• Ultra Low-Power Analog Median Filters 

  Diaz-Sanchez, Alejandro; Lemus-Lopez, Javier; Rocha Perez, Jose Miguel; Ramirez-Angulo, Jaime; Molinar Solis, Jesus Ezequiel; Vazquez-Leal, Hector (Společnost pro radioelektronické inženýrství, 2013-09)

  The design and implementation of three analog median filter topologies, whose transistors operate in the deep weak-inversion region, is described. The first topology is a differential pairs array, in which drain currents ...

• A Powerful Optimization Tool for Analog Integrated Circuits Design 

  Kubar, Miloslav; Jakovenko, Jiri (Společnost pro radioelektronické inženýrství, 2013-09)

  This paper presents a new optimization tool for analog circuit design. Proposed tool is based on the robust version of the differential evolution optimization method. Corners of technology, temperature, voltage and current ...

• A Novel (DDCC-SFG)-Based Systematic Design Technique of Active Filters 

  Fakhfakh, Mourad; Pierzchala, Marian (Společnost pro radioelektronické inženýrství, 2013-09)

  This paper proposes a novel idea for the synthesis of active filters that is based on the use of signal-flow graph (SFG) stamps of differential difference current conveyors (DDCCs). On the basis of an RLC passive network ...

• A Novel Electronically Controllable of Current-mode Level Shifted Multicarrier PWM Based on MO-CFTA 

  Kongnun, Weerapon; Aurasopon, Apinan (Společnost pro radioelektronické inženýrství, 2013-09)

  This paper proposes the application of an electronically controlled current-mode for a level shifted multicarrier PWM generator. The proposed circuit consists of two multiple-output current follower transconductance ...

• Novel Resistorless Mixed-Mode PID Controller with Improved Low-Frequency Performance 

  Silaruam, Vinai; Lorsawatsiri, Anuree; Wongtaychatham, Chariya (Společnost pro radioelektronické inženýrství, 2013-09)

  This paper introduces a new resistorless mixed-mode proportional-integral-derivative (PID) controller. It employs six simple transconductors and only two grounded capacitors. The proposed PID controller offers several ...

• Segmentation of Sedimentary Grain in Electron Microscopy Image 

  Krupka, Ales; Riha, Kamil; Krizova, Lenka (Společnost pro radioelektronické inženýrství, 2013-09)

  This paper describes a novel method developed for the segmentation of sedimentary grains in electron microscopy images. The algorithm utilizes the approach of region splitting and merging. In the splitting stage, the ...

• Cost-Efficient Development of Acoustic Models for Speech Recognition of Related Languages 

  Nouza, Jan; Cerva, Petr; Kucharova, Michaela (Společnost pro radioelektronické inženýrství, 2013-09)

  When adapting an existing speech recognition system to a new language, major development costs are associated with the creation of an appropriate acoustic model (AM). For its training, a certain amount of recorded and ...

• A Separation Algorithm for Sources with Temporal Structure Only Using Second-order Statistics 

  Wang, Jiangong; Shen, Yuehong; Li, Hui; Wei, Hongyan; Xu, Shiming (Společnost pro radioelektronické inženýrství, 2013-09)

  Unlike conventional blind source separation (BSS) deals with independent identically distributed (i.i.d.) sources, this paper addresses the separation from mixtures of sources with temporal structure, such as linear ...

• A New CMOS Current-Mode Folding Amplifier 

  Al-Absi, Munir A.; Mahemood, Shaker A.; Abuelma'atti, Muhammad T. (Společnost pro radioelektronické inženýrství, 2013-09)

  In this paper, a new CMOS current-mode folding amplifier is proposed. The circuit is designed using MOSFETs operating in strong inversion. The design produces a nearly ideal saw-tooth input-output characteristic which is ...

• Electronic Nose Odor Classification with Advanced Decision Tree Structures 

  Guney, Selda; Atasoy, Ayten; Burget, Radim (Společnost pro radioelektronické inženýrství, 2013-09)

  Electronic nose (e-nose) is an electronic device which can measure chemical compounds in air and consequently classify different odors. In this paper, an e-nose device consisting of 8 different gas sensors was designed and ...

