A transmit-diversity coding framework for cellular systems

Author

Godbout, Michaeël ; Leib, Harry

Author_Institution

Dept. of Electr. & Comput. Eng., McGill Univ., Montreal, Que., Canada

Volume

1

fYear

2001

fDate

2001

Firstpage

117

Abstract

Space-time (ST) coding is an efficient technique for combatting short-term fading in telecommunication systems with multiple transmit antennas. This paper presents a multi-dimensional framework for such a system that contrasts two approaches for assigning signal dimensions to antennas. With aggregate transmit antennas (ATA), a dimension is employed by all the antennas while in orthogonal transmit antennas (OTA), each dimension is employed by a single transmit antenna. We provide a diversity order analysis for repetition codes and Tarokh-Seshadri-Calderbank (see IEEE Transactions on Information Theory, vol.44, p.744-64, 1998) codes within our framework over a spatially uncorrelated, block-fading Rayleigh channel. Simulation results for repetition, TSC, and classical convolutional codes using both OTA and ATA transmission are presented. With ATA, classical convolutional codes perform comparably to the known TSC codes, while with OTA diversity gain is easier to obtain than with ATA. All the codes that were considered in this work with OTA show performance gains with respect to ATA

Keywords

Rayleigh channels; antenna arrays; cellular radio; convolutional codes; diversity reception; transmitting antennas; TSC codes; Tarokh-Seshadri-Calderbank codes; aggregate transmit antennas; block-fading Rayleigh channel; cellular systems; coding gain; convolutional codes; diversity gain; diversity order analysis; multiple transmit antennas; orthogonal transmit antennas; performance; repetition codes; short-term fading; signal dimension assignment; simulation results; space-time coding; spatially uncorrelated channel; telecommunication systems; transmit-diversity coding; Aggregates; Convolutional codes; Diversity methods; Diversity reception; Fading; MIMO; Proposals; Receiving antennas; Telecommunications; Transmitting antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical and Computer Engineering, 2001. Canadian Conference on

Conference_Location

Toronto, Ont.

ISSN

0840-7789

Print_ISBN

0-7803-6715-4

Type

conf

DOI

10.1109/CCECE.2001.933669

Filename

933669