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  • IEEE Xplore  (15)
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  • 1
    In: IEEE Intelligent Systems, Nov-Dec, 2001, Vol.16(6), p.35(7)
    Description: An intelligent system, called geno2pheno, relies on information derived from the HIV genomic sequence to predict the virus's resistance . Geno2pheno uses decision tree classifiers and support vector machines to make its predictions.
    Keywords: Hiv Tests -- Research ; Biomedical Engineering -- Research ; Genomics -- Research
    ISSN: 1541-1672
    E-ISSN: 19411294
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  • 2
    Language: English
    In: IEEE Access, 2018, Vol.6, pp.54355-54368
    Description: Highly accurate indoor localization based on significantly low complex infrastructure has recently gained great interest for a variety of innovative location-based applications. In this regards, the chipless radio frequency identification (RFID) system is presented to be the low-cost solution, while time-based ranging using the ultrawide-band spectrum is promising to offer precise ranging capability. However, the current wide-band systems suffer from the spectrum and power limitations, which restrict the function of chipless RFID-based localization systems. Therefore, we propose terahertz (THz)-based chipless RFID localization system that enables a smart object localizing itself using the infrastructure composed from reference chipless tags. In more details, THz band offers huge bandwidth providing superior-resolution localization and large coding capacity. Moreover, we utilize the combination between dielectric resonator (DR) and lens to be designed as a frequency-coded chipless tag, where this combination increases the radar cross section of the chipless tags and, hence, extends their coverage zone. This cost-efficient design of the tag enables the dense deployment of low-cost infrastructure acting as reference anchors. Furthermore, we investigate the link budget of the proposed system in order to characterize the tag and distance-dependent spectral windows that are feasible for RFID-based localization. Afterward, the time-domain backscattered signal from a DR-Lens tag is analyzed in order to perform ranging and to calculate the relative distances between the DR-Lens tags and the reader leading to determining the reader position. Measurements are performed to prove the concept of the DR-Lens tag, while the numerical simulation is conducted to evaluate the proposed localization system. Simulation results show that the proposed system can reach superior accuracy of millimeter-levels.
    Keywords: Radiofrequency Identification ; Distance Measurement ; Bandwidth ; Backscatter ; Lenses ; Resonant Frequency ; Indoor Environments ; Localization ; Rfid ; Large-Scale Mimo ; Chipless Rfid ; Dielectric Resonator (Dr) ; Lens ; Rtof ; Estimation Accuracy ; Engineering
    E-ISSN: 2169-3536
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  • 3
    Language: English
    In: 2015 IEEE International Conference on Communications (ICC), June 2015, pp.734-739
    Description: Narrowband noise (NBN) and periodic impulsive noise (PIN) are two of the most disturbing interferers in low-voltage (LV) power line communication (PLC). They exist commonly in different scenarios and degrade the performance of PLC systems significantly. Accurate estimation of the NBN and the PIN are important for the power line channel characterization and can help improve the quality of service (QoS). In contrast to other noise classes, both NBN and PIN may exhibit strong cyclic behaviors. In this work, the cyclic properties of both of them are investigated. Based on the results, an universal algorithm is developed to detect and cancel narrowband and periodic impulsive components from PLC signals. The proposed method is executed purely on the physical layer and does not require specialized hardware. Its performance is verified through simulations and real measurements.