• A Compressed Sensing-Based Low-Density Parity-Check Real-Number Code 

  He, Zaixing; Ogawa, Takahiro; Haseyama, Miki; Zhao, Xinyue; Zhang, Shuyou (Společnost pro radioelektronické inženýrství, 2013-09)

  In this paper, we propose a novel low-density parity-check real-number code, based on compressed sensing. A real-valued message is encoded by a coding matrix (with more rows than columns) and transmitted over an erroneous ...

• An Efficient Sparse Representation Algorithm for Direction-of-Arrival Estimation 

  Sun, Lei; Wang, Huali; Xu, Guangjie (Společnost pro radioelektronické inženýrství, 2013-09)

  This paper presents an efficient sparse representation approach to direction-of-arrival (DOA) estimation using uniform linear arrays. The proposed approach constructs the jointly sparse model in real domain by exploiting ...

• Codes Cross-Correlation Impact on S-curve Bias and Data-Pilot Code Pairs Optimization for CBOC Signals 

  Yang, Zaixiu; Huang, Zhigang; Geng, Shengqun (Společnost pro radioelektronické inženýrství, 2013-09)

  The aim of this paper is to analyze the impact of spreading codes cross-correlation on code tracking performance, and to optimize the data-pilot code pairs of Galileo E1 Open Service (OS) Composite Binary Offset Carrier ...

• HAPS Gateway Link in the 5850-7075 MHz and Coexistence with Fixed Satellite Service 

  Ahmed, Marwah; Rahman, Tharek; Abdalla, Yousif (Společnost pro radioelektronické inženýrství, 2013-09)

  Gateway link is essential to connect HAPS platform to terrestrial based networks. This crucial link is incorporated in HAPS fixed service spectrum allocation in considerably high frequencies, renders the link for more ...

• Robust Power and Subcarrier Allocation for OFDM-based Cognitive Radio Networks Considering Spectrum Sensing Uncertainties 

  Fathi, Houshang; Sadough, Seyed Mohammad-Sajad (Společnost pro radioelektronické inženýrství, 2013-09)

  ‎In this paper‎, ‎we address power and subcarrier allocation for cooperative cognitive radio (CR) networks in the presence of spectrum sensing errors‎. ‎First‎, ‎we derive the mutual interference of primary and secondary ...

• Distributed Extended Kalman Filter for Position, Velocity, Time, Estimation in Satellite Navigation Receivers 

  Jakubov, Ondrej; Kovar, Pavel; Kacmarik, Petr; Vejrazka, Frantisek (Společnost pro radioelektronické inženýrství, 2013-09)

  Common techniques for position-velocity-time estimation in satellite navigation, iterative least squares and the extended Kalman filter, involve matrix operations. The matrix inversion and inclusion of a matrix library ...

• Directional Relays for Multi-Hop Cooperative Cognitive Radio Networks 

  Nouri, Narges; Noori, Narges (Společnost pro radioelektronické inženýrství, 2013-09)

  In this paper, we investigate power allocation and beamforming in a relay assisted cognitive radio (CR) network. Our objective is to maximize the performance of the CR network while limiting interference in the direction ...

• Modeling and Analysis of Sub-Banding the Secondary Users’ Channel in Cognitive Radio Networks 

  Homayouni, Samira; Ghorashi, Seyed Ali (Společnost pro radioelektronické inženýrství, 2013-09)

  Modern cognitive radio systems employ dynamic spectrum access techniques and these networks allow more efficient usage of scarce spectrum. Secondary users are supposed to operate in primary users’ channels without interfering ...

• Connectivity-Based Self-Localization in WSNs 

  Kenyeres, Jozef; Kenyeres, Martin; Rupp, Markus; Farkas, Peter (Společnost pro radioelektronické inženýrství, 2013-09)

  Efficient localization methods are among the major challenges in wireless sensor networks today. In this paper, we present our so-called connectivity based approach i.e, based on local connectivity information, to tackle ...

• Fade Depth Prediction Using Human Presence for Real Life WSN Deployment 

  Horvat, Goran; Rimac-Drlje, Snjezana; Zagar, Drago (Společnost pro radioelektronické inženýrství, 2013-09)

  Current problem in real life WSN deployment is determining fade depth in indoor propagation scenario for link power budget analysis using (fade margin parameter). Due to the fact that human presence impacts the performance ...

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