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نتیجه جستجو - کم قدرت

تعداد مقالات یافته شده: 11
ردیف عنوان نوع
1 Field-programmable gate arrays in a low power vision system
آرایه های دروازه ای قابل برنامه ریزی در یک سیستم دید کم قدرت-2021
In recent years, field-programmable gate arrays have played a major role in developing low power electronic systems. End users usually prefer systems with high performance, reduced size, and low power consumption. These requirements create a challenging task for designers. Re-configuring technology allows the use of field-programmable gate arrays to be at the maximum level during runtime. This paper proposes the implementation of the Dynamic Partial Reconfiguration technique to switch during runtime between two edge detection algorithms (FASTX and Sobel) in a computer vision algorithm. Xilinx Ultrascale+ZCU106 has been used as the implementation target since it consumes approximately 4% less power during runtime. It was discovered that the dynamic switching between algorithms reduces the on-chip area utilization. Finally, through experimental results our proposed work has demonstrated the applicability of computer vision with low power consumption.
Keywords: Ultrascale | Low power | Computer vision application | Dynamic partial reconfiguration
مقاله انگلیسی
2 An Overview of AI-Enabled Remote Smart-Home Monitoring System Using LoRa
مروری بر سیستم مانیتورینگ از راه دور هوشمند در خانه با هوش مصنوعی با استفاده از LoRa-2020
With the advancement of communication technology, Internet of Things (IoT) enabled smart home (SH) applications have engrossed substantial attention nowadays. However, a few meter range coverage and higher implementation cost are the main limitations of existing SH systems based on other cellular networks or short distance technologies. In this paper, a long range (LoRa) based SH system is proposed for remote monitoring and maintenance of IoT sensors and devices using artificial intelligence (AI) concept. A brief overview of what tasks LoRa can perform in SH networking are conferred. An AI-based data flow system for IoT server and cloud is also presented in this paper.
Keywords: Low-power | wide area network (LPWAN) | internet of things (IoT) | long range (LoRa) | smart home (SH) | artificial intelligence (AI)
مقاله انگلیسی
3 A new elastic trickle timer algorithm for Internet of Things
الگوریتم تایمر جدید الاستیک برای اینترنت اشیاء -2017
The term IoT emerging services is used to refer to the modern kinds of services that IoT can provide to enhance service and experience quality by reducing complexity, speeding up requests, and using techniques involved with cloud, Big Data, and protocols to allows services to function seamlessly. Therefore, IoT utilises protocols found within different network layers. RPL or Routing Protocol for Low Power and Lossy Networks is one of the most important routing protocols utilised on the network layer. This protocol is considered an IPV6 distance vector proactive routing protocol. The trickle timer algorithm is one of its major components. This algorithm is used to control and track the control messages’ flow throughout the network. However, one weakness of the trickle algorithm is that it suffers from short listen problem that makes some nodes starve for delay and long latency in propagating transmissions. Based on existing literature, there have been several research studies on this trickle method. Development of the Enhanced Trickle algorithm (E-Trickle) was done to get rid of the listen only period. However, there still is relatively low activity on studying the trickle algorithm’s performance merits. Our proposed elastic trickle timer algorithm will try to fill this gap by dealing only with the listen to only period problems. The power consumption and convergence time are mainly affected. Therefore, our proposed algorithm was incorporated in the Routing Protocol for Low Power and Lossy Networks (RPL). Different network densities were used to evaluate the simulation experiments. Its implementation was done on 20, 40, 60, and 80 nodes using different ratios for reception success (RX) (20%, 40%, 60%, 80%, and 100%), and grid network and random topologies were used. The Cooja 2.7 simulator was used to implement the simulation experiments, and RPL performance was studied through the elastic trickle timer algorithm. Measurement of the simulation experiments was done on various performance metrics such as packet delivery ratio (PDR), convergence time, and power consumption. Comparison of the results was done using the standard trickle timer algorithm. Using random and grid topologies, the results revealed greater enhancements in terms of convergence time. Simulation results revealed that when the network was made up of 20 nodes, there was 35% less convergence time. Moreover, when 40 nodes were randomly placed, there was 62% less convergence time, and 71% less convergence time when 40 nodes were situated in a grid topology. Additionally, there was 70% less convergence time when the network was made up of 60 nodes and approximately 76% less convergence time when there were 80 nodes. Moreover, the simulation results revealed that in terms of energy consumption, the new algorithm exhibited superior performance characteristics.
