Algorithms for improper single-stream MIMO interference networks

David A. Schmidt, Wolfgang Utschick

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Scopus citations

Abstract

The max-SINR algorithm and a number of related algorithms have been shown to be very useful for determining good strategies in MIMO interference networks and achieving spatial interference alignment at high SNR. These algorithms, however, rely on being initialized with a proper configuration of streams per user, as they do not have the capability of reducing a user's power or deactivating users completely. Alternatively, algorithms for MIMO interference networks can be designed to perform power control, so that interference alignment can be achieved even from an improper initialization. In this paper, we examine one particularly promising such design. We discuss in detail an update procedure based on maximizing the own rate minus a linearized cost of causing interference to other users, a technique known as interference pricing for simplicity, we restrict our attention to the case of one stream per user. As previously proposed, we combine the pricing updates with a gradual increase of the transmit power or SNR, which greatly improves the numerical properties. We show with numerical experiments that in an improper system our proposed pricing algorithm with incremental SNR achieves better performance than other algorithms with power control; the fixed-power algorithms, such as the max-SINR algorithm, perform poorly at high SNR.

Original languageEnglish
Title of host publicationISWCS'11 - 2011 8th International Symposium on Wireless Communication Systems, Proceedings
PublisherVDE VERLAG GMBH
Pages251-255
Number of pages5
ISBN (Print)9781612844022
DOIs
StatePublished - 2011
Event2011 8th International Symposium on Wireless Communication Systems, ISWCS'11 - Aachen, Germany
Duration: 6 Nov 20119 Nov 2011

Publication series

NameProceedings of the International Symposium on Wireless Communication Systems
ISSN (Print)2154-0217
ISSN (Electronic)2154-0225

Conference

Conference2011 8th International Symposium on Wireless Communication Systems, ISWCS'11
Country/TerritoryGermany
CityAachen
Period6/11/119/11/11

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