Graduate School and Research Center in Digital Sciences

Joint user grouping and beamforming for low complexity massive MIMO systems

Chen, Junting; Gesbert, David

SPAWC 2016, 17th International IEEE Workshop on Signal Processing Advances in Wireless Communications, July 3-6, 2016, Edinburgh, UK

In massive MIMO systems, to partition users into groups and serve the groups separately can significantly reduce the processing complexity. In the existing literature, user grouping is done by classifying the channel covariance matrices. Consequently, the inter-group interference due to user grouping and per group processing is not taken into account. In addition, those methods only work for a fixed number of groups, and the optimal group number is hard to determine. In this paper, a joint user grouping and beamforming strategy is proposed to jointly optimize the number of groups, the user grouping, and the beamforming. The scheme is derived by maximizing the total expected signal-to-interference-leakage-and-noise-ratio (SLNR) lower bound in the network via two-timescale stochastic optimization techniques. Numerical results demonstrate significant sum rate performance gain over the baseline scheme in the literature.

Document Doi Bibtex

Title:Joint user grouping and beamforming for low complexity massive MIMO systems
Keywords:Massive MIMO, User grouping, Beamforming, Two-timescale stochastic optimization
Department:Communication systems
Eurecom ref:4970
Copyright: © 2016 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Bibtex: @inproceedings{EURECOM+4970, doi = {}, year = {2016}, title = {{J}oint user grouping and beamforming for low complexity massive {MIMO} systems}, author = {{C}hen, {J}unting and {G}esbert, {D}avid }, booktitle = {{SPAWC} 2016, 17th {I}nternational {IEEE} {W}orkshop on {S}ignal {P}rocessing {A}dvances in {W}ireless {C}ommunications, {J}uly 3-6, 2016, {E}dinburgh, {UK}}, address = {{E}dinburgh, {UNITED} {KINGDOM}}, month = {07}, url = {} }
See also: