Block Diagonalization in the MIMO Broadcast Channel with Delayed CSIT

Jun Zhang; Jeffrey G. Andrews; Robert W. Heath

doi:10.1109/GLOCOM.2009.5426132

Block Diagonalization in the MIMO Broadcast Channel with Delayed CSIT

Jun Zhang, Jeffrey G. Andrews, Robert W. Heath

Research output: Chapter in book / Conference proceeding › Conference article published in proceeding or book › Academic research › peer-review

26 Citations (Scopus)

Abstract

This paper investigates the impact of delayed channel state information at the transmitter (CSIT) on the MIMO broadcast channel with block diagonalization (BD) precoding. First, an upper bound for the achievable throughput is provided, which shows that BD is more robust to imperfect CSIT than zero-forcing precoding as it has fewer inter-user interfering streams. Due to residual inter-user interference, the throughput of BD still saturates at high SNR, which motivates switching between single-user and multi-user precoding. An accurate closed-form approximation is derived for the achievable throughput of the BD system, which provides guidance on the preferred transmission technique for a given scenario.

Original language	English
Title of host publication	GLOBECOM 2009 - 2009 IEEE Global Telecommunications Conference
DOIs	https://doi.org/10.1109/GLOCOM.2009.5426132
Publication status	Published - 1 Dec 2009
Externally published	Yes
Event	2009 IEEE Global Telecommunications Conference, GLOBECOM 2009 - Honolulu, HI, United States Duration: 30 Nov 2009 → 4 Dec 2009

Publication series

Name	GLOBECOM - IEEE Global Telecommunications Conference

Conference

Conference	2009 IEEE Global Telecommunications Conference, GLOBECOM 2009
Country/Territory	United States
City	Honolulu, HI
Period	30/11/09 → 4/12/09

ASJC Scopus subject areas

Electrical and Electronic Engineering

More information

10.1109/GLOCOM.2009.5426132

Cite this

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title = "Block Diagonalization in the MIMO Broadcast Channel with Delayed CSIT",

abstract = "This paper investigates the impact of delayed channel state information at the transmitter (CSIT) on the MIMO broadcast channel with block diagonalization (BD) precoding. First, an upper bound for the achievable throughput is provided, which shows that BD is more robust to imperfect CSIT than zero-forcing precoding as it has fewer inter-user interfering streams. Due to residual inter-user interference, the throughput of BD still saturates at high SNR, which motivates switching between single-user and multi-user precoding. An accurate closed-form approximation is derived for the achievable throughput of the BD system, which provides guidance on the preferred transmission technique for a given scenario.",

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Zhang, J, Andrews, JG & Heath, RW 2009, Block Diagonalization in the MIMO Broadcast Channel with Delayed CSIT. in GLOBECOM 2009 - 2009 IEEE Global Telecommunications Conference., 5426132, GLOBECOM - IEEE Global Telecommunications Conference, 2009 IEEE Global Telecommunications Conference, GLOBECOM 2009, Honolulu, HI, United States, 30/11/09. https://doi.org/10.1109/GLOCOM.2009.5426132

Block Diagonalization in the MIMO Broadcast Channel with Delayed CSIT. / Zhang, Jun; Andrews, Jeffrey G.; Heath, Robert W.
GLOBECOM 2009 - 2009 IEEE Global Telecommunications Conference. 2009. 5426132 (GLOBECOM - IEEE Global Telecommunications Conference).

Research output: Chapter in book / Conference proceeding › Conference article published in proceeding or book › Academic research › peer-review

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AB - This paper investigates the impact of delayed channel state information at the transmitter (CSIT) on the MIMO broadcast channel with block diagonalization (BD) precoding. First, an upper bound for the achievable throughput is provided, which shows that BD is more robust to imperfect CSIT than zero-forcing precoding as it has fewer inter-user interfering streams. Due to residual inter-user interference, the throughput of BD still saturates at high SNR, which motivates switching between single-user and multi-user precoding. An accurate closed-form approximation is derived for the achievable throughput of the BD system, which provides guidance on the preferred transmission technique for a given scenario.

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Block Diagonalization in the MIMO Broadcast Channel with Delayed CSIT

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