Keywords: Internet of Things | IoT | Routing protocol for low power and lossy | networks | RPL | Trickle timer algorithm | Emerging services
مقاله انگلیسی
4 New advances of high-level synthesis for efficient and reliable hardware design
پیشرفت های جدید سنتز سطح بالا برای طراحی سخت افزار کارآمد و قابل اعتماد-2017
The spectacular CMOS technology scaling will continue to evolve and dominate the semiconductor industry. This will lead to tens of billions of transistors integrated on a single chip by the year 2020. However, one significant problem is that the design productivity for complex designs has been lagging behind. In addition to several proposed techniques for dealing with the widening productivity gap, e.g., IP reuse and integration, virtual platform modeling, formal verification and others, high-level synthesis (HLS) has been touted as an important solution as it can significantly reduce the number of man-hours required for a design by raising the level of design abstraction. However, existing HLS solutions have limitations, and studies show that the design quality of HLS can be inferior compared to that of manual RTL design. In this paper, we will present a set of new techniques developed recently to drastically improve HLS solutions, which not only improve the traditional design metrics such as circuit performance and energy efficiency but also emerging metrics such as hardware security and robustness. We will also discuss how HLS can collaborate with other techniques to provide a holistic design methodology that can enable the delivery of high-quality designs with much less design cost and much faster time-to-market.
Keywords: High-level synthesis | Designer productivity | Quality of results | Reliability | Security | Verification | Validation | Time to market | Modeling | Performance | Low power | Area cost | Polyhedral optimization | Parallel languages | Interconnect optimization | Variation aware | Multicycle path | IP integration | Benchmarks
مقاله انگلیسی
5 ERAOF : یک تابع هدف پروتکل RPL جدید برای کاربرد های اینترنت اشیا
سال انتشار: 2017 - تعداد صفحات فایل pdf انگلیسی: 5 - تعداد صفحات فایل doc فارسی: 16
RPL از زمان تعریف شدنش (پروتکل ipv6 برای شبکه های کم قدرت و پرنویز) به عنوان پروتکل لازم برای مسیریابی در اینترنت اشیا مطرح شده است. RPL یک پروتکل مسیریابی پیشگیرانه است که روند ایجاد مسیر را براساس توابع هدف (OFs) انجام می دهد. OF ها مسئول تعیین قوانین و محدودیت ها هستند تا بهترین مسیرها را با توجه به معیارهای مسیریابی متفاوت انتخاب کنند. در تعریف خود، RPL استفاده از پیش فرض OF را تحمیل نمی کند و نشان می دهد که یک OF باید مطابق با برنامه انتخاب شود. بنابراين، در اين مقاله، يک تابع هدف (ERAOF) با کارایی بالا و قابليت اطمينان براي برنامه هاي IoT مورد نياز است. ERAOF مبتنی بر ترکیب انرژی و معیارهای مسیریابی باکیفیت است. نتایج نشان می دهد که ERAOF قادر به بهبود عملکرد شبکه در مقایسه با دیگر OF های موجود است.
کلمات کلیدی: برنامه نویسی خطی | اندازه گیری | مسیریابی | پروتکل های مسیریابی | قابلیت اطمینان | ارتباطات داده
مقاله ترجمه شده
6 A 64 μW, 23 dB Gain, 8 dB NF, 2:4 GHz RF Front-end for Ultra Low Power Internet-of-Things Transceivers
64 مگاهرتز، 23 دسی بل، 8 دسی بل NF، 2: 4 گیگاهرتز فرکانس رادیویی RF برای فرستنده های اینترنتی با کمترین توان انتقال دهنده اینترنت اشیا -2017
An ultra-low power (ULP) 2.4 GHz RF front-end which consists of a low noise amplifier (LNA) and a passive mixer in a standard 65nm CMOS is presented. LNA adopts a complementary input stage and a current reused 2nd gain stage to achieve a high gain under a low power dissipation with an added linearization method. RF Down-conversion is implemented with a highly linearized complementary passive mixer, which adopts transmission gate type switches. With fully on-chip components, the front-end achieves 23 dB conversion gain, 8 dB NF, -36 dBm P1dB and -21 dBm IIP3 while dissipating a 64 μW power from a 0.6 V supply voltage. LNA achieves a high voltage gain of 26.3 dB and minimum NF of 5.5 dB with a P1dB of -27 dBm and IIP3 of -13 dBm.
Index Terms: Ultra Low Power |Mixer | LNA | IoT | CMOS
مقاله انگلیسی
7 Self-Correcting Time Synchronization Support for Wireless Sensor Networks Targeting Applications on Internet of Things
پشتیبانی هماهنگ سازی زمان خود اصلاح برای هدف قرار دادن برنامه های شبکه های حسگر بی سیم در اینترنت اشیا-2016
The Internet of Things is a collection of devices that communicate by exchanging a variety of data among them, in which time synchronization is needed for meaningful information creation and transmission. The robustness of the data transmissions becomes an issue, since most of these devices use wireless communication. This paper focuses in proposing and implementing a time synchronization service for low-power wireless sensor networks using low frequency real-time clocks in each node. This work presents the design, implementation and test of an adaptive algorithm, making the timing of the clocks converge as quickly as possible and after this convergence, keeping them most similar as possible. The goal is to achieve the best method that ensures right timing and still having low energy consumption. Experimental results provide evidence of the success in meeting this goal.
