Now showing items 1-13 of 13

  • Computación ubicua 

    Lema Rosas, María Ángel (2010-05-20)
    Audiovisual
    Open Access
  • Contribution to the optimization of 4G mobile communications by means of advanced carrier aggregation strategies 

    Lema Rosas, María Ángel (Universitat Politècnica de Catalunya, 2015-05-22)
    Doctoral thesis
    Open Access
    Mobile broadband subscriptions and data traffic have increasingly grown in the past years with the deployment of the 3G and 4G technologies and the massive use of mobile devices. In this sense, LTE-A has been presented as ...
  • Cubic spline extrapolation for uplink channel quality prediction in LTE-A with carrier aggregation 

    Lema Rosas, María Ángel; García Lozano, Mario; Ruiz Boqué, Sílvia (Wiley-Blackwell, 2015-05-25)
    Article
    Open Access
    In the context of wireless communications, an accurate channel state information is the key to a correct radio resource management. In the uplink of long-term evolution advanced, obtaining up-to-date channel state information ...
  • Diseño de la topología de una red ad-hoc 

    Lema Rosas, María Ángel (Universitat Politècnica de Catalunya, 2008-07-23)
    Master thesis (pre-Bologna period)
    Open Access
    Las redes ad-hoc de comunicación están formadas por diferentes dispositivos, normalmente inalámbricos, que pueden situarse en cualquier punto del espacio. Para poder comunicarse se han de definir enlaces entre los ...
  • Green and effi cient RAN architectures 

    García Lozano, Mario; González González, David; Lema Rosas, María Ángel; Papaj, Ján (River Publishers, 2016-06-01)
    Part of book or chapter of book
    Open Access
    The demand for mobile connectivity is continuously increasing, and by 2020 Mobile and Wireless Communications will serve not only very dense populations of mobile phones and nomadic computers, but also the expected ...
  • Improved component carrier selection considering MPR information for LTE-A uplink systems 

    Lema Rosas, María Ángel; García Lozano, Mario; Ruiz Boqué, Sílvia; González González, David (IEEEXPLORE, 2013)
    Conference report
    Restricted access - publisher's policy
    Carrier Aggregation (CA) is one of the key features introduced in LTE Release 10 to achieve higher levels of throughput. Two or more component carriers (CCs) are aggregated and user equipments (UEs) simultaneously transmit ...
  • Improved scheduling techniques for efficient uplink communications with carrier aggregation 

    Lema Rosas, María Ángel; García Lozano, Mario; Ruiz Boqué, Sílvia; Olmos Bonafé, Juan José (2013)
    Conference report
    Restricted access - publisher's policy
    Transmitted power in Long Term Evolution - Advanced (LTE-A) uplink (UL) is strongly related to the number of physical resource blocks (PRBs) allocated. As the transmitted bandwidth increases power does so. However, this ...
  • Interference coordination method for CSI improvement in LTE uplink with carrier aggregation 

    Lema Rosas, María Ángel; García Lozano, Mario; Ruiz Boqué, Sílvia (Institute of Electrical and Electronics Engineers (IEEE), 2015)
    Conference report
    Open Access
    Carrier Aggregation is an important feature in Long Term Evolution Advanced (LTE-A). It allows operators to provide larger operational bandwidths without the need of having a contiguous, large piece of spectrum. However, ...
  • Introduction of MPR information for enhanced multi-cluster scheduling in LTE-A uplink 

    Lema Rosas, María Ángel; García Lozano, Mario; Ruiz Boqué, Sílvia; González González, David (2013)
    Conference report
    Restricted access - publisher's policy
    Against previous Long Term Evolution (LTE) re-leases, LTE-Advanced (LTE-A) allows the use of non-contiguous resource allocation in the uplink (UL). This feature leads to an increase in spectral efficiency thanks to link ...
  • Modelling channel estimation error in LTE link level simulations 

    Serra, Albert; Olmos Bonafé, Juan José; Lema Rosas, María Ángel (2012)
    Conference report
    Restricted access - publisher's policy
    Channel estimation is a key aspect for the performance of the physical layer in all MIMO-OFDM systems. In order to obtain realistic performance assessments from the LTE link level simulator, channel estimation errors must ...
  • MPR-aware scheduler for carrier aggregation transmissions in LTE uplink 

    Lema Rosas, María Ángel; García Lozano, Mario; Ruiz Boqué, Sílvia (2015-09-01)
    Article
    Open Access
    Unlike previous Long Term Evolution (LTE) releases, LTE - Advanced (LTE-A) allows the use of non-contiguous resource allocation in the uplink (UL). This feature leads to increase the spectral efficiency thanks to link ...
  • On the performance of LTE UL power control in realistic conditions 

    Lema Rosas, María Ángel; García Lozano, Mario; Ruiz Boqué, Sílvia; Olmos Bonafé, Juan José (Springer, 2013-05-07)
    Conference report
    Restricted access - publisher's policy
    This paper deals with the interference control in the uplink (UL) of Long Term Evolution (LTE) systems. Although the multiple access technique allows an almost null intra-cell interference, the system is still sensitive ...
  • Planning optimization software tool for DVB-T and DVB-T2 

    Lema Rosas, María Ángel; Torras López, Evelyn (Universitat Politècnica de Catalunya, 2010-06-25)
    Master thesis
    Open Access