Relevant bibliographies by topics / DW1000

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Academic literature on the topic 'DW1000'

Author: Grafiati
Published: 4 June 2021
Last updated: 5 February 2022

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Journal articles on the topic "DW1000"

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Yang, JingYi, and Ming Yan. "Implementation of UWB indoor location and distance measurement based on TOF algorithm." MATEC Web of Conferences 173 (2018): 03018. http://dx.doi.org/10.1051/matecconf/201817303018.

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In order to achieve indoor positioning, based on the distance positioning algorithm is essential, it designs a company using DecaWave DW1000 chip and STM32 embedded control chip using the TOF algorithm and ranging system, indoor location in wireless sensor network. The whole system is divided into hardware and software. The hardware part includes anchor nodes and node labels, set up node using DW1000 chip and STM32 chip combination, the software using C language to write the STM32 location algorithm and control information controller, complete data acquisition, transmission and processing functions, in order to get the node label and the anchor node distance.
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Cimdins, Marco, Sven Ole Schmidt, and Horst Hellbrück. "MAMPI-UWB—Multipath-Assisted Device-Free Localization with Magnitude and Phase Information with UWB Transceivers." Sensors 20, no. 24 (December 10, 2020): 7090. http://dx.doi.org/10.3390/s20247090.

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In this paper, we propose a multipath-assisted device-free localization (DFL) system that includes magnitude and phase information (MAMPI). The DFL system employs ultra-wideband (UWB) channel impulse response (CIR) measurements, enabling the extraction of several multipath components (MPCs) and thereby benefits from multipath propagation. We propose a radio propagation model that calculates the effect on the received signal based on the position of a person within a target area. Additionally, we propose a validated error model for the measurements and explain the creation of different feature vectors and extraction of the MPCs from Decawave DW1000 CIR measurements. We evaluate the system via simulations of the position error probability and a measurement setup in an indoor scenario. We compare the performance of MAMPI to a conventional DFL system based on four sensor nodes that measures radio signal strength values. The combination of the magnitude and phase differences for the feature vectors results in a position error probability that is comparable to a conventional system but requires only two sensor nodes.
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Van Baelen, Dries, Nicola Macoir, Quinten Van den Brande, Eli De Poorter, Sam Lemey, Jo Verhaevert, and Hendrik Rogier. "Fully Flexible Textile Antenna-Backed Sensor Node for Body-Worn UWB Localization." Sensors 21, no. 5 (February 26, 2021): 1641. http://dx.doi.org/10.3390/s21051641.

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A mechanically flexible textile antenna-backed sensor node is designed and manufactured, providing accurate personal localization functionality by application of Decawave’s DW1000 Impulse Radio Ultra-Wideband (IR-UWB) Integrated Circuit (IC). All components are mounted on a flexible polyimide foil, which is integrated on the backplane of a wearable cavity-backed slot antenna designed for IR-UWB localization in Channels 2 and 3 of the IEEE 802.15.4-2011 standard (3744 MHz–4742.4 MHz). The textile antenna’s radiation pattern is optimized to mitigate body effects and to minimize absorption by body tissues. Furthermore, its time-domain characteristics are measured to be adequate for localization. By combining the antenna and the bendable Printed Circuit Board (PCB), a mechanically supple sensor system is realized, for which the performance is validated by examining it as a node used in a complete localization system. This shows that six nodes around the body must be deployed to provide system coverage in all directions around the wearer. Even without using sleep mode functionalities, the measurements indicate that the system’s autonomy is 13.3 h on a 5 V 200 mAh battery. Hence, this system acts as a proof of concept for the joining of localization electronics and other sensors with a full-textile antenna into a mechanically flexible sensor system.
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Sakr, M., A. Masiero, and N. El-Sheimy. "EVALUATION OF DYNAMIC AD-HOC UWB INDOOR POSITIONING SYSTEM." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-1 (September 26, 2018): 379–85. http://dx.doi.org/10.5194/isprs-archives-xlii-1-379-2018.

