Now showing items 1-20 of 21

  • Access modes based on coordinated multipoint for relay transmissions in 4G systems 

    Lagén Morancho, Sandra (Universitat Politècnica de Catalunya, 2011-12-22)
    Master thesis (pre-Bologna period)
    Open Access
    English: the objective of this project is to explore and evaluate new system architectures for next generation cellular systems, by developing new system deployments and then deriving algorithms for the resource allocation ...
  • Channel training procedures for MIMO interfering point-to-multipoint channel 

    Agustín de Dios, Adrián; Lagén Morancho, Sandra; Vidal Manzano, José (2014)
    Conference report
    Restricted access - publisher's policy
    A precise knowledge of the MIMO channel between the serving node and the user equipment (UE) is important for attaining good data rates in downlink transmissions (DL) in cellular systems. The interfering point-tomulti ...
  • Coexisting linear and widely linear transceivers in the MIMO interference 

    Lagén Morancho, Sandra; Agustín de Dios, Adrián; Vidal Manzano, José (2016-01)
    Article
    Open Access
    Recent results have shown the benefits of widely linear precoding (WLP) in the MIMO interference channel (MIMO IC) assuming that all transmitters can follow the same strategy. Motivated by a transitional scenario where ...
  • Coordination strategies for interference management in MIMO dense cellular networks 

    Lagén Morancho, Sandra (Universitat Politècnica de Catalunya, 2016-12-21)
    Doctoral thesis
    Open Access
    The envisioned rapid and exponential increase of wireless data traffic demand in the next years imposes rethinking current cellular networks due to the available spectrum scarcity. In this regard, 3 main drivers are ...
  • Decentralized beamforming with coordinated sounding for inter-cell interference management 

    Lagén Morancho, Sandra; Agustín de Dios, Adrián; Vidal Manzano, José (VDE Conference Publications, 2014)
    Conference report
    Restricted access - publisher's policy
    This paper presents and evaluates a decentralized beamforming design for inter-cell interference management that is highly recommended in Time Division Duplex (TDD) cellular network deployments and interference limited ...
  • Decentralized coordinated precoding for dense TDD small cell networks 

    Lagén Morancho, Sandra; Agustín de Dios, Adrián; Vidal Manzano, José (2015-08-01)
    Article
    Open Access
    Cellular networks need the densification of small eNBs (SeNBs) to face the tremendous data traffic demand growth, implying an interference increase and making transmit coordination a key enabler. This article proposes a ...
  • Decentralized widely linear precoding design for the MIMO interference channel 

    Lagén Morancho, Sandra; Agustín de Dios, Adrián; Vidal Manzano, José (2014)
    Conference report
    Restricted access - publisher's policy
    his paper addresses the interference management in a MIMO interference channel (MIMO-IC) by proposing a decentralized transmit and receive beamformer optimization using improper (or circularly asymmetric complex) Gaussian ...
  • Distributed inter-cluster interference management for CoMP-based cellular networks 

    Lagén Morancho, Sandra; Agustín de Dios, Adrián; Vidal Manzano, José (2013)
    Conference report
    Restricted access - publisher's policy
    This paper proposes distributed inter-cluster interference management procedures for 1 Coordinated Multi-Point (CoMP) Time Division Duplexing (TDD) cellular networks, in which a set of base stations (BSs), that form a ...
  • Distributed Interference Management for CoMP-based Cellular Networks 

    Lagén Morancho, Sandra (Universitat Politècnica de Catalunya, 2013-09-04)
    Master thesis
    Restricted access - publisher's policy
    [ANGLÈS] With the objective of improving the system spectral efficiency and providing a homogeneous coverage for future cellular networks, this thesis: 1) proposes distributed inter-cluster interference management procedures ...
  • Distributed user-centric clustering and precoding design for CoMP joint transmission 

    Lagén Morancho, Sandra; Agustín de Dios, Adrián; Vidal Manzano, José; Soret, Beatriz; Pedersen, Klaus (2015)
    Conference report
    Restricted access - publisher's policy
    This paper addresses distributed interference management in downlink of multi-cell multiple- input multiple-output (MIMO) time division duplex (TDD) networks. Each user is associated with a user-centric cluster of base ...
  • Efficient use of paired spectrum bands through TDD small cell deployments 

