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The two-hop MISO broadcast network with quantized delayed CSIT
KTH, School of Electrical Engineering (EES), Communication Theory.
KTH, School of Electrical Engineering (EES), Communication Theory.
KTH, School of Electrical Engineering (EES), Communication Theory. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.ORCID iD: 0000-0002-5407-0835
KTH, School of Electrical Engineering (EES), Communication Theory.ORCID iD: 0000-0002-7926-5081
2013 (English)In: 2013 IEEE Wireless Communications and Networking Conference (WCNC), IEEE Communications Society, 2013, 3022-3027 p.Conference paper, Published paper (Refereed)
Abstract [en]

We consider a downlink two-hop MISO broadcast network with a 2-antenna source communicating to 2 singleantenna destinations, assisted by 2 single-antenna intermediate relays. We investigate spectrally efficient transmission schemes and their achieved sum degrees of freedom (DoF), with quantized delayed channel state information (CSI) feedback. Assuming Grassmannian vector quantization, we study two feedback scenarios according to the feedback range limit, namely global-range feedback, i.e., the source can receive the feedback signals from both the relays and the destinations, and one-hop-range feedback, i.e., each node can only attain the feedback information of its upcoming hop. We establish a sum DoF lower bound for each case. Our results reveal that when the quantization rate at relays BR= α1log2(SNR) and at destinations BD = α2log2(SNR) for min 1, α2} ≥ 1, the optimal sum DoF 4/3 can be achieved with finite-rate delayed feedback.

Place, publisher, year, edition, pages
IEEE Communications Society, 2013. 3022-3027 p.
Series
IEEE Wireless Communications and Networking Conference. Proceedings, ISSN 1525-3511
Keyword [en]
Broadcast Networks, Channel state information feedbacks, Delayed CSIT, Delayed feedback, Feed back information, Feedback signal, Lower bounds, Transmission schemes
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-105505DOI: 10.1109/WCNC.2013.6555043ISI: 000326048103017Scopus ID: 2-s2.0-84881602236ISBN: 978-146735939-9 (print)OAI: oai:DiVA.org:kth-105505DiVA: diva2:571195
Conference
2013 IEEE Wireless Communications and Networking Conference, WCNC 2013; Shanghai; China; 7 April 2013 through 10 April 2013
Note

QC 20121207

Available from: 2013-07-10 Created: 2012-11-21 Last updated: 2014-06-10Bibliographically approved

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Xiao, MingSkoglund, Mikael

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