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<p><strong>Abstract.</strong> Ultra-wideband (UWB) technology has witnessed tremendous development and advancement in the past few years. Currently available UWB transceivers can provide high-precision time-of-flight measurements which corresponds to range measurements with theoretical accuracy of few centimetres. Position estimation using range measurement is determined by measuring the ranges from a rover or a dynamic node, to a set of anchor points with known positions. However, building a flexible and accurate indoor positioning system requires more than just accurate range measurements. The performance of indoor positioning system is affected by the number and the configuration of the anchor points used, along with the accuracy of the anchor positions.</p><p>This paper introduces LocSpeck, a dynamic ad-hoc positioning system based on the DW1000 UWB transceiver from Decawave. LocSpeck is composed of a set of identical nodes communicating on a common RF channel, forming a fully or partially connected network where the positioning algorithm run on each node. Each LocSpeck node could act as an anchor or a rover, and the role could change dynamically during the same session. The number of nodes in the network could change dynamically, since the firmware of LocSpeck supports adding and removing nodes on-the-fly. The paper compares the performance of the LocSpeck system with commercially available off-the-shelf UWB positioning system. Different operating scenarios are considered when evaluating the performance of the system, including cases where collaboration between the two systems is considered.</p>
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Sakr, Mostafa, Andrea Masiero, and Naser El-Sheimy. "LocSpeck: A Collaborative and Distributed Positioning System for Asymmetric Nodes Based on UWB Ad-Hoc Network and Wi-Fi Fingerprinting." Sensors 20, no. 1 (December 21, 2019): 78. http://dx.doi.org/10.3390/s20010078.

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This paper presents LocSpeck, a collaborative and distributed indoor positioning system for dynamic nodes connected using an ad-hoc network, based on inter-node relative range measurements and Wi-Fi fingerprinting. The proposed system operates using peer-to-peer range measurements and does not need ultra-wideband (UWB) fixed anchor, nor it needs a predefined network topology. The nodes could be asymmetric in terms of the available sensors onboard, the computational resources, and the power capacity. This asymmetry adversely affects the positioning performance of the weaker nodes. Collaboration between different nodes is achieved through a distributed estimator without the need of a single centralized computing element. The ranging measurement component of the system is based on the DW1000 UWB transceiver chip from Decawave, which is attached to a set of smartphones equipped with asymmetric sensors. The distributed positioning filter fuses, locally on each node, the relative range measurements, the reading from the internal sensors, and the Wi-Fi received signal strength indicator (RSSI) readings to obtain an estimate of the position of each node. The described system does not depend on fixed UWB anchors and supports online addition and removal of nodes and dynamic node role assignment, either as an anchor or as a rover. The performance of the system is evaluated by real-world test scenarios using a set of four smartphones navigating an indoor environment on foot. The performance is compared to that of a commercial UWB-based system. The results presented in this paper show that weak mobile nodes, in terms of available positioning sensors, can benefit from collaboration with other nearby nodes.
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Van Herbruggen, Ben, Bart Jooris, Jen Rossey, Matteo Ridolfi, Nicola Macoir, Quinten Van den Brande, Sam Lemey, and Eli De Poorter. "Wi-PoS: A Low-Cost, Open Source Ultra-Wideband (UWB) Hardware Platform with Long Range Sub-GHz Backbone." Sensors 19, no. 7 (March 30, 2019): 1548. http://dx.doi.org/10.3390/s19071548.

