- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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A Residual Phase Noise Compensation Method for IEEE 802.15.4 Compliant Dual-Mode Receiver for Diverse Low Power IoT Applications
摘要： The Internet of Things with its plethora of applications brings up new challenges in optimizing power consumption, error performance, latency and throughput in its communication devices. Recently, there has been increasing necessity of re-configurable and multi-standard transceivers in order to bring adaptability in the IoT devices to suit the nature of the application and satisfy the aforementioned performance metrics as well. In this work, we focus on the efficient design of receivers compliant with IEEE 802.15.4 which is a prominent protocol for low power IoT applications. We propose a robust phase noise compensation method which efficiently removes the residual phase noise remaining after the coarse frequency offset compensation due to direct-sequence spread spectrum operation on large packets. We also propose a dual-mode receiver using the proposed compensation method and showcase its ability to cater to the diverse nature of IoT applications. The detailed architecture of proposed dual-mode receiver is presented along with its FPGA prototyping and ASIC implementation. We have analyzed overall power consumption by the proposed dual-mode receiver considering the packet error rate and retransmission scenario. The results show that the proposed receiver saves significant energy consumption by changing its mode in favorable channel environments.
关键词： IEEE 802.15.4,IoT,dual-mode receiver,hardware architecture,phase noise cancellation,frequency and phase offset compensator,Digital baseband receiver
更新于2025-09-09 09:28:46
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[IEEE 2018 International Symposium on Electromagnetic Compatibility (EMC EUROPE) - Amsterdam (2018.8.27-2018.8.30)] 2018 International Symposium on Electromagnetic Compatibility (EMC EUROPE) - Optical TEMPEST
摘要： Research on optical TEMPEST has moved forward since 2002 when the ?rst pair of papers on the subject emerged independently and from widely separated locations in the world within a week of each other. Since that time, vulnerabilities have evolved along with systems, and several new threat vectors have consequently appeared. Although the supply chain ecosystem of Ethernet has reduced the vulnerability of billions of devices through use of standardised PHY solutions, other recent trends including the Internet of Things (IoT) in both industrial settings and the general population, High Frequency Trading (HFT) in the ?nancial sector, the European General Data Protection Regulation (GDPR), and inexpensive drones have made it relevant again for consideration in the design of new products for privacy. One of the general principles of security is that vulnerabilities, once ?xed, sometimes do not stay that way.
关键词： vulnerabilities,privacy,Ethernet,GDPR,IoT,optical TEMPEST,security,HFT
更新于2025-09-09 09:28:46
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[IEEE 2018 International Conference on Advances in Computing, Communications and Informatics (ICACCI) - Bangalore, India (2018.9.19-2018.9.22)] 2018 International Conference on Advances in Computing, Communications and Informatics (ICACCI) - Pulse Oximetry and IOT based Cardiac Monitoring Integrated Alert System
摘要： Heart-related diseases are the leading cause of mortality around the world. There is a substantial need for continuous monitoring of cardiac values as they are a very significant index of one’s health. Conventional methods of measuring heart rate, spo2, and blood pressure values are laborious, prone to errors and usually requires the presence of a physician. This makes nocturnal monitoring impossible. In this project, we offer a modern day, embedded Systems & IoT based solution for continuous and non-invasive measuring of the cardiac values using an upcoming technology known as pulse-oximetry. This technology uses a medical sensor creating a photoplethsmogram from which we can detect the oxygen saturation level and variations in blood volume in the tissues. This analog waveform is further processed using hardware filters to obtain heart rate and Sp02 values. These values are digitized using the A2D converters in the ATmega32 based SoC and are constantly stored and uploaded to the cloud. In case the cardiac values are found to deviate away from the set thresholds, an automated emergency alert system is triggered which uses GSM for automated SOS calls, GPS to track the patient's location and GPRS to make the system truly mobile and wireless. Also, a patient can self-trigger the same alert system by using Google voice assistant on their smart-phone. The end goal of this project is to make a wearable cardiac monitoring and alert system which can be generic or patient specific and help reduce heart-related accidents.
