Link adaptation in a multi-antenna system

Author

Jungnickel, Volker ; Haustein, Thomas ; Pohl, Volker ; Von Helmolt, Clemens

Author_Institution

Fraunhofer Institut fur Nachrichtentechnik Heinrich-Hertz-Institut, Berlin, Germany

Volume

2

fYear

2003

Firstpage

862

Abstract

We consider link adaptation for multi-antenna systems based on channel information also that at the transmitter. Using adaptive channel inversion (ACI), a step-wise trade-off between spatial multiplexing and diversity is realized. Due to pre- and post-processing, the channel is corrupted only by Gaussian noise in front of the detectors. By jointly optimizing the number of data streams and the common modulation, a nearly continuous adaptation of spectral efficiency is realized. Up to moderate powers, the channel capacity is approached in regular and singular MIMO channels, provided that scalar coding is applied.

Keywords

Gaussian noise; MIMO systems; antenna arrays; channel capacity; diversity reception; encoding; multiplexing; optimisation; radio transmitters; Gaussian noise; adaptive channel inversion; channel capacity; channel information; data streams optimization; link adaptation; multiantenna system; scalar coding; singular MIMO channels; spatial multiplexing; spectral efficiency adaptation; step-wise trade-off; transmitter; Channel capacity; Detectors; Eigenvalues and eigenfunctions; Gaussian noise; Information theory; MIMO; Matrix decomposition; Power control; Radio link; Radio transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2003. VTC 2003-Spring. The 57th IEEE Semiannual

ISSN

1090-3038

Print_ISBN

0-7803-7757-5

Type

conf

DOI

10.1109/VETECS.2003.1207748

Filename

1207748