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Ultra-wideband (UWB) localization is one of the most promising approaches for indoor localization due to its accurate positioning capabilities, immunity against multipath fading, and excellent resilience against narrowband interference. However, UWB researchers are currently limited by the small amount of feasible open source hardware that is publicly available. We developed a new open source hardware platform, Wi-PoS, for precise UWB localization based on Decawave’s DW1000 UWB transceiver with several unique features: support of both long-range sub-GHz and 2.4 GHz back-end communication between nodes, flexible interfacing with external UWB antennas, and an easy implementation of the MAC layer with the Time-Annotated Instruction Set Computer (TAISC) framework. Both hardware and software are open source and all parameters of the UWB ranging can be adjusted, calibrated, and analyzed. This paper explains the main specifications of the hardware platform, illustrates design decisions, and evaluates the performance of the board in terms of range, accuracy, and energy consumption. The accuracy of the ranging system was below 10 cm in an indoor lab environment at distances up to 5 m, and accuracy smaller than 5 cm was obtained at 50 and 75 m in an outdoor environment. A theoretical model was derived for predicting the path loss and the influence of the most important ground reflection. At the same time, the average energy consumption of the hardware was very low with only 81 mA for a tag node and 63 mA for the active anchor nodes, permitting the system to run for several days on a mobile battery pack and allowing easy and fast deployment on sites without an accessible power supply or backbone network. The UWB hardware platform demonstrated flexibility, easy installation, and low power consumption.
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Sheikh, Tahir, Zahoor Baba, Sadaf Iqbal, Basharat Hamid, Fehim J. Wani, M. Anwar Bhat, and Sheikh Suhail. "Unveiling the Efficiency of Psychrophillic Aporrectodea caliginosa in Deciphering the Nutrients from Dalweed and Cow Manure with Bio-Optimization of Coprolites." Sustainability 13, no. 10 (May 11, 2021): 5338. http://dx.doi.org/10.3390/su13105338.

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There is an immense demand for vermicomposting employing psychrophilic vermiculture (Aporrectodea caliginosa) for management of wastes under the Himalayan ecosystem. Dalweed (weeds from the world-famous urban Dal Lake) and cow manure (CM) are cheaply and abundantly available bio resources in Kashmir valley. Dalweed (DW), disposed of in the heart of the city, ascribes unpleasant effects on tourism and the natural ecosystem. Initial substrate mixtures of DW and CM with different ratios (CM100, DW100, CM80:DW20, CM60:DW40, CM40:DW60 and CM20:DW80) and castings harvested were analyzed for the following parameters: pH, TOC, TN, NO3- P, K, Fe, Zn, C:N, C:P, and C:S ratio. The results of a 56day study revealed in consistency and disparity towards the bio-optimization of coprolites depending upon the type of waste residue and mixture ratio used. Treatments with medium to low dalweed residues (CM60:DW40 followed by CM80:DW20) were found to be optimum and significantly primed chemical properties of castings using A. caligenosa. C:N, C:P, and C:S ratios showed a non-linear response with maximum decrease in C:N ratio by 35%, C:P ratio by 38% in CM100, and C:S ratio by 67% in DW100. Humification ratio, humification index, and percent humic acids were changed across all the treatments with the highest respective values of 21.33 ± 1.05, 11.33 ± 0.76, and 47.83 ± 0.76 for CM60:DW40. Results also showed that the earthworm population and biomass significantly increased with the highest respective increments of 57.53% and 74.88% in CM60:DW40 over initial values. Moreover, the highest number of cocoons (95.67 ± 1.17) were recorded within CM60:DW40 and the lowest in the control (43.33 ± 1.53). Dehydrogenase and fluorescein diacetate activities were inconsistent with the highest in CM40:DW60 (64.64%) and CM20:DW80 (63.54%) respectively over the initial substrates, while highest urease activity (74.40%) was observed from CM100. The results highlight the role of A. caliginosa in sustainable transformation of CM and DW with insightful, beneficial, and priming impacts on castings for its agronomic value.
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Xu, Xu, Wei Wang, Zhengyu Wang, Jianlu Lv, Xiaoju Xu, Jiawen Xu, Juanzhen Yang, et al. "DW14006 as a Direct AMPKα Activator Ameliorates Diabetic Peripheral Neuropathy in Mice." Diabetes 69, no. 9 (July 9, 2020): 1974–88. http://dx.doi.org/10.2337/db19-1084.

