Bandwidth Efficiency of Practical MIMO-OFDM Systems with Adaptive MIMO Schemes

Author

Camargo, Alfonso ; Yao, Dachuan ; Czylwik, Andreas

Author_Institution

Dept. of Commun. Syst. (NTS), Univ. of Duisburg-Essen, Duisburg, Germany

fYear

2009

fDate

14-18 June 2009

Firstpage

1

Lastpage

5

Abstract

This paper considers the practical multiple-input multiple-output systems with orthogonal frequency division multiplexing (MIMO-OFDM) and bit-interleaved coded modulation (BICM) in spatially correlated broadband channels. Using link adaption techniques, the MIMO scheme that better exploits the space and frequency characteristics of the encountered channel condition is selected. It is shown that the bandwidth efficiency is increased compared to systems with fixed MIMO schemes in all propagation scenarios, while maintaining a predefined link quality. Furthermore, the adaptive transmission in channels with low spatial correlation can attain the complete multiplexing gain, whereas the finite set of modulation and coding schemes restricts the multiplexing gain that can be extracted when the spatial correlation is large.

Keywords

MIMO communication; OFDM modulation; bandwidth allocation; channel coding; interleaved codes; MIMO-OFDM system; adaptive MIMO scheme; bandwidth efficiency; bit-interleaved coded modulation; broadband channel; channel condition; coding scheme; frequency characteristic; link adaption technique; modulation scheme; multiple-input multiple-output system; orthogonal frequency division multiplexing; Adaptive systems; Antennas and propagation; Bandwidth; MIMO; Modulation coding; OFDM modulation; Radio transmitters; Receiving antennas; Samarium; Transmitting antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, 2009. ICC '09. IEEE International Conference on

Conference_Location

Dresden

ISSN

1938-1883

Print_ISBN

978-1-4244-3435-0

Electronic_ISBN

1938-1883

Type

conf

DOI

10.1109/ICC.2009.5198776

Filename

5198776