NDLI: On MMSE vector-perturbation precoding for MIMO broadcast channels with per-antenna-group power constraints

Content Provider	IEEE Xplore Digital Library
Author	Mazrouei-Sebdani, M. Krzymien, W.A.
Copyright Year	2012
Description	Author affiliation: University of Alberta / TRLabs, Edmonton, AB, Canada, T6G 2V4 (Mazrouei-Sebdani, M.; Krzymien, W.A.)
Abstract	Recently, studies on sub-optimal precoding techniques for multiple-input multiple-output broadcast channels (MIMO-BC), which achieve performance near to that of the dirty paper coding (DPC), have drawn attention to vector perturbation (VP). In practice, each antenna or more generally each antenna group has its own limit on the transmitted power, which makes per-antenna-group (per-AG) power constraints more meaningful than the sum power constraint. In this paper, we assume the per-antenna-group constraints and first investigate antenna-group power-constrained VP inspired by the p-sphere encoder for the case when channel inversion is used by the front-end linear precoder. Furthermore, we consider joint optimization of the front-end precoder and the perturbing vector subject to per-AG power constraints and propose precoding based on a minimum mean square error (MMSE) criterion. The results show that the proposed algorithm outperforms conventional VP and the p-sphere encoding in the case of per-AG power constraints.
Starting Page	4841
Ending Page	4845
File Size	216782
Page Count	5
File Format	PDF
ISBN	9781457720529
ISSN	15503607
e-ISBN	9781457720536
e-ISBN	9781457720512
DOI	10.1109/ICC.2012.6364097
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-06-10
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Vectors Lattices Encoding MIMO Optimization Bit error rate Transmitting antennas
Content Type	Text
Resource Type	Article

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