An analytical comparison of partial power-feedback designs for MIMO block fading channels

Author

Lau, Vincent K N

Author_Institution

Lucent Technol. Bell Labs., Whippany, NJ, USA

Volume

52

Issue

5

fYear

2004

fDate

5/1/2004 12:00:00 AM

Firstpage

691

Lastpage

693

Abstract

It has been shown that with perfect feedback (CSIT), the optimal multiple input/multiple output (MIMO) transmission strategy is a cascade of channel encoder banks, power control matrix, and eigen-beamforming matrix. However, the feedback capacity requirement for perfect CSIT is 2n_T×n_R, which is not scalable with respect to n_T or n_R. In this letter, we shall compare the performance of two levels of partial power-feedback strategies, namely, the scalar symmetric feedback and the vector feedback, for MIMO block fading channels. Unlike quasi-static fading, variable rate encoding is not needed for block fading channels to achieve the optimal channel capacity.

Keywords

3G mobile communication; MIMO systems; channel capacity; channel coding; fading channels; feedback; matrix algebra; multipath channels; variable rate codes; channel capacity; channel encoder banks; eigen-beamforming matrix; fading channels; feedback capacity; multiple input multiple output transmission; partial power feedback designs; power control matrix; scalar symmetric feedback; vector feedback; Array signal processing; Channel capacity; Covariance matrix; Fading; MIMO; Output feedback; Power control; Signal to noise ratio; Symmetric matrices; Transmitting antennas; MIMO; Multiple input/multiple output; capacity with partial feedback; feedback; multiple input/multiple output;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/TCOMM.2004.826253

Filename

1299055