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A precoding compensation scheme for heterogeneous communication networks with CSI feedback delay
journal contribution
posted on 2020-07-07, 00:00 authored by Lin Bai, Jiaxing Wang, Rui Han, Dongquan Li, Jianwei Liu, Jinho ChoiJinho ChoiIn the 5th generation cellular systems, heterogeneous communication networks allow multiple base stations (BSs) to serve the users cooperatively, which can satisfy the requirement of growing data rate and optimum coverage. However, suffering from the imperfect channel state information (CSI) feedback, optimal performance may not be guaranteed for coordinated multiple point (CoMP) scenarios when certain users are served by multiple BSs, simultaneously. To this end, it is essential to develop transmission schemes with imperfect CSI to improve the performance in CoMP systems. Under the circumstance that an edge user is served by a primary BS and coordinated BS with the same time-frequency resource, at which the CSI can be outdated at the coordinated BS, in this paper, we propose a precoding compensation scheme at the primary BS to eliminate the interference caused by outdated CSI at the coordinated BSs. Two algorithms, namely, maximum signal-to-interference-plus-noise ratio (MaxSINR) and minimum-mean-square-error (MMSE), are proposed for the precoding at the transmitter and the detection at the receiver, respectively, to further improve the performance as well as mitigate the interference. Simulation results show that our proposed transmission scheme is able to provide sufficiently good performance comparing to that of the perfect CSI feedback scenario.
History
Journal
IEEE Transactions on Network Science and EngineeringIssue
(Early Access)Publisher
Institute of Electrical and Electronics Engineers (IEEE)Publisher DOI
ISSN
2334-329XeISSN
2327-4697Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2020, IEEEUsage metrics
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No categories selectedKeywords
heterogeneous communication networkscoordinated multiple pointinterference cancellationchannel state informationprecoding compensationScience & TechnologyTechnologyPhysical SciencesEngineering, MultidisciplinaryMathematics, Interdisciplinary ApplicationsEngineeringMathematicsPrecodingInterferenceCommunication networksHeterogeneous networksDelaysTime-frequency analysisINTERFERENCE ALIGNMENTRESOURCE-ALLOCATIONRELAY NETWORKSNOMA SYSTEMSTRANSMISSIONOPTIMIZATION
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