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Sheik, GouseBasha, AroobAbdullah Alhumaidy, AliIsmail Ali Abdel Raheim, ZeyadAbdullah Alzeyadi, and MohammedIbrahim AlGhonaim. "Taxonomic characterizations of soil Streptomyces cavourensis DW102 and its activity against fungal pathogens." Journal of Pharmacy And Bioallied Sciences 12, no. 4 (2020): 462. http://dx.doi.org/10.4103/jpbs.jpbs_304_20.

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Lv, Jianlu, Wei Wang, Xialin Zhu, Xiaoju Xu, Qiuying Yan, Jian Lu, Xiaofan Shi, et al. "DW14006 as a direct AMPKα1 activator improves pathology of AD model mice by regulating microglial phagocytosis and neuroinflammation." Brain, Behavior, and Immunity 90 (November 2020): 55–69. http://dx.doi.org/10.1016/j.bbi.2020.07.041.

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Dissertations / Theses on the topic "DW1000"

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Xu, K. (Ke). "Performance measurements of DW1000 implementing IEEE standard 802.15.4-2011 impulse radio ultra-wideband technology." Master's thesis, University of Oulu, 2016. http://urn.fi/URN:NBN:fi:oulu-201603171328.

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This thesis is about testing a system’s actual performance under the IEEE 802.15.4-2011 UWB specifications, with a compliant device DW1000. It is of great interest to test the synchronization ability of different preamble lengths, which are applied in the IEEE 802.15.4-2011 UWB standard. It is also urgent to know the system’s actual performance in a multipath propagation environment, since the IEEE 802.15.4-2011 UWB standard allows an energy detection (ED) receiver to take advantage of multipath propagation. Theory predicts that a long preamble length can offer better synchronization ability at long distances, and has a longer working range. On the other hand, a long preamble length requires a longer channel occupancy time and more power consumption. Thus, a long preamble may not be the optimal choice for working at short distances. The channel model of the IEEE 802.15.4-2011 UWB standard, which is based upon the Saleh-Valenzuela (S-V) model, can be regarded as block fading. Although multipath propagation can improve the system’s performance by increasing the SNR, the effects of block fading on the system must be taken into account as well. It is pointed out in various papers that the S-V model is precise in predicting a none-line-of-sight (NLOS) environment, while it is not precise in predicting a line-of-sight (LOS) environment. The results of the first part of the measurements show that longer preambles have longer working ranges. However, the longer preambles’ performance, in the term of the packet reception ratio, is not necessarily better than that of the shorter preambles. The results of the second part of the measurements show that the system can take advantage of multipath propagation. On the other hand, the system’s performance might become instable, due to block fading. The receiver and the transmitter will have difficulty in synchronization, if the channel impulse response changes too much within the unsynchronized time period. A longer preamble length tends to offer a longer stable working range. In addition, the path loss of the channel will suddenly increase and then decrease. This phenomenon of a sudden change in the path loss at a certain distance is quite similar to that of a narrowband system.
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Neri, Lorenzo. "Progetto e realizzazione di un sistema UWB per comunicazioni audio e dati a breve raggio." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/11559/.

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In questo elaborato si vuole studiare l’implementazione di un sistema di comunicazione dati e audio basato su segnali Ultra Wide Band (UWB). L’obiettivo del progetto è quindi quello di implementare un sistema di comunicazione punto-multi punto basato su UWB.
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Lipka, Radim. "Bezdrátový lokalizační modul s nízko-příkonovým firmware na bázi RTOS." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2020. http://www.nusl.cz/ntk/nusl-417256.

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This thesis focuses on the design and implementation of the wireless localization module, using UWB technology with emphases on low-power firmwre based on RTOS. Wireless localization is based on TDoA algorithm.  The resulting HW module is designed as a four layer PCB, based on MCU crf52832 (ARM Cortex M4) and UWB module DevaWave DW1000. Firmware is implemented using FreeRTOS with emphasis on low power consumption. For hardware implementation, Eagle CAD was used. Firmware is implemented in C and Assembly programming languages.
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Leixner, Martin. "Návrh paketového analyzátoru pro UWB pásmo dle standardu IEEE 802.15.4a." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-220630.

