Browsing by Author "Anskaitis, Aurimas"

Now showing items 1-20 of 32

    • Activity dependent power allocation algorithm for IEEE 802.11 networks 

      Cuzanauskas, Tomas; Medeišis, Artūras; Anskaitis, Aurimas (11th IEEE International Wireless Communications and Mobile Computing Conference (IEEE IWCMC), 24-28 Aug., 2015, Dubrovnik, Croatia : [proceedings], 2015)
      IEEE 802.11 has become one of the most used wireless access technologies amongst home users and Wireless Internet Service Providers (WISPs). Thanks to flexible use and easy deployment the amount of equipment grew exponentially. ...

    • An investigation of the perceptual value of voice frames 

      Kajackas, Algimantas; Anskaitis, Aurimas (Informatica, 2009)
      It is well known, the voice segments and coincident data packets are not equally valued and significant for decoding and comprehension of speech signal. Some lost segments may only slightly worsen audible quality, while ...

    • Analysis of quality of coded voice signals 

      Anskaitis, Aurimas; Kajackas, Algimantas; Navakauskas, Dalius (2009)

    • Analysis of Quality of Coded Voice Signals 

      Anskaitis, Aurimas (2010)
      The dissertation investigates the problem of quality of coded voice. The main attention is paid to voice quality evaluation under packet loss conditions. The aim of the work is to improve voice quality evaluation algorithms. ...

    • The analysis of the influence of adjacent radio stations positions on total electromagnetic field intensity observed near the projected BS 

      Anskaitis, Aurimas; Guršnys, Darius; Mikėnas, Karolis; Pocius, Ričardas Visvaldas (22nd International Conference “Electromagnetic Disturbances EMD’2012”, 2012)
      Development of new cellular networks and introduction of new base stations should conform to regulatory documents, regulating the amount of total electromagnetic field intensity. The estimation of total electromagnetic ...

    • Electromagnetic compatibility problems in LTE mobile networks 800 MHz frequency band 

      Stankevičius, Evaldas; Medeišis, Artūras; Paulikas, Šarūnas; Anskaitis, Aurimas (Elektronika ir elektrotechnika, 2015)
      This paper examines the LTE UE (Long-Term Evolution User Equipment) in 800 MHz frequency band (the so-called digital dividend) interference to Short Range Devices (SRD ) in the band of 863 MHz – 870 MHz. The fundamental ...

    • Extension of PESQ algorithm for short voice segments 

      Anskaitis, Aurimas; Kajackas, Algimantas (Measurement of Speech, Audio and Video Quality in Networks : proceedings of conference MESAQIN 2010, Prague (Czech Republic), June 2010, 2010)

    • Game theory for future IEEE 802.11 spectrum sharing 

      Cuzanauskas, Tomas; Anskaitis, Aurimas (Electrical, Electronic and Information Sciences (eStream) : proceedings of the 2015 Open conference, 21 April, 2015, Vilnius, Lithuania / Vilnius Gediminas Technical University, 2015)
      This article describes one of many possible paradigms for future wireless applications. The spectrum in which Wi-Fi operates these days is overcrowded and currently applied rules for Wi-Fi operation are not up-to-date. By ...

    • Game theory for future IEEE 802.11 spectrum sharing 

      Cuzanauskas, Tomas; Anskaitis, Aurimas (2015 Open Conference of Electrical, Electronic and Information Sciences (eStream), April 21, 2015, Vilnius, Lithuania, 2015)
      This article describes one of many possible paradigms for future wireless applications. The spectrum in which Wi-Fi operates these days is overcrowded and currently applied rules for Wi-Fi operation are not up-to-date. By ...

    • IEEE 802.11e capabilities in dense wireless networks 

      Cuzanauskas, Tomas; Anskaitis, Aurimas (2016 Open Conference of Electrical, Electronic and Information Sciences (eStream) : proceedings of the conference, April 19, 2016, Vilnius, Lithuania / Vilnius Gediminas Technical University, 2016)
      The usage of IEEE 802.11 wireless equipment has been growing in recent years. Nevertheless, the spectrum which is used by such equipment is already overcrowded and due to this, the performance of wireless devices is ...