    Keywords: Integrated Circuits ; Estimation ; Noise Measurement ; Switches ; Fluorescence ; Power Line Communication ; Periodic Impulsive Noise ; Narrowband Noise ; Cyclostationarity ; Parametric Signal Estimation ; Engineering
    ISSN: 1550-3607
    E-ISSN: 1938-1883
    Source: IEEE Conference Publications
    Source: IEEE Xplore
    Source: IEEE Journals & Magazines 
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  • 4
    Language: English
    In: 2017 IEEE International Symposium on Power Line Communications and its Applications (ISPLC), 2017, pp.1-6
    Description: Non-stationary, non-Gaussian noise severely limits the performance of narrowband (NB) power line communication (PLC) systems. Due to the periodic mains voltage, substantial parts of the noise are known to show time-periodic features. Exploiting these features can significantly improve noise canceling methods and thus the overall performance of PLC systems. A prerequisite for this is an accurate estimation of the statistical properties of the power line noise which is also an important part of the channel characterization. In this work, we perform a spectral correlation analysis to evaluate the strongest cyclic frequencies of the noise encountered in low-voltage NB-PLC applications. Our analysis is based on time-synchronized noise measurements at five different locations with a total observation time of 24 hours. Our contribution includes the implementation and estimation of the cyclic coherence function up to 500 kHz, the extraction of the strongest cyclic frequencies, as well as a short- and long-term analysis of the cyclic features. Finally, we present a statistical analysis of the cyclic frequencies based on the complete set of measurements. This analysis shows that cyclostationarity can be observed in the complete NB frequency range and confirms that the dominant cyclic frequency is twice the mains voltage frequency.
    Keywords: Time-Frequency Analysis ; Noise Measurement ; Time Measurement ; Switches
    Source: IEEE Conference Publications
    Source: IEEE Xplore
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  • 5
    Language: English
    In: 2018 IEEE International Symposium on Power Line Communications and its Applications (ISPLC), April 2018, pp.1-6
    Description: This paper considers an adaptive orthogonal frequency-division multiplexing (OFDM) transmission scheme for narrowband (NB) power line communication (PLC). The NB PLC channel is found to show strong cyclostationary characteristics due to the periodic mains voltage. However, conventional systems do not use these time-varying channel features. An improvement of the performance is achieved by exploiting the cyclic properties of the channel. Therefore, adaptive bit and power loading methods are of great interest for PLC. In this work, we will evaluate a cyclic loading method for an OFDM system in the CENELEC A-band. Our analysis is based on noise measurements at three different locations over an observation time of 23 hours. Our contribution includes an OFDM system model comprising both additive noise and channel attenuation. Furthermore, we present a method for limiting the amplitude and power spectral density to comply with narrowband regulations. In conclusion, our proposed method achieves a lower bit error rate at all locations. The improvement reaches up to a 10〈sup〉2〈/sup〉 times lower bit error rate compared to non-adaptive carrier allocation at the same data rate.
    Keywords: Ofdm ; Loading ; Power Line Communications ; Load Modeling ; Estimation ; Receivers ; Channel Estimation
    Source: IEEE Conference Publications
    Source: IEEE Xplore
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  • 6
    Language: English
    In: 2010 Conference Proceedings ICECom, 20th International Conference on Applied Electromagnetics and Communications, September 2010, pp.1-3
    Description: Thin film deposition based on plasma CVD processes are well known for many years. While these processes mainly drove the miniaturization of wafer based micro electronics, the upscale was for a long time of minor interest. With the increasing activations in photovoltaic devices or flat panel displays, the homogeneous large area deposition became more important. This paper will contribute to handle large area and high rate deposition with plasma CVD based on a linear plasma line concept with microwave excitation. The lines are arranged in a lateral extended plasma source and the first experience in deposition is introduced.
    Keywords: Plasmas ; Substrates ; Vacuum Technology ; Elementary Particle Vacuum ; Microwave Technology
    ISBN: 9781612849980
    ISBN: 1612849989
    Source: IEEE Conference Publications
    Source: IEEE Xplore
    Source: IEEE Journals & Magazines 
    Source: IEEE eBooks
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  • 7
    Language: English
    In: 2013 IEEE 14th International Symposium on "A World of Wireless, Mobile and Multimedia Networks" (WoWMoM), June 2013, pp.1-6
    Description: A plethora of (secure) routing protocols exists for wireless multihop networks. These protocols are mostly tailored to meet the performance and security requirements of specific application scenarios. As a result, the protocols cannot easily be adapted to novel application demands, organically growing networks, etc. We argue that the modular design of routing protocols and security mechanisms can remove the key limitations of today's monolithic routing protocols. We show the feasibility of a modular routing approach for wireless multihop networks using the example of a wireless mesh network. In particular, we demonstrate that a dynamic switch between protocol modules is possible at runtime by means of simulation as well as testbed experimentation. We further demonstrate that the security associations and the key material can be reutilized for bootstrapping novel protocol modules, thus minimizing the control overhead.