关键词： Photoplethsmogram (PPG),pulse oximeter,GPRS,cardiac parameters: heart rate, sp02,GSM,GPS,Internet of Things (IoT),SoC,OPAMP,wearable health care device
更新于2025-09-09 09:28:46
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[IEEE 2018 International Conference on Advances in Computing, Communications and Informatics (ICACCI) - Bangalore, India (2018.9.19-2018.9.22)] 2018 International Conference on Advances in Computing, Communications and Informatics (ICACCI) - Effects of Memristors on Fully Differential Transimpedance Amplifier Performance
摘要： The progress of the Internet of Things(IoT) technologies and applications requires the ef?cient low power circuits and architectures to maintain and improve the performance of the increasingly growing data processing systems. Memristive circuits and substitution of energy-consuming devices with memristors is a promising solution to reduce on-chip area and power dissipation of the architectures. In this paper, we proposed a CMOS-memristive fully differential transimpedance ampli?er and assess the impact of memristors on the ampli?er performance. The fully differential ampli?ers were simulated using 180nm CMOS technology and have 5.3-23MHz bandwidths and 2.3-5.7k? transimpedance gains with a 1pF load. We compare the memristor based ampli?er with conventional architecture. The gain, frequency response, linear range, power consumption, area, total harmonic distortion and performance variations with temperature are reported.
关键词： transimpedance ampli?er,fully differential,180nm CMOS,IoT,memristor
更新于2025-09-09 09:28:46
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[IEEE 2018 20th International Conference on Transparent Optical Networks (ICTON) - Bucharest (2018.7.1-2018.7.5)] 2018 20th International Conference on Transparent Optical Networks (ICTON) - Energy Efficient Service Distribution in Internet of Things
摘要： The Internet of Things (IoT) networks are expected to involve myriad of devices, ranging from simple sensors to powerful single board computers and smart phones. The great advancement in computational power of embedded technologies have enabled the integration of these devices into the IoT network, allowing for cloud functionalities to be extended near to the source of data. In this paper we study a multi-layer distributed IoT architecture supported by fog and cloud. We optimize the placement of the IoT services in this architecture so that the total power consumption is minimized. Our results show that, introducing local computation at the IoT layer can bring up to 90% power savings compared with general purpose servers in a central cloud.
关键词： MILP,IoT,fog,service distribution,cloud,edge
更新于2025-09-09 09:28:46
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[IEEE 2018 International Conference on Information and Communication Technology Convergence (ICTC) - Jeju Island, Korea (South) (2018.10.17-2018.10.19)] 2018 International Conference on Information and Communication Technology Convergence (ICTC) - IoT lighting address scheme and profile API design for interoperability
摘要： As IoT becomes a hot topic, IoT lighting that can be controlled remotely by smartphones or internet is expanding. Because lighting suppliers are using proprietary CMS and proprietary lighting protocols or existing lighting protocols, interoperability is becoming an important issue when applying IoT lighting. In this paper, we designed the address scheme and profile API and applied it to support interoperability even if IoT lighting and CMS are made by other vendors. In addition, the designed address scheme and profile APIs can be used to support energy savings, user friendliness, control diversity, IoT lighting status consistency and automated maintenance. We have proved that existing lighting and IoT lighting can interoperate by interworking with control devices developed by different companies and five kinds of gateways.
关键词： IoT lighting,IoT Interoperability,profile,API,address scheme,smart lighting
更新于2025-09-04 15:30:14
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Using IoT and smart monitoring devices to optimize the efficiency of large-scale distributed solar farms
摘要： This paper presents a novel IoT-based architecture that utilizes IoT hardware, software, and communication technologies to enable real-time monitoring and management of solar photovoltaic systems at large scales. The system enables stakeholders to remotely control and monitor the photovoltaic systems and evaluate the effect of various environmental factors such as weather, air quality, and soiling. The system was implemented and evaluated in terms of network delay and resource consumption. Message Queueing Telemetry Transport (MQTT) was used to facilitate wide-scale real-time communication. The average network delay was found to be less than 1 s, proving the architecture to be ideal for solar and smart grid monitoring systems. As for resource consumption, the evaluation showed the hardware to consume about 3% of the panel’s output, while the application also utilized a very small percentage of the CPU. This led to the conclusion that the proposed architecture is best deployed using low-cost constrained edge devices where a combination of IoT-based paradigm, efficient MQTT communication, and low resources consumption makes the system cost-effective and scalable.
