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A multiuser downlink system combining limited feedback and channel correlation information
KTH, School of Electrical Engineering (EES), Signal Processing. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.
School of Information Science and Engineering, Southeast University, Nanjing, China.
KTH, School of Electrical Engineering (EES), Signal Processing. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.ORCID iD: 0000-0002-3599-5584
KTH, School of Electrical Engineering (EES), Signal Processing. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.ORCID iD: 0000-0003-2298-6774
2010 (English)In: IEEE International Conference on Communications, 2010, 1-5 p.Conference paper, Published paper (Refereed)
Abstract [en]

We address the problem of combining limited feedback information with long-term channel statistical information in the design of downlink SDMA schemes. A novel combining method is developed to improve the quality of channel knowledge at the base station. More specifically, a set of novel feedback parameters is proposed and a related method is developed to estimate a representation of the multiuser channel vectors at the base station. This method utilizes the hybrid information by combining instantaneous channel feedback and long-term channel statistics, and is based on a channel phase codebook designed using the generalized Lloyd algorithm. The estimated channel knowledge at the base station can be used for joint design of multiuser precoding and opportunistic scheduling. The advantage of the proposed scheme over existing CSI quantization based SDMA schemes is further confirmed by computer simulations.

Place, publisher, year, edition, pages
2010. 1-5 p.
Series
IEEE International Conference on Communications, ISSN 1550-3607
Keyword [en]
Channel correlation, Channel feedbacks, Channel knowledge, Channel phase, Channel statistics, Codebooks, Combining method, Downlink systems, Feedback parameters, Generalized Lloyd algorithm, Joint designs, Limited feedback, Multi-user, Multi-user channel, Multi-user precoding, Opportunistic scheduling, Statistical information, Base stations, Communication channels (information theory), Computer simulation, Regression analysis, Space division multiple access, Channel state information
National Category
Telecommunications
Identifiers
URN: urn:nbn:se:kth:diva-35642DOI: 10.1109/ICC.2010.5502116ISI: 000287029400050Scopus ID: 2-s2.0-77955356223OAI: oai:DiVA.org:kth-35642DiVA: diva2:429577
Conference
2010 IEEE International Conference on Communications Cape Town, SOUTH AFRICA, MAY 23-27, 2010
Note
QC 20110705Available from: 2011-07-05 Created: 2011-07-04 Last updated: 2012-01-23Bibliographically approved

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Bengtsson, MatsOttersten, Björn

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