2009/3
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Recent Submissions
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Derivation of Equivalent Material Models for Composite Laminated Materials
(Společnost pro radioelektronické inženýrství, 2009-09)In this paper, an original approach of derivation of equivalent electrical models for multilayer composite materials is presented. The purpose of the modeling is to approximate a given composite material by an equivalent ... -
Performances of Hybrid Amplitude Shape Modulation for UWB Communications Systems over AWGN Channel in a Single and Multi-User Environment
(Společnost pro radioelektronické inženýrství, 2009-09)This paper analyzes the performance of the hybrid Amplitude Shape Modulation (h-ASM) scheme for the time-hopping ultra-wideband (TH-UWB) communication systems in the single and multi-user environment. h-ASM is the combination ... -
Current-Controlled Current-Mode Universal Biquad Employing Multi-Output Transconductors
(Společnost pro radioelektronické inženýrství, 2009-09)This paper deals with RC active biquad working in the so-called current mode (CM). The design approach uses only three transconductors (OTA) with the minimum necessary number of outputs and with only three passive grounded ... -
Experimental Characterization of System Parameters for Ranging in IEEE 802.15.4a using Energy Detectors
(Společnost pro radioelektronické inženýrství, 2009-09)The IEEE 802.15.4a standard for impulse radio ultrawide band (IR-UWB) communication systems defines a ranging scheme which relies on the measurement of the round-trip propagation time of electromagnetic pulses. Accuracy ... -
A Novel First-Order Current-Mode All-Pass Filter Using CDTA
(Společnost pro radioelektronické inženýrství, 2009-09)This paper presents a new realization of a firstorder current-mode (CM) all-pass filter (APF) using the recently proposed modern active building block (ABB), namely the current differencing transconductance amplifier (CDTA). ... -
Comparison of Generative and Discriminative Approaches for Speaker Recognition with Limited Data
(Společnost pro radioelektronické inženýrství, 2009-09)This paper presents a comparison of three different speaker recognition methods deployed in a broadcast news processing system. We focus on how the generative and discriminative nature of these methods affects the speaker ... -
Imaging of the Building Contours with Through the Wall UWB Radar System
(Společnost pro radioelektronické inženýrství, 2009-09)Any actual information about a building interior can be very useful before entering a dangerous area. It can be used to plan strategies in many rescue and security applications. The paper deals with imaging of the inner ... -
FPGA Implementation of a Frame Synchronization Algorithm for Powerline Communications
(Společnost pro radioelektronické inženýrství, 2009-09)This paper presents an FPGA implementation of a pilot–based time synchronization scheme employing orthogonal frequency division multiplexing for powerline communication channels. The functionality of the algorithm is ... -
Low Voltage Current Mode Switched-Current-Mirror Mixer
(Společnost pro radioelektronické inženýrství, 2009-09)A new CMOS active mixer topology can operate at 1 V supply voltage by use of SCM (switched currentmirror). Such current-mode mixer requires less voltage headroom with good linearization. Mixing is achieved with four improved ... -
Reader’s Comment on: Application of the Global Optimization Approaches to Planar Near-Field Antenna Phaseless Measurements
(Společnost pro radioelektronické inženýrství, 2009-09) -
Adaptive Digital Image Watermarking Based on Combination of HVS Models
(Společnost pro radioelektronické inženýrství, 2009-09)In this paper two new blind adaptive digital watermarking methods of color images are presented. The adaptability is based on perceptual watermarking which exploits Human Visual System (HVS) models. The first method performs ...
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