Recent Submissions

  • Transmission and Distortion of an Optical-Microwave Modulation Transducer 

    Baranyi, András; Hilt, Attila (1995-08-31)
    The optical-microwave modulation transducer is a circuit transforming the intensity modulation of a lightwave to the modulation of a microwave carrier. In this paper using the linear parametric model of the transducer ...
  • Microwave harmonic generation in fiber-optical links 

    Hilt, Attila (2002)
    Optical transmission of microwave (MW) and millimeter-wave (MMW) signals has become an intensive re- search area in the last decade. There is a growing interest in optical processing of MW signals [1, 2], phased array ...
  • Availability Prediction of Telecommunication Application Servers Deployed on Cloud 

    Hilt, Attila; Járó, Gábor; Bakos, István (2016-01-20)
    Availability and reliability considerations are discussed in this paper with special focus on ‘cloud based’ Mobile Switching and Telecommunication Application Servers (MSS and TAS). Before the extensive deployment of cloud ...
  • Investigation of Direct Modulated Laser Diodes 

    Marozsák, Tamás; Hilt, Attila; Mihály, Sándor; Zólomy, Attila; Járó, Gábor (1997-10-17)
    Characterisation of direct modulated laser diodes has an important role in the design of microwave fiber optic links. Modulation bandwidth and electrical reflection was measured in GHz frequency range and applied for bias ...
  • New Topology for Distributed Amplifiers in Hybrid Integrated Technology 

    Zólomy, Attila; Hilt, Attila; Marozsák, Tamás; Járó, Gábor (1997-10-17)
    In this paper alternative circuit topologies for hybrid integrated distributed amplifiers (DA) are analyzed and compared. Improvement in the gain-bandwidth product and decrease in the gain ripple using the proposed new ...
  • Analysis of Access Transmission Network Upgrade in a Nationwide Mobile Network Modernization Project for EDGE Deployment 

    Hilt, Attila; Petrás, Péter; Emsley, Dean; Rybarczyk, Grzegorz (2007-05-16)
    Statistical details of a nationwide access transmission network upgrade is presented in this paper with special focus on GSM network modernization for EDGE (Enhanced Data rates for GSM Evolution) deployment.
  • Microwave Transmission Node Optimization for Access Capacity Increase in Mobile Networks 

    Hilt, Attila; Petrás, Péter (2007-05-16)
    Mature mobile networks heavily utilize the available access transmission (TRS) network (NW) capacities. Any new capacity demand may unavoidably lead to optimization. Modernization projects inherently offer the possibility ...
  • Comparison of Availability Figures of Distributed Systems Using Multiple Redundancy Methods 

    Nagy, Loránd; Hilt, Attila; Járó, Gábor; Oláh, Dániel; Talyigás, Zsófia (2016-06-24)
    Both hardware and software architectures have to meet the strict requirements for high availability. High availability requires considerations already in the design phase of the products. There are practical rules in system ...
  • Modelling Electro-Optical Interaction in MESFETs 

    Berceli, Tibor; Baranyi, András; Hilt, Attila; Ladvánszky, János (1993-07-01)
    A modelling procedure is presented for MESFETs with both electrical and optical inputs. First a physical model is introduced for the illuminated MESFET. The actual circuit model with electrical and optical variables is ...
  • Radio-Frequency Interference in Digital Communication Links 

    Hilt, Attila; Maury, Ghislaine; Cabon, Beatrice (1999-11-01)
    Transmission and reception of digitally modulated microwave (MW) and millimeter-wave (MMW) radio signals in point-to-point and point-to-multipoint systems are widely investigated [1-6]. This paper addresses the problem of ...
  • Frequency Conversion Methods by Interferometer and Photodiode in Microwave Optical Links 

    Hilt, Attila; Maury, Ghislaine; Cabon, Beatrice; Vilcot, Anne; Berceli, Tibor (1997-08)
    Recently fiber optic links have been investigated by several authors for the transmission and distribution of microwave and millimeter-wave signals [1], [2]. For further signal processing, frequency conversion is necessary ...
  • Low Noise Optical Receiver with Multi-Octave Bandwidth 

    Zólomy, Attila; Berceli, Tibor; Járó, Gábor; Hilt, Attila; Marozsák, Tamás (1998-12)
    A new approach for the design and construction of low noise broadband optical receivers is presented utilizing distributed amplification based on hybrid integrated technology. Using extremely low noise PHEMTs as well as ...
  • Hívás közbeni beszédfordítás: új hangalapú szolgáltatás a telefonhálózatokban 

    Hilt, Attila; Tündik, Máté Ákos; Nagy, Loránd; Bóta, Gergő; Luukkanen, Kalle (2017)
    A Nokia beszédfordító megoldást kínál a mobilszolgáltatók számára, amely a meglévô hálózatokba integrálható. Így a szolgáltatók a megszokott hanghívás mellett a telefonbeszélgetések valós idejû gépi fordítását is kínálhatják ...
  • Reducing operational costs of ultra-reliable low latency services in 5G 

    Varga, József; Hilt, Attila; Bíró, József; Rotter, Csaba; Járó, Gábor (2018)
    Ultra-reliable low latency (uRLL) communication in 5G dictates the deployment of distributed infrastructure with numerous datacenters for low latency, while hosting ultra-reliable services mandates attended datacenters. ...
  • Dynamic Properties of Optically Controlled FET Amplifiers 

    Berceli, Tibor; Cabon, Beatrice; Hilt, Attila; Ho Quoc, Anh; Pic, Étienne; Tedjini, Smail (1994-11-23)
    The transmission of FET amplifiers can be controlled by a laser light illuminating the device. Due to the illumination the gain of the amplifíer is increased significantly. In this paper the dynamic properties of the gain ...
  • Noise Properties of Optical Receiversusing Distributed Amplification 

    Járó, Gábor; Hilt, Attila; Zólomy, Attila; Berceli, Tibor (1997-08)
    ln wideband optical communications the bandwidth and the noise of optical receivers are crucial problems. The application of a distributed amplifier instead of a transimpedance amplifier in an optical receiver has the ...
  • Availability and Fade Margin Calculations for 5G Microwave and Millimeter-Wave Anyhaul Links 

    Hilt, Attila (2019-12-02)
    The deployment of new radio access technologies always provides a good opportunity and timing to optimize the existing mobile front- and backhaul (commonly called “anyhaul”). The legacy systems (Long-Term Evolution (LTE), ...
  • 3G-s femtocellák interferencia vizsgálata 

    Jakó, Zoltán; Jeney, Gábor (2011)
    A mobilszolgáltatók részesedése a távközlési piacon az idő múltával egyre jelentősebb. Új szolgáltatások jelennek meg, olyan nagy átviteli sebességeket és megfelelő minőségi paramétereket (QoS) biztosítva az előfizetők ...
  • 3GPP LTE (Long Term Evolution) 

    Mráz, János Albert (2008)
    A jelenlegi európai harmadik generációs (3G) technológiával (WCDMA/HSPA) szemben támasztott, növekvő felhasználói követelményeket követve indult el az új európai negyedik generációs mobil kommunikációs rendszer szabványosítása ...
  • General Bit Error Ratio Analysis of Interference Affected M-PSK Transmissions 

    Pap, László; Mráz, János Albert (HTE, 2011)
    The authors of current work provide a performanceanalysis in terms of the bit-error-ratio of gray-mappedM-PSK transmission. The analysis results exact and closed formexpressions which consider the effects of different ...

View more