Design of adaptive modulation in MIMO systems using outdated CSI

Author

Zhou, Zhendong ; Vucetic, Branka ; Chen, Zhuo ; Li, Yonghui

Author_Institution

Sch. of Electr. & Inf. Eng., Sydney Univ., NSW

Volume

2

fYear

2005

fDate

11-14 Sept. 2005

Firstpage

1101

Abstract

In this paper, we first address the effects of the feedback delay on a variable-rate variable-power adaptive modulation MIMO system that is designed under a perfect channel state information (CSI) assumption. Closed-form expressions for the average bit error rate (BER) and average spectral efficiency (ASE) are derived. Based on that, simple but effective adaptive modulation designs using the outdated instantaneous CSI and time correlation coefficient are proposed based on the signal-to-interference and noise ratio (SINK) and BER analysis. Analytical and simulation results show that these designs provide good trade-offs between the ASE and BER in an adaptive way, and make the adaptive MIMO system much more robust to the CSI imperfection

Keywords

MIMO systems; adaptive modulation; antenna arrays; correlation theory; error statistics; ASE; BER; CSI; adaptive modulation MIMO system; average bit error rate; average spectral efficiency; closed-form expression; perfect channel state information; time correlation coefficient; Adaptive systems; Bit error rate; Channel state information; Closed-form solution; Delay effects; MIMO; Signal analysis; Signal design; Signal to noise ratio; State feedback;

fLanguage

English

Publisher

ieee

Conference_Titel

Personal, Indoor and Mobile Radio Communications, 2005. PIMRC 2005. IEEE 16th International Symposium on

Conference_Location

Berlin

Print_ISBN

9.7838007291e+012

Type

conf

DOI

10.1109/PIMRC.2005.1651611

Filename

1651611