Improved Linear Transmit Processing for Single-User and Multi-User MIMO Communications Systems

Research output: Contribution to journalArticle

Abstract

In this paper, we propose a novel linear transmit precoding strategy for multiple-input, multiple-output (MIMO) systems employing improper signal constellations. In particular, improved zero-forcing (ZF) and minimum mean square error (MMSE) precoders are derived based on modified cost functions, and are shown to achieve a superior performance without loss of spectrum efficiency compared to the conventional linear and nonlinear precoders. The superiority of the proposed precoders over the conventional solutions are verified by both simulation and analytical results. The novel approach to precoding design is also applied to the case of an imperfect channel estimate with a known error covariance as well as to the multi-user scenario where precoding based on the nullspace of channel transmission matrix is employed to decouple multi-user channels. In both cases, the improved precoding schemes yield significant performance gain compared to the conventional counterparts.

Original languageEnglish
Pages (from-to)1768-1779
Number of pages12
JournalIEEE Transactions on Signal Processing
Volume58
Issue number3
DOIs
Publication statusPublished - Mar 2010

Cite this

@article{e16b54b2c44d43078e3e6af402a88a67,
title = "Improved Linear Transmit Processing for Single-User and Multi-User MIMO Communications Systems",
abstract = "In this paper, we propose a novel linear transmit precoding strategy for multiple-input, multiple-output (MIMO) systems employing improper signal constellations. In particular, improved zero-forcing (ZF) and minimum mean square error (MMSE) precoders are derived based on modified cost functions, and are shown to achieve a superior performance without loss of spectrum efficiency compared to the conventional linear and nonlinear precoders. The superiority of the proposed precoders over the conventional solutions are verified by both simulation and analytical results. The novel approach to precoding design is also applied to the case of an imperfect channel estimate with a known error covariance as well as to the multi-user scenario where precoding based on the nullspace of channel transmission matrix is employed to decouple multi-user channels. In both cases, the improved precoding schemes yield significant performance gain compared to the conventional counterparts.",
author = "Pei Xiao and Mathini Sellathurai",
year = "2010",
month = "3",
doi = "10.1109/TSP.2009.2037347",
language = "English",
volume = "58",
pages = "1768--1779",
journal = "IEEE Transactions on Signal Processing",
issn = "1053-587X",
publisher = "IEEE",
number = "3",

}

Improved Linear Transmit Processing for Single-User and Multi-User MIMO Communications Systems. / Xiao, Pei; Sellathurai, Mathini.

In: IEEE Transactions on Signal Processing, Vol. 58, No. 3, 03.2010, p. 1768-1779.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Improved Linear Transmit Processing for Single-User and Multi-User MIMO Communications Systems

AU - Xiao, Pei

AU - Sellathurai, Mathini

PY - 2010/3

Y1 - 2010/3

N2 - In this paper, we propose a novel linear transmit precoding strategy for multiple-input, multiple-output (MIMO) systems employing improper signal constellations. In particular, improved zero-forcing (ZF) and minimum mean square error (MMSE) precoders are derived based on modified cost functions, and are shown to achieve a superior performance without loss of spectrum efficiency compared to the conventional linear and nonlinear precoders. The superiority of the proposed precoders over the conventional solutions are verified by both simulation and analytical results. The novel approach to precoding design is also applied to the case of an imperfect channel estimate with a known error covariance as well as to the multi-user scenario where precoding based on the nullspace of channel transmission matrix is employed to decouple multi-user channels. In both cases, the improved precoding schemes yield significant performance gain compared to the conventional counterparts.

AB - In this paper, we propose a novel linear transmit precoding strategy for multiple-input, multiple-output (MIMO) systems employing improper signal constellations. In particular, improved zero-forcing (ZF) and minimum mean square error (MMSE) precoders are derived based on modified cost functions, and are shown to achieve a superior performance without loss of spectrum efficiency compared to the conventional linear and nonlinear precoders. The superiority of the proposed precoders over the conventional solutions are verified by both simulation and analytical results. The novel approach to precoding design is also applied to the case of an imperfect channel estimate with a known error covariance as well as to the multi-user scenario where precoding based on the nullspace of channel transmission matrix is employed to decouple multi-user channels. In both cases, the improved precoding schemes yield significant performance gain compared to the conventional counterparts.

U2 - 10.1109/TSP.2009.2037347

DO - 10.1109/TSP.2009.2037347

M3 - Article

VL - 58

SP - 1768

EP - 1779

JO - IEEE Transactions on Signal Processing

JF - IEEE Transactions on Signal Processing

SN - 1053-587X

IS - 3

ER -