search query: @keyword heterogeneous networks / total: 10
reference: 4 / 10
« previous | next »
Author:Karaiskos, Christos
Title:Altruistic Transmit Beamforming for Cross-layer Interference Mitigation in Heterogeneous Networks
Publication type:Master's thesis
Publication year:2012
Pages:[10] + 78 s. + liitt. 8      Language:   eng
Department/School:Tietoliikenne- ja tietoverkkotekniikan laitos
Main subject:Tietoliikennetekniikka   (S-72)
Supervisor:Hämäläinen, Jyri
Instructor:Dowhuszko, Alexis
Electronic version URL: http://urn.fi/URN:NBN:fi:aalto-201303201829
OEVS:
Electronic archive copy is available via Aalto Thesis Database.
Instructions

Reading digital theses in the closed network of the Aalto University Harald Herlin Learning Centre

In the closed network of Learning Centre you can read digital and digitized theses not available in the open network.

The Learning Centre contact details and opening hours: https://learningcentre.aalto.fi/en/harald-herlin-learning-centre/

You can read theses on the Learning Centre customer computers, which are available on all floors.

Logging on to the customer computers

  • Aalto University staff members log on to the customer computer using the Aalto username and password.
  • Other customers log on using a shared username and password.

Opening a thesis

  • On the desktop of the customer computers, you will find an icon titled:

    Aalto Thesis Database

  • Click on the icon to search for and open the thesis you are looking for from Aaltodoc database. You can find the thesis file by clicking the link on the OEV or OEVS field.

Reading the thesis

  • You can either print the thesis or read it on the customer computer screen.
  • You cannot save the thesis file on a flash drive or email it.
  • You cannot copy text or images from the file.
  • You cannot edit the file.

Printing the thesis

  • You can print the thesis for your personal study or research use.
  • Aalto University students and staff members may print black-and-white prints on the PrintingPoint devices when using the computer with personal Aalto username and password. Color printing is possible using the printer u90203-psc3, which is located near the customer service. Color printing is subject to a charge to Aalto University students and staff members.
  • Other customers can use the printer u90203-psc3. All printing is subject to a charge to non-University members.
Location:P1 Ark Aalto  850   | Archive
Keywords:heterogeneous networks
femtocells
interference mitigation
MIMO
closed-loop methods
transmit beamforming
cross-layer interference
Abstract (eng): The emergence of heterogeneous networks, with low-power nodes operating under the umbrella of high-power macro cells, simplifies planning procedures for operators, but introduces the problem of cross-layer interference between the overlapping cells.

An effective technique for combating interference is transmit beam-forming (TBF), a transmitter-side technique which utilizes partial knowledge of the channel and presence of multiple antennas at the transmitter to enhance the signal reception quality at a receiver.
When applied to the base station associated with the receiver, TBF boosts the desired signal.
On the other hand, when applied to the interfering base station, TBF reduces the effect of the interference signal.
The former technique is commonly referred to as egoistic TBF, while the latter is known as altruistic TBF.

In this thesis, we provide theoretical evaluation of the performance gains that altruistic TBF is able to offer to a heavily interfered user in a heterogeneous setting, when channel state information is conveyed from the receiver to the transmitter through a limited feedback channel.
We show that the application of altruistic TBF to specifically defined clusters of interferers is able to drastically improve performance for the victim user.
Furthermore, we prove the exact upper bound for the performance of the victim user, when only phase feedback is used for altruistic TBF and the source of interference is a single dominant interferer.

Finally, we investigate and propose new techniques that can be applied to multi-antenna heterogeneous network scenarios for interference mitigation purposes.
ED:2013-03-13
INSSI record number: 45929
+ add basket
« previous | next »
INSSI