Power imbalance induced BER performance loss under limited-feedback CoMP techniques

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Haile, Beneyam B.
dc.contributor.author Hämäläinen, Jyri
dc.contributor.author Ding, Zhi
dc.date.accessioned 2017-05-11T09:14:32Z
dc.date.available 2017-05-11T09:14:32Z
dc.date.issued 2016-12-01
dc.identifier.citation Haile , B B , Hämäläinen , J & Ding , Z 2016 , ' Power imbalance induced BER performance loss under limited-feedback CoMP techniques ' EURASIP JOURNAL ON WIRELESS COMMUNICATIONS AND NETWORKING , vol 2016 , no. 1 , 212 . DOI: 10.1186/s13638-016-0697-y en
dc.identifier.issn 1687-1472
dc.identifier.issn 1687-1499
dc.identifier.other PURE UUID: ee59ade6-7050-4c52-bf73-07b43451d132
dc.identifier.other PURE ITEMURL: https://research.aalto.fi/en/publications/power-imbalance-induced-ber-performance-loss-under-limitedfeedback-comp-techniques(ee59ade6-7050-4c52-bf73-07b43451d132).html
dc.identifier.other PURE LINK: http://www.scopus.com/inward/record.url?scp=84986271139&partnerID=8YFLogxK
dc.identifier.other PURE FILEURL: https://research.aalto.fi/files/11520230/art_3A10.1186_2Fs13638_016_0697_y.pdf
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/25950
dc.description.abstract Coordinated multipoint (CoMP) technology utilizes simultaneous transmission/reception from/to different access points, and it is considered as an important feature to exploit and/or mitigate intercell interference in fourth-generation mobile networks. Yet, channel power imbalance at the receiver is experienced in CoMP systems due to, e.g., spatially distributed transmissions. Traditional co-located multi-antenna systems may also experience power imbalance among antenna branches due to inaccurate antenna calibration. This paper presents a bit error rate (BER) analysis and derives asymptotic and approximate BER expressions for some practical CoMP transmission techniques under channel power imbalance. Besides the analytical results, numerical analysis is made to thoroughly capture the performance impact of channel power imbalance on the performance gain of the CoMP methods. The results demonstrate that power imbalance considerably affects BER performance and applying long-term amplitude information with fast phase feedback has insignificant benefit to effectively compensate the detrimental effect of large channel power imbalance when base stations use a single antenna. In this case, exploiting both short-term amplitude and phase information is a very good choice. On the contrary, for a large number of diversity antennas in base stations, using long-term amplitude information with a sparsely quantized phase shows BER performance close to the case where full channel state information is applied. en
dc.format.extent 10
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation.ispartofseries EURASIP JOURNAL ON WIRELESS COMMUNICATIONS AND NETWORKING en
dc.relation.ispartofseries Volume 2016, issue 1 en
dc.rights openAccess en
dc.subject.other Signal Processing en
dc.subject.other Computer Science Applications en
dc.subject.other Computer Networks and Communications en
dc.subject.other 113 Computer and information sciences en
dc.title Power imbalance induced BER performance loss under limited-feedback CoMP techniques en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Department of Communications and Networking
dc.contributor.department University of California
dc.subject.keyword Bit error rate
dc.subject.keyword Channel power imbalance
dc.subject.keyword CoMP
dc.subject.keyword Coordinated multipoint
dc.subject.keyword Intercell interference
dc.subject.keyword LTE-advanced
dc.subject.keyword Transmit beamforming
dc.subject.keyword Signal Processing
dc.subject.keyword Computer Science Applications
dc.subject.keyword Computer Networks and Communications
dc.subject.keyword 113 Computer and information sciences
dc.identifier.urn URN:NBN:fi:aalto-201705114325
dc.identifier.doi 10.1186/s13638-016-0697-y
dc.type.version publishedVersion


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