SICs). Current state-of-the-art of circuit design and implementation platforms based on this new concept are reviewed and discussed in detail. Different possibilities and numerous advantages of the SICs are shown for microwave, millimeter-wave and optoelectronics applications. Practical examples are illustrated with theoretical and experimental results for substrate integrated waveguide (SIW), substrate integrated slab waveguide (SISW) and substrate integrated nonradiating dielectric (SINRD) guide circuits. Future research and development trends are also discussed with reference to low-cost innovative design of millimeter-wave and optoelectronic integrated circuits.
660 citations
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19 Sep 2001
TL;DR: This article deals with defining the radar cross section, presenting some method for reduction and focuses on analyzing some of the features of radar absorbing materials with variable conductivity.
Abstract: The technological evolution in signal processing that has been made in last decades led to improvements in radar performances. Increasing the radar range by improving its sensitivity has been made by the designers of aircraft and other military systems to try to decrease the radar cross section of these types of equipment. The radar cross section is a matter of survivability for an aircraft and, for this, any measure designed to decrease this important parameter has to be taken into consideration. This article deals with defining the radar cross section, presenting some method for reduction and focuses on analyzing some of the features of radar absorbing materials with variable conductivity.
426 citations
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29 Aug 1999TL;DR: In this paper, a microthermoelectric (TE) coolers are used in high power electronic devices such as laser diodes to stabilize temperature, and the authors have developed a fabrication technique to create micro-TE modules with a cross-section element size of about 100 /spl mu/m/spl times/100 /spl µ/m and a height of several hundred mm.
Abstract: Microthermoelectric (TE) coolers are currently used in high power electronic devices such as laser diodes to stabilize temperature. With the aim of miniaturizing this technology, we have developed a fabrication technique to create micro-TE modules with a cross-section element size of about 100 /spl mu/m/spl times/100 /spl mu/m and a height of several hundred mm. We have previously reported the cooling properties of a module fabricated by this technique. With the recent advances in micro-electric technology, which has decreased the energy consumption in an electric wristwatch to about 1 /spl mu/W, there has been increased discussion about utilizing these micro-TE modules to generate energy of several /spl mu/W to power a wristwatch. In response, we have developed a micro-TE module with an overall size of 2 /spl times/ 2 /spl times/ 1.3 mm consisting of more than 50 pairs of elements, and have succeeded in making and marketing a TE powered wristwatch. This paper presents the fabrication and the properties of the micro-TE module, as well as the TE powered wristwatch.
238 citations
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01 Jan 2019TL;DR: This paper addresses the mobility of the things and the connectivity in each of the three LPWAN standards: LoRaWAN, DASH7, and NB-IoT, and provides a general and technical comparison for the three standards.
Abstract: Low-power wide area networks (LPWANs) constitute a type of networks which is used to connect things to the Internet from a wide variety of sectors. These types of technologies provide the Internet of Things (IoT) devices with the ability to transmit few bytes of data for long ranges, taking into consideration minimum power consumption. In parallel, IoT applications will cover a wide range of human and life needs from smart environments (cities, home, transportation, etc.) to health and quality of life. Among these popular LPWANs technologies, we have identified the unlicensed frequency band (LoRa, DASH7, SigFox, Wi-SUN, etc.), and the licensed frequency band standards (NB-IoT, LTE Cat-M, EC-GSM-IoT, etc.). In general, both types of standards only consider fixed interconnected things, and less attention has been provided to the mobility of the things or devices. In this paper, we address the mobility of the things and the connectivity in each of the three LPWAN standards: LoRaWAN, DASH7, and NB-IoT. In particular, we show how the mobility of things can be achieved when transmitting and receiving data. Then, we provide a general and technical comparison for the three standards. Finally, we illustrate several application scenarios where the mobility is required, and we show how to select the most suited standard. We also discuss the research challenges and perspectives.
237 citations
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16 May 2016TL;DR: The technical differences between a wideband spread spectrum (LoRa- like) and an ultra narrowband (Sigfox-like) network will be explained and evaluated and simulations show that adaptation of frequency and modulation is imperative for efficiently dealing with varying contention and interference in long range unlicensed networks.
Abstract: A broad range of emerging applications require very low power, very long range yet low throughput communication. Different standards are being proposed to meet these novel requirements. In this paper, the technical differences between a wideband spread spectrum (LoRa-like) and an ultra narrowband (Sigfox-like) network will be explained and evaluated. On the physical layer, simulation results show that an ultra narrowband network has a larger coverage, while wideband spread spectrum networks are less sensitive to interference. When considering the contention between nodes and interference between different networks, simulations show that adaptation of frequency and modulation is imperative for efficiently dealing with varying contention and interference in long range unlicensed networks. Depending on network load, size and distance, a device in a wideband network can send 6 times more packets to the base station when there is active rate and frequency management and an intra-technology control plane.
221 citations