Szukaj
Wyświetlanie pozycji 1-10 z 28
Electronically Tunable Current-mode High-order Ladder Low-pass Filters Based on CMOS Technology
(Společnost pro radioelektronické inženýrství, 2015-12)
This paper describes the design of current mode low-pass ladder filters based on CMOS technology. The filters are derived from passive RLC ladder filter prototypes using new CMOS lossy and lossless integrators. The all-pole ...
Ku Band Rotary Joint Design for SNG Vehicles
(Společnost pro radioelektronické inženýrství, 2015-12)
A wideband I-type rectangular waveguide rotary joint (RJ) is designed, simulated and built. It has an excellent performance over the whole Ku Band (10.7-14.5 GHz) where the return loss is less than -23 dB at its highest ...
Multi-Core DSP Based Parallel Architecture for FMCW SAR Real-Time Imaging
(Společnost pro radioelektronické inženýrství, 2015-12)
This paper presents an efficient parallel processing architecture using multi-core Digital Signal Processor (DSP) to improve the capability of real-time imaging for Frequency Modulated Continuous Wave Synthetic Aperture ...
A Robust Color Image Watermarking Scheme Using Entropy and QR Decomposition
(Společnost pro radioelektronické inženýrství, 2015-12)
Internet has affected our everyday life drastically. Expansive volumes of information are exchanged over the Internet consistently which causes numerous security concerns. Issues like content identification, document and ...
A Novel Diversity Receiver Structure for Severe Fading and Frequency Offset Conditions
(Společnost pro radioelektronické inženýrství, 2015-12)
This paper presents a novel diversity receiver of MPSK signal in fading channel in the presence of the carrier frequency offset. As a part of this receiver, a new algorithm for the estimation of the combining coefficients ...
Analysis of Coexistence of DRM Plus and FM Broadcasting Systems
(Společnost pro radioelektronické inženýrství, 2015-12)
This paper deals with DRM (Digital Radio Mondiale) Plus and FM (Frequency Modulation) radio broadcasting systems coexistence. It brings results based on measurement of mutual interferences of each to other. Minimal necessary ...
Cross-Layer Combining of Adaptive Modulation and Truncated ARQ in Multichannel Beamforming MIMO Systems
(Společnost pro radioelektronické inženýrství, 2015-12)
In this study the authors provide a cross-layer design of multiple-input-multiple-output (MIMO) systems, with the aim to maximize spectral efficiency. We consider MIMO systems based on a multichannel beamforming technique ...
Efficient Resource Allocation and Sectorization for Fractional Frequency Reuse (FFR) in LTE Femtocell Systems
(Společnost pro radioelektronické inženýrství, 2015-12)
The Fractional Frequency Reuse (FFR) is a resource allocation technique that can effectively mitigate inter-cell interference (ICI) in LTE based HetNets and it is a promising solution. Various FFR schemes have been suggested ...
Optimization of Far-Field Antenna Range
(Společnost pro radioelektronické inženýrství, 2015-12)
Measurements of test antennas are performed on antenna ranges. The operated microwave far-field outdoor range was built-up in 1970’s and therefore it was not appropriate for the today measurements. Thus, it was decided to ...
Comments on Pinched Hysteresis Loops of Memristive Elements
(Společnost pro radioelektronické inženýrství, 2015-12)
The hysteresis loops pinched in the v-i origin belong to well-known fingerprints of memristive elements driven by bipolar periodical signals. Some element properties follow from the loop behavior in the close neighborhood ...