Articole științifice/Scientific articles: Recent submissions

  • Design rules for lightweight short-range wireless networks [articol] 
    Sikora, Axel (Timişoara : Editura Politehnica, 2004)
    The proliferation of mobile computing devices including laptops, personal digital assistants (PDAs), and wearable computers has created an enormous demand for wireless personal area networks (WPANs). WPANs originally enabled ...
  • Performance analysis of packet-based voice networks [articol] 
    Serafin, Petru Lucian (Timişoara : Editura Politehnica, 2004)
    The article presents some investigations about performance for transporting compressed voice over packet-based networks. The scope is to determine optimal values for major parameters of the voice networks (packet size and ...
  • Network simulation using OMNet++ environment [articol] 
    Serafin, Petru Lucian (Timişoara : Editura Politehnica, 2004)
    The article presents the implementation using the simulation environment OMNet++ for study of network congestion. This simulation environment with its topology description language offers a good choice of a simulation tool ...
  • Analysis of simple inversable functions defined on Galois Fields for cryptography use [articol] 
    Scripcariu, Luminiţa; Duma, Petruţ (Timişoara : Editura Politehnica, 2004)
    The private character of the information transmitted on a communication channel or network could be ensured using some cryptography codes. Different encryption techniques performances depend on the processing time and the ...
  • Recognition of OFDM modulations : approach based on high-order time-frequency methods [articol] 
    Sălăgean, Marius Ioan; Ioana, Cornel; Quinquis, André (Timişoara : Editura Politehnica, 2004)
    Nowadays a deep interest for processing of different types of digital modulations (FSK, PSK, QAM and OFDM) exists. This paper studies a technique for discrimination of the OFDM modulation. The approach is based on the ...
  • The simulation of the effect of the geometry of the Rectangular Double Barrier structure about the transmission and reflection coefficient [articol] 
    Roșu-Niculescu, Ana; Petrescu, Teodor (Timişoara : Editura Politehnica, 2004)
    This paper is focused on the simulation of the effect of the geometry of the quantum Rectangular Double Barrier (RDB) structures about the transmission and reflection coefficient of them, in view of obtained electronics ...
  • Suggestions for availability improvement of optical cables [articol] 
    Radoš, Ivan; Sunarić, Tanja; Turalija, Pero (Timişoara : Editura Politehnica, 2004)
    This article analyzes suggestions for availability improvement of optical cables. There are specially analyze two different suggestions: decrease numbers of failures respectively increase mean time to failure and decrease ...
  • Evaluation of parameters used in lossless text compression with the Burrows-Wheeler transform [articol] 
    Rădescu, Radu; Bălășan, Ionuț (Timişoara : Editura Politehnica, 2004)
    This paper presents a study of parameters involved in the lossless text compression methods using the Burrows-Wheeler Transform (BWT). BWT (also known as Block Sorting) is one of the most efficient techniques used in data ...
  • On the performances of symbol ranking text compression method [articol] 
    Rădescu, Radu; Popa, Răzvan-Marius (Timişoara : Editura Politehnica, 2004)
    This paper presents an implementation of a method for text compression, first described by Shannon in 1951 and later, in 1997, by Fenwick. Unlike other compressors, which exploit symbol frequencies in order to assign shorter ...
  • Performance evaluation of routing protocols in ad-hoc wireless networks [articol] 
    Pușchiță, Emanuel; Palade, Tudor; Şelaru, Călin (Timişoara : Editura Politehnica, 2004)
    This paper presents the efficiency of different routing protocol in few wireless ad-hoc network scenarious. The key motivation behind the analysis of routing protocols is the reduction of the routing load. High routing ...
  • A multi-robot path planner for a disabled person assistance system: a framework [articol] 
    Pradel, Gilbert; Saïdi, Francois (Timişoara : Editura Politehnica, 2004)
    This work aims at modelling a system which allows a user and more particularly a disabled person, to give a mission to a team of robots and to determine the whole process leading to its execution. This paper proposes a ...
  • A new approach on delay coding: the receiver [articol] 
    Popescu, Sorin (Timişoara : Editura Politehnica, 2004)
    This paper represents the second part of an issue from the "Communications 2004". Now, herewith we are presenting the receiving part following the idea to see the Delay Coded Signal DCS as a QAM signal, namely a Vestigial ...
  • A complete laboratory on evolutionary electronics [articol] 
    Popa, Rustem (Timişoara : Editura Politehnica, 2004)
    Evolutionary design might be a promising option to the conventional design of electronic circuits. Each project is assembled from a number of component parts and then is tested in the frame of an evolutionary algorithm. ...
  • Portable PCM analyzer [articol] 
    Popa, Gheorghe Daniel; Oteșteanu, Marius-Emil (Timişoara : Editura Politehnica, 2004)
    The purpose of this paper is to find a solution to implement a portable PCM analyzer composed of two blocks: a small PCM interface module and a usual PC, which runs a graphical user interface software. The PCM interface ...
  • Speaker verification employing TESPAR coding and DTW [articol] 
    Pop, Petre G.; Lupu, Eugen (Timişoara : Editura Politehnica, 2004)
    TESPAR (Time Encoding Signal Processing and Recognition) is a processing and recognition method in the time domain, proposed by [1]. The key problem in TESPAR is to define the alphabet used for the coding process, alphabet ...
  • Performances of the Reed-Solomon codes decoded with the Guruswami-Sudan algorithm [articol] 
    Polgar, Zsolt; Năstase, Ana; Bota, Vasile (Timişoara : Editura Politehnica, 2004)
    The Guruswami-Sudan (GS) decoding algorithm is a list-type decoding algorithm that corrects more errors than the “declared” capability, for certain coding rates of the Reed-Solomon (RS) codes. Using computer simulations, ...
  • Single-phase rectifier with near sinusoidal input current [articol] 
    Pletea, Irinel Valentin; Alexa, Dimitrie (Timişoara : Editura Politehnica, 2004)
    The paper proposes a new uncontrolled single-phase rectifier, which does not inject inadmissible current harmonics in the AC mains. Such a rectifier does not necessitate on the AC side classic passive filters or active ...
  • Gradient algorithms with improved convergence [articol] 
    Partheniu, Cezar (Timişoara : Editura Politehnica, 2004)
    A generalized normalized gradient descend (GNGD) algorithm for linear finite-impulse response is presented and analized. The GNGD is an extension of the normalized least mean square (NLMS) algorithm by means of an additional ...
  • Virtual measurement of op amp parameters [articol] 
    Pană, Gheorghe; Mailat, Adrian; Crăciun, Adrian Virgil; Romanca, Mihai (Timişoara : Editura Politehnica, 2004)
    Circuit simulation by computer (SPICE simulation) has become a powerful and indispensable tool in both circuit analysis and design. This paper presents the identification of op amp parameters based on the SPICE model from ...
  • A low complexity decision feedback equalization for sparse wireless channels [articol] 
    Păun, Adrian-Florin; Obreja, Şerban Georgică (Timişoara : Editura Politehnica, 2004)
    In this paper, a low complexity decision feedback equalizer (DFE) appropriate for channels with long and sparse impulse response (IR) is studied. Such channels are encountered in many high-speed wireless communications ...

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