IMDEA Networks Institute Publications Repository

CSI Feedback in OFDMA Wireless Networks with Multiple Sender-Receiver Pairs

Loch, Adrian and Hollick, Matthias and Nitsche, Thomas and Widmer, Joerg and Kuehne, Alexander and Anja, Klein (2013) CSI Feedback in OFDMA Wireless Networks with Multiple Sender-Receiver Pairs. In: The 14th IEEE International Workshop on Signal Processing Advances for Wireless Communications (IEEE SPAWC 2013), 16 - 19 June 2013, Darmstadt, Germany.

[img]
Preview
PDF (CSI Feedback in OFDMA Wireless Networks with Multiple Sender-Receiver Pairs) - Published Version
Download (239Kb) | Preview

Abstract

In wired or wireless distribution systems, as well as wireless mesh networks, multiple senders often need to deliver data to multiple receivers in the same interference domain. OFDMA enables interference avoidance by assigning disjoint sets of subcarriers to each sender. However, optimal subcarrier allocation requires CSI feedback to the transmitters, thus in-curring overhead. We evaluate an allocation mechanism inspired in subcarrier switching techniques, which allows nodes to locally decide which subcarriers they prefer. Hence, feedback is minimal, as only preference values need to be shared. We implement this approach on software defined radios and compare it to standard CSI feedback mechanisms. Despite our approach only requires local information, the results show that it performs close to an ideal solution based on full CSI knowledge.

Item Type: Conference or Workshop Papers (Poster)
Subjects: UNSPECIFIED
Divisions: UNSPECIFIED
Depositing User: Thomas Nitsche
Date Deposited: 25 Sep 2013 10:39
Last Modified: 02 Dec 2014 12:34
URI: http://eprints.networks.imdea.org/id/eprint/589

Actions (login required)

View Item View Item