Interference Alignment over a Combination of Space and Frequency
2013 (English)In: 2013 IEEE International Conference on Communications Workshops, ICC 2013, IEEE Communications Society, 2013, 149-153 p.Conference paper (Refereed)
Time or frequency extensions are integral in most information theoretic studies of interference alignment (IA), but a large majority of the more practically oriented studies have focused on narrowband space-only schemes. As wideband systems are now common, it is natural to investigate IA for frequency extended multiple antenna systems where precoding is performed over a combination of space and frequency dimensions. For this setting, we derive a necessary condition on IA feasibility using the properness framework and investigate the sum rate performance using simulations. Applying frequency extensions to multiple antenna systems allows for some additional users to be served interference-free, but our numerical results with synthetic channels indicate a practically more important improvement in terms of a power gain. Emulating a particular scenario using channel measurements, with real-world path losses and channel correlations, we see similar performance gains.
Place, publisher, year, edition, pages
IEEE Communications Society, 2013. 149-153 p.
interference alignment, frequency extensions, space-frequency precoding, mimo, ofdm, channel measurements
IdentifiersURN: urn:nbn:se:kth:diva-119279DOI: 10.1109/ICCW.2013.6649218ScopusID: 2-s2.0-84890878723ISBN: 978-146735753-1OAI: oai:DiVA.org:kth-119279DiVA: diva2:610509
IEEE International Conference on Communications 2013: IEEE ICC'13 - Workshop Beyond LTE-A, Budapest, June 9-13, 2013
FunderEU, FP7, Seventh Framework Programme, 265578
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QC 201304302013-04-302013-03-112014-02-04Bibliographically approved