    Agustín de Dios, Adrián; Lagén Morancho, Sandra; Vidal Manzano, José; Muñoz Medina, Olga; Pascual Iserte, Antonio; Zhiheng, Guo; Ronghui, Wen (2017-09)
    Article
    Open Access
    Traditionally, wireless cellular systems have been designed to operate in frequency division duplexing (FDD) paired bands that allocate the same amount of spectrum for both downlink (DL) and uplink (UL) communications. ...
  • Energy efficiency in latency-constrained application offloading from mobile clients to multiple virtual machines 

    Lagén Morancho, Sandra; Pascual Iserte, Antonio; Muñoz Medina, Olga; Vidal Manzano, José (2017-11-28)
    Article
    Open Access
    This paper addresses the energy-latency trade-off in distributed application offloading, in which an energy-limited handset offloads totally or partially an application to one or several virtual machines (VMs) located in ...
  • Energy efficient cell load-aware coverage optimization for small-cell networks 

    Agustín de Dios, Adrián; Lagén Morancho, Sandra; Vidal Manzano, José (2015)
    Conference report
    Restricted access - publisher's policy
    Self-organizing network is a new capability envisioned for the near-future wireless cellular networks. Among the different use cases, here we tackle the coverage optimization with the objective of adjusting the power devoted ...
  • Improper Gaussian signaling for the Z-interference channel 

    Lagén Morancho, Sandra; Agustín de Dios, Adrián; Vidal Manzano, José (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    Conference report
    Restricted access - publisher's policy
    The optimal transmission scheme for a multiple-input multiple-output point-to-point channel (MIMO-P2P) is dependent on the type of received interference, which can be either proper or improper. We will show that the presence ...
  • Joint user scheduling and transmit direction selection in 5G TDD dense small cell networks 

    Lagén Morancho, Sandra; Agustín de Dios, Adrián; Vidal Manzano, José (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Conference report
    Restricted access - publisher's policy
    This paper proposes a joint user scheduling and transmit direction selection procedure for dynamic TDD in 5G dense small cell networks, where the transmit direction (i.e. downlink (DL) or uplink (UL)) selected per small ...
  • Joint user scheduling, precoder design, and transmit direction selection in MIMO TDD small cell networks 

    Lagén Morancho, Sandra; Agustín de Dios, Adrián; Vidal Manzano, José (2017-04-01)
    Article
    Open Access
    New short-length single-direction frame structures are proposed for 5G time division duplex (TDD) systems, where the transmit direction [i.e., either downlink (DL) or uplink (UL)] can be independently chosen at each cell ...
  • Long-term provisioning of radio resources based on their utilization in dense OFDMA networks 

    Lagén Morancho, Sandra; Muñoz Medina, Olga; Pascual Iserte, Antonio; Vidal Manzano, José; Agustín de Dios, Adrián (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Conference report
    Restricted access - publisher's policy
    This paper presents long-term resource provisioning schemes for dense multi-cell OFDMA-based networks, where multiple cells with possibly overlapping coverage areas compete for the same set of resources. The optimization ...
  • Network-MIMO for downlink in-band relay transmissions 

    Lagén Morancho, Sandra; Agustín de Dios, Adrián; Vidal Manzano, José (2013-01-23)
    Article
    Restricted access - publisher's policy
    With the objective of improving the spectral efficiency and coverage homogeneity of wireless cellular systems in the downlink, we investigate how to take advantage of two promising transmission technologies envisioned in ...
  • On the superiority of improper Gaussian signaling in wireless interference MIMO scenarios 

    Lagén Morancho, Sandra; Agustín de Dios, Adrián; Vidal Manzano, José (2016-08)
    Article
    Open Access
    Recent results have elucidated the benefits of using improper Gaussian signaling (IGS) as compared to conventional proper Gaussian signaling (PGS) in terms of achievable rate for interference-limited conditions. This paper ...
  • Signal-timing offset compensation in dense TDD OFDM-based networks 

    Agustín de Dios, Adrián; Lagén Morancho, Sandra; Vidal Manzano, José (Institute of Electrical and Electronics Engineers (IEEE), 2017)
    Conference report
    Open Access
    Orthogonal Frequency Division Multiplexing (OFDM)-based networks rely on time synchronization to obtain their best performance. Time synchronization with neighboring nodes can be satisfied by increasing the cyclic prefix ...