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The aim of this work is study the standard for wireless sensor networks IEEE 802.15.4a. Design and implementation of a packet analyzer for ultra wideband technology com- pliant with IEEE 802.15.4a standard. Integrate packet analyzer to inspection software Wireshark and implement dissector for view packets. Finally, analyze and evaluate the parameters of the proposed packet analyzer.
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Toll, Maria. "Wireless electrocardiogram based on ultra-wideband communications." Thesis, Uppsala universitet, Signaler och System, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-382015.

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The goal for this master thesis is to develop a prototype that uses ultra-wideband (UWB) communications to wirelessly transfer electrocardiogram (ECG) data from an ECG measurement unit to an Android device (smartphone or similar) which is used to process and display the ECG signals. The prototype should consist of two hardware nodes; (1) Node one having a ECG measurement unit (an AD8232 single lead heart rate monitor), an UWB communication module (a Decawave DWM1000 module) and a microcontroller (an Arduino DUE); and (2) Node two having an Android device (an Android smartphone), an UWB communication module (a Decawave DWM1000 module) and a microcontroller (an Arduino DUE). On Node one the AD8232 monitor for ECG measurements is connected to an analog input (with an analog to digital converter (ADC)) on the Arduino and the DWM1000 module is connected to the Arduino via serial peripheral interface (SPI). On Node two the DWM1000 is connected to the Arduino via SPI to receive ECG data from Node one, and the Arduino is connected to the smartphone through a serial USB cable with an USB on-the-go adapter to send the ECG data to the smartphone, where it is filtered and displayed with an Android application. The application has the potential to add, for example, ECG analysis for diagnosing heart activities with artificial intelligence (AI) and further transmit the ECG data for remote medical care. The Arduino is programmed in Arduino IDE (integrated development environment) to handle ECG measurements and UWB communications (transmitting and receiving ECG data), which is limited to a single UWB channel because of limitations of the DWM1000 module. The Android application is created using Android studio, and it can process (with a notch filter) and display 1-12 channel ECG. The prototype has been built and tested. The results show that a single lead ECG measurement can be sent via UWB communication to a smartphone to display in real time. Multiple data channels (1-12 analog inputs on the Arduino) can be multiplexed, transmitted and displayed in real time. This thesis concludes that UWB has huge development potential, and will likely be used for various wireless devices in the future.
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Conference papers on the topic "DW1000"

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Dotlic, Igor, Andrew Connell, Hang Ma, Jeff Clancy, and Michael McLaughlin. "Angle of arrival estimation using decawave DW1000 integrated circuits." In 2017 14th Workshop on Positioning, Navigation and Communications (WPNC). IEEE, 2017. http://dx.doi.org/10.1109/wpnc.2017.8250079.

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Djaja-Josko, Vitomir, Jerzy Kolakowski, and Jozef Modelski. "TDOA estimation using a pair of synchronized DW1000 based anchor nodes." In 2018 22nd International Microwave and Radar Conference (MIKON). IEEE, 2018. http://dx.doi.org/10.23919/mikon.2018.8405288.

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Pannuto, Pat, Benjamin Kempke, Bradford Campbell, and Prabal Dutta. "Indoor ultra wideband ranging samples from the DecaWave DW1000 including frequency and polarization diversity." In SenSys '18: The 16th ACM Conference on Embedded Networked Sensor Systems. New York, NY, USA: ACM, 2018. http://dx.doi.org/10.1145/3277868.3277874.

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Barbour, Robert H., Robert Quigley, and Avtar Panesar. "Investigations into Fuel Additive Induced Power Gain in the CEC F-98-08 DW10B Injector Fouling Engine Test." In SAE 2014 International Powertrain, Fuels & Lubricants Meeting. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2014. http://dx.doi.org/10.4271/2014-01-2721.

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