Quantized Feedback Design for MIMO Broadcast Channels

Author

Kim, Tony T. ; Bengtsson, Martin ; Skoglund, Mikael

Author_Institution

Sch. of Electr. Eng., R. Inst. of Technol., Stockholm, Sweden

Volume

3

fYear

2007

fDate

15-20 April 2007

Abstract

Low-rate feedback design for multiple-input multiple-output broadcast channels is studied under a vector quantization framework. Iterative algorithms are proposed to design the partial feedback link, the scheduler, and the linear precoding codebook. It is demonstrated that the gain due to multi-user diversity can be significant even with heavily quantized channel state information at the transmitter. Our results highlight the potential of multi-user diversity, even with simple schemes and extremely-low-rate feedback.

Keywords

MIMO communication; broadcast channels; diversity reception; linear codes; multiuser channels; precoding; vector quantisation; MIMO broadcast channels; linear precoding codebook; low-rate feedback design; multiple-input multiple-output broadcast channels; multiuser diversity; quantized channel state information; quantized feedback design; transmitter; vector quantization framework; Algorithm design and analysis; Broadcast technology; Broadcasting; Channel state information; Feedback; Iterative algorithms; MIMO; Signal to noise ratio; Transmitters; Vector quantization; Fading channels; broadcast channels; feedback communications; information rates; quantization;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech and Signal Processing, 2007. ICASSP 2007. IEEE International Conference on

Conference_Location

Honolulu, HI

ISSN

1520-6149

Print_ISBN

1-4244-0727-3

Type

conf

DOI

10.1109/ICASSP.2007.366457

Filename

4217631