    Keywords: Routing Protocols ; Switches ; Routing ; Cryptography ; Delays ; Wireless Mesh Networks ; Mobile Ad Hoc Networks ; Secure Routing ; Modular Routing Protocols ; State Transition ; Computer Science
    ISBN: 9781467358279
    ISBN: 1467358274
    Source: IEEE Conference Publications
    Source: IEEE Xplore
    Source: IEEE Journals & Magazines 
    Source: IEEE eBooks
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  • 8
    Language: English
    In: 2015 European Microelectronics Packaging Conference (EMPC), September 2015, pp.1-6
    Description: The quality of molded electronic packages is strongly influenced by material characteristics of epoxy molding compound (EMC) and transfer molding process parameters. This work comprises the understanding of the effects of individual process parameters on the failure mechanisms and the evaluation of suitability of the online cure monitoring technique to observe the variations in material characteristic for transfer molding process. Molding temperature, preheat time, holding pressure as well as transfer speed are selected as process parameters. The effect of these process parameters on void formation and wire sweep is analyzed. Dielectric Analysis (DEA) is chosen as an in-situ technique and the suitability of the DEA is assessed for monitoring the cure behavior of the EMC regarding different variables. The effects of cure temperature, storage duration, moisture and material batch differences on the dielectric signal are studied and the variations on the ion viscosity and the cure behavior of EMC are discussed.
    Keywords: Wires ; Transfer Molding ; Electromagnetic Compatibility ; Temperature Measurement ; Logic Gates ; Temperature ; Temperature Sensors
    Source: IEEE Conference Publications
    Source: IEEE Xplore
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  • 9
    Language: English
    In: 2018 11th German Microwave Conference (GeMiC), March 2018, pp.267-270
    Description: In this work, we study dielectric resonator (DR) tag based localization using time difference of arrival (TDOA) method in indoor environments. DRs, which act as chipless tags, are used as reference nodes in order to localize an object equipped with a reader. The ringing behavior of the DR tags is utilized as the fingerprint of the tags, which is used to estimate TDOA using the cross-correlation algorithm. Simulations and measurements are performed to examine the performance of the proposed DR tags and the localization algorithm.
    Keywords: Resonant Frequency ; Radiofrequency Identification ; Dielectrics ; Scattering ; Q-Factor ; Antenna Measurements ; Distance Measurement ; Localization ; Chipless Tag ; Dielectric Resonator ; Tdoa
    Source: IEEE Conference Publications
    Source: IEEE Xplore
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  • 10
    Language: English
    In: 2016 IEEE 66th Electronic Components and Technology Conference (ECTC), May 2016, pp.714-721
    Description: The quality of smart power modules strongly depends on the material characteristics of epoxy molding compound (EMC) and transfer molding process parameters. In order to predict the quality and to diminish the failure mechanisms, inline monitoring techniques in transfer molding process are essential. This work examines the inline identification of the variations in the EMC characteristics in the transfer molding process. Dielectric Analysis (DEA) is chosen as an inline technique and the influence of prolonged storage duration, moisture content and batch-to-batch variation on the characteristics of EMC are studied. In addition, the impact of molding temperature on the cure behavior of the EMC is in-situ examined. DEA results are verified and compared with the rheological and calorimetric analysis and good correlation is established.
    Keywords: Electromagnetic Compatibility ; Transfer Molding ; Viscosity ; Temperature Measurement ; Temperature Sensors ; Ions ; Monitoring ; Epoxy Molding Compounds ; Transfer Molding Process ; Dielectric Analysis ; Smart Power Modules
    ISBN: 9781509012039
    ISSN: 05695503
    Source: IEEE Conference Publications
    Source: IEEE Xplore
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