Browsing by Author "Leinonen, Tuomas"

Now showing 1 - 3 of 3
  • Thumbnail Image
    Item
    Aligning and tracking a beam steerable millimeter-wave radio link
    (2015-12-14) Leinonen, Tuomas; Putkonen, Jyri; Sähkötekniikan korkeakoulu; Viikari, Ville
    In order to provide high-throughput mobile broadband in a dense urban information society, upcoming cellular networks will finally employ the under-utilized millimeter-wave (mmW) frequencies. The challenging mmW radio environment, however, necessitates massive cell densification with wireless backhauling using very directional links. This thesis investigates how these links between access points may be aligned efficiently, and how alignment reflects the network organization. The work provides a thorough presentation of different high-level aspects and background information required when designing a mmW small cell system. In terms of alignment functionality, both automatic link establishment and proactive tracking are considered. Additionally, the presentation includes an overview of beam steerable antennas, mmW propagation in urban environments, and network organization. The thesis further specifies requirements, proposes possible approaches and compares those with existing implementations. Most of existing mmW beam alignment solutions are intended for short-range indoor communications and do not address the issues in cellular systems. While existing functionality considers only a single link between two devices, efficient design should consider both the entire network and the underlying phenomena. The devices should further exploit the existing network infrastructure, location and orientation information, and the concepts of machine learning. Even though the world has recently seen advancements in the related fields, there is still much work to be done before commercial deployment is possible.
  • No Thumbnail Available
    Item
    Automaattisten autojen vaikutus liikenteeseen ja niiden huomioiminen kaupunkiliikenteen suunnittelussa
    (2017-12-03) Leinonen, Tuomas; Ojala, Jouni; Insinööritieteiden korkeakoulu; Mattila, Hanna
  • No Thumbnail Available
    Item
    Mobiilin ohjelmistoradion haasteita - tarkastelussa päätelaitteen antenni ja esiaste
    (2012-12-07) Leinonen, Tuomas; Valkonen, Risto; Sähkötekniikan korkeakoulu; Turunen, Markus