Capacity-optimal training for space-time modulation over a time-varying channel

Author

Peel, Christian B. ; Swindlehurst, A. Lee

Author_Institution

Dept. of Electr. and Comput. Eng., Brigham Young Univ., Provo, UT, USA

Volume

5

fYear

2003

fDate

11-15 May 2003

Firstpage

3036

Abstract

Using a model based on the time-autocorrelation function for time-varying MIMO channels, we find a lower bound on capacity for trained modulation, and find the training signal, training power, and length of training signal which maximize this bound. An approximation for the training frequency that maximizes the bound at high SNR is given for Jakes´ fading model. The capacity for differential unitary space-time modulation is discussed and compared with that for trained modulation. We present several numerical examples to illustrate our results.

Keywords

MIMO systems; antenna arrays; channel estimation; fading channels; least mean squares methods; mobile radio; modulation; signal processing; time-varying channels; transmitting antennas; Jakes´ fading model; MIMO channels; MMSE channel estimator; capacity-optimal training; differential modulation; minimum mean-square-error; mobile wireless data links; multiple-antenna channels; multiple-input multiple-output; space-time modulation; time-autocorrelation function; time-varying channel; trained modulation; training frequency; training power; training signal length; transmit antennas; Additive noise; Bandwidth; Channel estimation; Fading; Frequency; MIMO; Power engineering and energy; Power engineering computing; Receiving antennas; Time-varying channels;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, 2003. ICC '03. IEEE International Conference on

Conference_Location

Anchorage, AK

Print_ISBN

0-7803-7802-4

Type

conf

DOI

10.1109/ICC.2003.1203967

Filename

1203967