Keywords:Time synchronization | Wireless sensor networks | Low-power | Latency | Self-Correcting | Clock prediction | Real-time and Internet of things
مقاله انگلیسی
8 Low power CMOS power amplifier design for RFID and the Internet of Things
طراحی تقویت کننده CMOS کم قدرت برای RFID و اینترنت اشیاء-2015
Designing power amplifiers with low power consumption, high efficiency and integration is an important topic with significant impact on communication and circuit research areas. In order to make transceivers more powerful with lower cost and higher integration, a CMOS power amplifier working from 3.5 GHz to 4.5 GHz is proposed. Cascode driver stage is adopted to give the power amplifier high output gain ability. The output stage is designed as Class A, which makes the proposed power amplifier in a significantly high linearity level. Furthermore, this paper gives a comparative study of the performance of different power amplifier classes. Simulation results show that the proposed power amplifier has 31.2% more power added efficiency (PAE) and 12.6 dB output power gain, respectively. The proposed power amplifier has high linearity and efficiency, which are suitable for Radio Frequency Identification (RFID) and Internet of Things (IoT) applications.© 2015 Elsevier Ltd. All rights reserved.
Keywords: CMOS | Power amplifier | Transceiver | Wireless communication
مقاله انگلیسی
9 Security in the integration of low-power Wireless Sensor Networks with the Internet: A survey
امنیت در ادغام شبکه های سنسور بی سیم کم قدرت با اینترنت: یک بررسی-2015
The integration of low-power wireless sensing and actuating devices with the Internet will provide an important contribution to the formation of a global communications architecture encompassing Wireless Sensor Networks (WSN), and to enable applications using such devices designed to bring unprecedented convenience and economical benefits to our life. Such applications also take place in the context of our current vision on an Internet of Things (IoT), which promises to encompass heterogeneous devices and communication technologies, including WSN. Due to the characteristics of the devices in WSN and to the requirements of applications, low-power wireless communications are employed and the functionalities supported must be carefully balanced against the limited resources at the disposal of applications. Low-power communication technologies are also currently being designed with the purpose of supporting the integration of WSN with the Internet and, as in isolated WSN environments, security will be a fundamental enabling factor of future applications using Internet-integrated WSN. Although various surveys currently exist addressing security mechanisms for WSN environments, our goal is to analyze how security may be addressed as an enabling factor of the integration of low-power WSN with the Internet, in the context of its contribution to the IoT. We analyze the current research and industry proposals supporting this integration, together with the security solutions and mechanisms designed in its context. Our discussion is supported by an analysis on the attack and threat model against Internet-integrated WSN, and on the security requirements to consider in this context. We believe that a survey with such goals may provide an important contribution to readers interested in embracing this important area of research and ours is, as far as our knowledge goes, the first article with such goals. Keywords: Internet-integrated WSN 6LoWPAN RPL DTLS CoAP Internet of Things
مقاله انگلیسی
10 شبکه های حسگر بی سیم در عصر اینترنت اشیا و محاسبات ابری
سال انتشار: 2014 - تعداد صفحات فایل pdf انگلیسی: 8 - تعداد صفحات فایل doc فارسی: 20
در گذشته تحولات توپولوژیکی بسیاری، شامل انتقال از عصر آنالوگ به دیجیتال و از راه‌حل‌های سیم‌کشی‌شده مرکزی به سیستم های بی‌سیم فراگیر، مشاهده کرده‌ایم. خصوصاً، ظهور دستگاه‌های گیرنده و فرستنده‌ی کم هزینه‌ و کم قدرت، به همراه توسعه‌ی پشته‌هایی با اندازه‌ی جمع و جور و استاندارد باز، شبکه‌های حس‌گر بی‌سیم(WSN) را ممکن ساخته که برای خانه و دفتر کار و برنامه‌های نظارت صنعتی پذیرفته شده‌اند. امروزه، هدف بلندپروازانه، نمونه‌برداری، جمع‌آوری و تحلیل هر قسمت از اطلاعات اطرافمان، برای بهبود کارایی تولید و تأمین اعتبار مصرف منابع بهینه است. «اینترنت اشیاء » (IOT) یعنی توانایی اتصال هر دستگاه ممکن به وب گسترده‌ی جهانی، یک جواب عملی به این درخواست است. در نتیجه اطلاعات بسیار زیادی که تولید می‌شوند، می‌توانند به طور مفید با استفاده از سرویس‌های «ابر » مانند چهارچوب‌های سخت‌افزاری و نرم‌افزاری قابل انعطاف که می‌توانند محاسبات را به عنوان یک سرویس اجرا کنند، کنترل شوند. هدف از این کار، از سرگیری به نفع یا بر علیه تکنولوژی‌های WSN پذیرفته شده است که امتداد آن‌ها به سمت سرویس‌های ابری موجود را پیشنهاد می‌کند.
کلمات کلیدی: شبکه‌های حس‌گر بیسیم | ارتباطات زمان واقعی | مصرف توان کم.
مقاله ترجمه شده
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