关键词： Solar photovoltaic monitoring,Smart renewable energy,IoT,Smart grid
更新于2025-09-04 15:30:14
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[Institution of Engineering and Technology 12th European Conference on Antennas and Propagation (EuCAP 2018) - London, UK (9-13 April 2018)] 12th European Conference on Antennas and Propagation (EuCAP 2018) - Propagation measurements for device-to-device communication in forest terrain
摘要： In this paper, we present a measurement campaign conducted in forest terrain with focus on path-loss. The aim of the measurement campaign is to study the coverage in a Device-to-Device (D2D) communication scenario. The measurement campaign was conducted in the LTE band 8 at 917.5 MHz with measurement ranges extending to more than 2.5 km. The measurements have been conducted using a purpose-developed measurement system with a dynamic range of 180 dB. The measurements showed that a D2D system with transmit and receive antenna at heights of 1.5 m could achieve a range of approximately 2 km using the 164 dB path-loss limit speci?ed for Narrow Band Internet-of-Things (NB-IoT).
关键词： NB-IoT,Forest,D2D,path loss,Device-to-Device
更新于2025-09-04 15:30:14
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[Institution of Engineering and Technology 12th European Conference on Antennas and Propagation (EuCAP 2018) - London, UK (9-13 April 2018)] 12th European Conference on Antennas and Propagation (EuCAP 2018) - Finger Ring Phased Antenna Array for 5G IoT and Sensor Networks at 28 GHz
摘要： In this paper, a circular phased antenna array has been constructed on the finger ring for the 28 GHz 5G communication systems. The antenna array has been verified in free space and with user’s hand phantom on three fingers by the simulations. It has been found that such antenna structure is resilient towards the user effects and has a stable coverage efficiency characteristics. The coverage efficiency of 80 % with the realized gain of 5 dBi has been observed when the ring simulated with the user’s hand. The correlation between high power loss density with antenna de-tuning has also been observed.
关键词： 5G,Wearable Antennas,Sensor Networks,28 GHz,Phased Array,IoT,Finger Ring Antenna,User effects,Antennas
更新于2025-09-04 15:30:14
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[IEEE 48th European Solid-State Device Research Conference (ESSDERC 2018) - Dresden (2018.9.3-2018.9.6)] 2018 48th European Solid-State Device Research Conference (ESSDERC) - Smart Connected Sensors - Enablers for the IoT
摘要： The Internet of Things (IoT) is all about making life simpler and more exciting for consumers by interconnecting the world around them. But how can this promise of the IoT be fulfilled? In the world of IoT, microelectromechanical systems (MEMS) sensors form the backbone of the interface between the user and the multitudes of devices that surround us, such as smartphones, wearables, robots and drones. However, making devices able to sense and be connected is simply not enough to realize the grand promise of the IoT. The fact remains, that IoT will only be successful if it follows a user-centric approach, i.e. by solving real-life everyday challenges, making life simpler, enhancing ease of use. Furthermore, ubiquitous sensing of everything on all manner of devices in an ever-increasing number of complex environments poses definite and growing challenges for sensor providers. On ASIC and MEMS development level, these challenges do translate to a significant spread of requirements for multi-platform application approaches by enhancing classical key performance indicators as very high signal evaluation performance or ultra-low power consumption on one side, but also adding new architectures for smart sensor signal fusion or connectivity in arbitrary application use modes on the other side. The continuing rise of complexity due to future IoT market requirements lead to even stronger demand for “first time right” design methodologies in general, and more powerful and effective verification methodologies in particular.
关键词： MEMS sensors,smart connected sensors,connectivity,user-centric approach,signal fusion,IoT,ASIC
更新于2025-09-04 15:30:14