Browsing 2010/1 by Title
Now showing items 25-31 of 31
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The PAPR and Simple PAPR Reduction of the 2D Spreading Based Communication Systems
(Společnost pro radioelektronické inženýrství, 2010-04)This paper deals with Peak to Average Power Ra- tio (PAPR) characteristics and the theory of variable spread- ing factor orthogonal frequency and code division multiplex- ing (VSF-OFCDM) systems. Comparison and evaluation ... -
Performance of Data Services in Cellular CDMA in Presence of Soft Handoff and Packet Combining
(Společnost pro radioelektronické inženýrství, 2010-04)Performance analysis of data services is studied in CDMA network in presence of soft handoff (HO) and packet combining. Packet combining in conjunction with soft handoff is found to enhance throughput, reduce delay and ... -
A Robust Threshold for Iterative Channel Estimation in OFDM Systems
(Společnost pro radioelektronické inženýrství, 2010-04)A novel threshold computation method for pilot symbol assisted iterative channel estimation in OFDM systems is considered. As the bits are transmitted in packets, the proposed technique is based on calculating a particular ... -
Simulation and Evaluation of CTP and Secure-CTP Protocols
(Společnost pro radioelektronické inženýrství, 2010-04)The paper discusses characteristics and qualities of two routing protocols – Collection Tree Protocol and its secure modification. The original protocol, as well as other protocols for wireless sensors, solves only problems ... -
Systematic Design of Fully Balanced Differential Current-Mode Multiple-Loop Feedback Filters Using CFBCCII
(Společnost pro radioelektronické inženýrství, 2010-04)In this paper, a systematic design method producing balanced current-mode filters is proposed, using current controlled fully balanced second-generation current conveyor circuit (CFBCCII). In this method, many kind of ... -
A Terrestrial Multiple-Receiver Radio Link Experiment at 10.7 GHz - Comparisons of Results with Parabolic Equation Calculations
(Společnost pro radioelektronické inženýrství, 2010-04)This work presents the results of a terrestrial multiple-receiver radio link experiment at 10.7 GHz. Results are shown in the form of the power levels recorded at several antennas attached to a receiving mast. Comparisons ... -
Use of Multi-Watermarking Schema to Maintain Awareness in a Teleneurology Diagnosis Platform
(Společnost pro radioelektronické inženýrství, 2010-04)Following the tremendous evolution of transferring images through the Internet, it is necessary to ensure security during this act, especially for medical images. The application of multiple watermarking tech- nique ...