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	1991
Abstract	Recently, studies on suboptimal 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) precoding. In practice, each antenna or more generally each antenna group has its own limit on the transmitted power, which makes per-antenna-group power constraints more meaningful than the sum power constraint. In this paper, we introduce an optimization technique for VP precoding employing the minimum mean-square error (MMSE) criterion with per-antenna-group power constraints. This technique is inspired by the p-sphere encoding in a sense that it involves finding the node with the lowest mean-square error (MSE) over a lattice. We demonstrate that the MSE metric, as well as the p-norm one, can be enclosed in a proper Frobenius-norm ball. This Frobenius-norm ball shrinks until it captures the perturbing vector minimizing the MSE. Numerical results show that the proposed algorithm outperforms conventional VP precoding and the p-sphere encoding, but at higher complexity. Consequently, we investigate a couple of simplified techniques employing the MMSE criterion, which perform almost as well as the proposed precoding technique, but are less complex.
Sponsorship	IEEE Signal Processing Society
Starting Page	3745
Ending Page	3751
Page Count	7
File Size	957216
File Format	PDF
ISSN	1053587X
Volume Number	61
Issue Number	15
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-08-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Vectors MIMO Encoding Transmitting antennas Receivers Downlink vector perturbation precoding $p$-sphere encoder minimum mean-square error (MMSE) vector perturbation multiple-input multiple-output broadcast channel (MIMO-BC) per-antenna-group power constraints
Content Type	Text
Resource Type	Article
Subject	Signal Processing Electrical and Electronic Engineering

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