The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In this paper, a Space-Time Block Code (STBC) based on the Golden number, Golden code is proposed for a massive MIMO-RFID systems. Based on channel modelling for massive MIMO-RFID system, the proposed space-time code is applied to the tag side. Simulation results show that the proposed code for massive MIMO-RFID systems outperforms Alamouti code while simplifying the receiver's complexity. The Bit...
This work presents two completely printable chipless RFID tags for low-cost item labeling. The first developed tag is based on circular ring resonators where each resonator codifies a tag coding notch position. Therefore, the tag structure is scalable, printable and compact size. Moreover, a novel encoding methodology is employed to preserve the notch width and position while coding. The second developed...
Notch identification is a major challenge in Frequency Coded (FC) chipless RFID. The main objective of this contribution is to introduce three signal processing techniques for notch identification and detection. The three algorithms are Matched Filter(MF), Window Based- Singular Value Decomposition (WB-SVD) and Dynamic Time Warping (DTW). The algorithms should be able to detect both notch bandwidth...
Channel state information (CSI) acquisition is a crucial issue in downlink FDD-based massive multi-input multioutput (MIMO) networks, where the channel reciprocity is not applicable. Thus, users are expected to feedback the bestmatch quantized channels to serving transmitters. Hence, an extensively large size of the feedback overhead is needed, which is linearly scaled at each user with the number...
The main objective of this contribution is to introduce a novel technique for reducing the time taken from the reader to identify the Frequency Coded (FC) chipless RFID tags existed in the reader's interrogation region, system latency. The frequency scanning methodology, number of averaging for clutter removal and hop duration are the three main parameters that significantly affect the overall system...
This paper discusses the idea of merging massive Multiple Input Multiple Output (mMIMO) technology into backscatter radio communication systems. Specifically, we consider a passive — battery-less — Radio Frequency IDentification (RFID) system. The paper provides a mathematical framework for channel modelling of mMIMO-RFID system including the effect of large scale fading on the communication process...
This work proposes the utilization of the Reflect Array (RA) antenna in the reader of the Frequency Coded (FC) chipless RFID systems aiming at increasing the reading range, minimizing the environmental reflections and acquiring a lot of novel capabilities that can not be provided by the conventional antenna systems. The FC chipless RFID system requires an UWB range of frequencies to accommodate multiple...
The main objective of this contribution is to introduce a novel multi-tag anti-collision protocol based on Look-Up-Table (LUT) scheme. The proposed protocol includes an enhancement for the spectrum utilization and coding capacity. This is accomplished by transferring the tag-ID to be stored in a table in the main memory of the reader (look-up-table). Moreover, the unique signature of each tag represents...
In this paper a frequency coded chipless RFID localization algorithm is proposed. Unlike other techniques, one reader with multiple antennas is used to interrogate, identify and localize the tag. The Received Signal Strength (RSS) technique is used to detect the range of the tag, while Matrix Pencil Method (MPM) is used to calculate the Angle of Arrival (AoA). To validate both techniques a ray tracing...
Hybrid analog-digital beamforming is a well-known cost-efficient signal processing method for massive MIMO systems. In this paper, we propose a hybrid beamforming massive MIMO system based on Rotman lens analog beamforming with beam selection and digital beamforming. Rotman lens is a true-time delay analog beamforming network supporting wide bandwidth signals, which is thus more attractive than the...
As recommended by 5th generation Public-Private Partnership (5G-PPP) and Next Generation Mobile Networks (NGMN), one of the most important 5G requirements is to minimize the delay within the network for delay-sensitive services. Main objective of this work is to exploit massive MIMO technology to reduce Hybrid Automatic Repeat Query (HARQ) retransmission delay. Massive MIMO indoor environment is created...
Noise estimation is an essential issue on the wireless communication system. Cognitive radio network uses the spectrum sensing to detect opportunistically the unoccupied spectrum holes and the licensed user. Several methods of spectrum sensing need the knowledge of noise power in advance. In this paper, we proposed noise power estimation that suitable for the condition of cognitive radio. The estimator...
This paper presents a concept of subarray antenna selection in massive MIMO systems, i.e., the whole antenna array is segmented into subarrays and only one antenna is selected in each subarray. The subarray antenna selection can reduce the hardware complexity of the RF switching network, but at the cost of performance degradation due to the introduced selection constraint. We evaluate such performance...
Die Umsetzung eines funktionsfähigen Risikomanagementprozesses wie in Kapitel 4 dargestellt, erfordert die Entwicklung von Methoden und Verfahren, die organisatorisch und DV-technisch in die Bank integriert werden müssen. Auch wenn sich diese Methoden und Verfahren teilweise sehr deutlich in ihrer Konzeption und Umsetzung in einzelnen Banken unterscheiden, können alle vorzufindenden Ansätze in der...
Erhebliche realisierte Verluste (Barings, Orange County etc.) haben das Gebiet „Operational Risk“ bzw. „Operationelle Risiken“ (teilweise nicht immer synonym auch als „Betriebsrisiken“, „Operative Risiken“ bzw. „Operationale Risiken“, oft kurz auch als „OpRisk“ bezeichnet) sowohl in Finanzinstituten als auch bei der Bankenaufsicht etwa seit Mitte der 1990er Jahre in den Fokus gerückt (siehe hierzu...
Der Prozess des Managements Operationeller Risiken basiert strukturell auf den gleichen Schritten wie im Falle von Markt- und Kreditrisiken. Besonderheiten der Operationellen Risiken, vor allem die Tatsache, dass sie nicht auf bestimmte organisatorische Einheiten konzentriert werden können, wie zum Beispiel Marktrisiko im Handelsbereich oder Aktiv-Passiv-Management, sowie ihre durch die Definition...
Eine Vielzahl von Gründen hat Finanzinstitute, insbesondere Banken, dazu veranlasst, sich intensiv mit dem Thema Operationelle Risiken zu beschäftigen. Einerseits gehören hierzu betriebswirtschaftliche Überlegungen, andererseits regulatorische Rahmenbedingungen. Während die ersten Banken, die vor ca. zehn Jahren erste Versuche unternommen haben, das Thema innerhalb ihres Risikomanagements zu etablieren,...
Die konsequente Umsetzung eines umfassenden Instrumentariums zum Management und Controlling Operationeller Risiken führt zu bedeutenden Änderungen im operativen und — wenn nicht unmittelbar dann zumindest mittelfristig — auch im strategischen Bankgeschäft. Aktuelle Diskussionen zeigen, dass die inhaltliche, insbesondere die quantitative und IT-technische Dimension tendenziell überschätzt, die organisatorische...
Für Markt- und Kreditrisiken sind in den meisten Banken seit einigen Jahren entsprechende Organisationsstrukturen und Risikomanagementprozesse etabliert worden. Ein analoger Ansatz für Operationelle Risiken ist in meisten Häusern noch im Aufbau begriffen.
Die Implementierung eines vollständigen Frameworks für das Management Operationeller Risiken ist von vielen, zumeist institutsspezifischen Aspekten abhängig. Wesentlich sind dabei sind: Ausgangsvoraussetzungen: Organisationsstruktur und Komplexität des Finanzinstitutes, bereits vorhandene Elemente des Risikomanagementprozesses und Risikokultur, vorhandene IT-Umgebung. ...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.