• español
    • English
  • Login
  • English 
    • español
    • English
  • Publication Types
    • bookbook partconference objectdoctoral thesisjournal articlemagazinemaster thesispatenttechnical documentationtechnical report
View Item 
  •   IMDEA Networks Home
  • View Item
  •   IMDEA Networks Home
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Practical Interference Alignment in the Frequency Domain for OFDM-based Wireless Access Networks

Share
Files
Practical_Interference_Alignment_2014_EN .pdf (591.9Kb)
Identifiers
URI: http://hdl.handle.net/20.500.12761/1373
Metadata
Show full item record
Author(s)
Loch, Adrian; Nitsche, Thomas; Kuehne, Alexander; Hollick, Matthias; Widmer, Joerg; Klein, Anja
Date
2014-06-16
Abstract
Interference alignment(IA)is often considered in the spatial domain in combination with MIMO systems.In contrast, aligning interference in the frequency domain among multiple subcarriers can also benefit single-antenna OFDM-based access networks. It allows for flexible operation on a per-subcarrier basis. We investigate the achievable by frequency IA in practice for a scenario with multiple access points and clients. Previous work is predominantly theoretical and focuses on idealized cases where all nodes have the same average signal-to-noiseratio(SNR). On the contrary, in practical networks, nodes typically have heterogeneous SNRs depending on channel conditions, which might have a significant impact on IA performance. We tackle this problem by designing mechanisms that adaptively choose which nodes shall perform IA on which subcarriers depending on current channel conditions. We implement and validate our approach on software-defined radios. To the best of our knowledge, this is the first practical implementation of IA in the frequency domain. Our measurements show that (1) frequency IA is feasible in practice, and (2) choosing appropriate nodes and subcarriers overcomes the main limitations due to heterogeneous SNRs. Our mechanisms enable IA in scenarios where it would be infeasible otherwise, achieving throughput gains close to the 33% theoretical maximum.
Share
Files
Practical_Interference_Alignment_2014_EN .pdf (591.9Kb)
Identifiers
URI: http://hdl.handle.net/20.500.12761/1373
Metadata
Show full item record

Browse

All of IMDEA NetworksBy Issue DateAuthorsTitlesKeywordsTypes of content

My Account

Login

Statistics

View Usage Statistics

Dissemination

emailContact person Directory wifi Eduroam rss_feed News
IMDEA initiative About IMDEA Networks Organizational structure Annual reports Transparency
Follow us in:
Community of Madrid

EUROPEAN UNION

European Social Fund

EUROPEAN UNION

European Regional Development Fund

EUROPEAN UNION

European Structural and Investment Fund

© 2021 IMDEA Networks. | Accesibility declaration | Privacy Policy | Disclaimer | Cookie policy - We value your privacy: this site uses no cookies!