    • IEEE 802.11e capabilities in dense wireless networks 

      Cuzanauskas, Tomas; Anskaitis, Aurimas (2016 Open Conference of Electrical, Electronic and Information Sciences (eStream), April 19, 2016, Vilnius, Lithuania, 2016)
      The usage of IEEE 802.11 wireless equipment has been growing in recent years. Nevertheless, the spectrum which is used by such equipment is already overcrowded and due to this, the performance of wireless devices is ...

    • Individual quality of service concept in next generations telecommunications networks 

      Kajackas, Algimantas; Anskaitis, Aurimas; Guršnys, Darius (Elektronika ir elektrotechnika, 2005)
      After the review of published articles and with the help of measurement data this paper shows that mobile communication conditions are not equal for different users. For some of them it can be even bad. From the point of ...

    • Innovative wireless medium control algorithm for wireless devices in ISM bands 

      Cuzanauskas, Tomas; Anskaitis, Aurimas (International Journal of Computer Applications (IJCA), 2016)
      Since the beginning of the IEEE 802.11 technology its channel access in ISM bands was governed by simple rules to ensure fairness and co-existence: such as upper ceiling on maximum transmitted power, moderate out-of-band ...

    • Interference-aware power coordination game for ISM bands 

      Cuzanauskas, Tomas; Medeišis, Artūras; Anskaitis, Aurimas; Cremene, Ligia C.; Sydor, John; Holland, Oliver D.; Haddad, Yoram; Nekovee, Maziar (9th International conference on cognitive radio oriented wireless networks and communications (CROWNCOM), 2-4 June, 2014, Oulu, Finland, 2014)
      The use of wireless equipment in the alreadyovercrowded ISM bands had been further growing in recent years. This increase leads to high interference levels, which causes unstable communication and an average throughput ...

    • Investigation of total electromagnetic field intensity distribution in vicinity of BS concentration 

      Anskaitis, Aurimas; Guršnys, Darius; Mikėnas, Karolis; Pocius, Ričardas Visvaldas (EMD'2011: XXI International Conference on Electromagnetic Disturbances 2011 : 28-30 September, 2011, 2011)
      It is well-known that simple methods and models exist, allowing easy assessment of EMF radiation distribution in the near vicinity of individual radio transmitters, for example, when cellular base stations or transmitters ...

    • Investigation the ability of objective measures of the perceptual speech quality in mobile networks 

      Kajackas, Algimantas; Anskaitis, Aurimas (Elektronika ir elektrotechnika, 2005)
      There is continued the work of iQoS module creation. Possibilities to create special module which should measure de facto perceived speech quality (iQoS module) are investigated. The paper thoroughly reviews scientific ...

    • ISM-advanced band concept 

      Medeišis, Artūras; Sydor, John; Cremene, Ligia; Więckowski, Dariusz; Haddad, Yoram; Holland, Oliver; Anskaitis, Aurimas; Cuzanauskas, Tomas (Cognitive radio policy and regulation, 2014)
      In this section we describe the concept of ‘‘ISM Advanced’’ band, i.e. possible conversion of one (or a part of) traditional ISM bands, such as well-known 2.4 GHz band, into a CR-friendly spectrum access framework that ...

    • ISM-Advanced: Improved access rules for unlicensed spectrum 

      Medeišis, Artūras; Sydor, John; Cremene, Ligia C.; Holland, Oliver; Anskaitis, Aurimas; Wiecek, Dariusz; Haddad, Yoram; Cuzanauskas, Tomas (2014 IEEE International symposium on dynamic spectrum access networks (DySPAN 2014), April 1-4 2014, McLean, Washington, USA, 2014)
      Access to unlicensed spectrum has thus far been based on simplistic rules, such as a transmission power limitation, requirement for tolerance of interference, and a relaxed out-of-band transmission mask. Such rules originate ...

    • Koduoto balso kokybės tyrimas 

      Anskaitis, Aurimas (2010)
      Disertacijoje nagrinėjama koduoto balso kokybės vertinimo problematika. Pagrindinis dėmesys skiriamas balso kokybės tyrimams, kai perduodama koduota šneka ir prarandami balso paketai. Darbo tikslas yra patobulinti koduoto ...

    • Method for conversational voice quality evaluation in cellular networks 

      Kajackas, Algimantas; Anskaitis, Aurimas; Guršnys, Darius (Elektronika ir elektrotechnika, 2011)
      In this paper, method for evaluation of varying conversational speech quality in wireless communications is proposed. The proposed algorithm evaluates quality degradations using indicators based on count of lost frames and ...