Lattice code decoder for space-time codes

Author

Damen, Oussama ; Chkeif, Ammar ; Belfiore, Jean-Claude

Author_Institution

Ecole Nat. Superieure des Telecommun., Paris, France

Volume

4

Issue

5

fYear

2000

fDate

5/1/2000 12:00:00 AM

Firstpage

161

Lastpage

163

Abstract

We explore the lattice sphere packing representation of a multi-antenna system and the algebraic space-time (ST) codes. We apply the sphere decoding (SD) algorithm to the resulted lattice code. For the uncoded system, SD yields, with small increase in complexity, a huge improvement over the well-known V-BLAST detection algorithm. SD of algebraic ST codes exploits the full diversity of the coded multi-antenna system, and makes the proposed scheme very appealing to take advantage of the richness of the multi-antenna environment. The fact that the SD does not depend on the constellation size, gives rise to systems with very high spectral efficiency, maximum-likelihood performance, and low decoding complexity.

Keywords

Rayleigh channels; algebraic codes; computational complexity; maximum likelihood decoding; receiving antennas; signal detection; transmitting antennas; Rayleigh fading channel; V-BLAST detection algorithm; algebraic space-time codes; coded multi-antenna system; high spectral efficiency; lattice code decoder; lattice sphere packing representation; low decoding complexity; maximum likelihood decoding; maximum-likelihood performance; receiving antenna; sphere decoding algorithm; transmitting antenna; uncoded system; Constellation diagram; Detection algorithms; Fading; Lattices; Maximum likelihood decoding; Maximum likelihood detection; Receiving antennas; Space time codes; Transmitters; Transmitting antennas;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/4234.846498

Filename

846498