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An ordering scheme exploiting modulation information for tree search based detection in interference-limited MIMO systems
Publikationstyp
Journal Article
Date Issued
2013-02-10
Sprache
English
Author(s)
Institut
TORE-URI
Volume
2
Issue
1
Start Page
2
End Page
5
Article Number
6415958
Citation
IEEE Wireless Communications Letters 1 (2): Art.-Nr. 6415958 i.e. Seite 2-5 (2013)
Publisher DOI
Scopus ID
Publisher
IEEE
The well-known vertical Bell Labs layered space-time (V-BLAST) ordering has been widely employed for tree search algorithms such as sphere decoder. The V-BLAST ordering was derived under the assumption that all transmitted symbols utilize the same modulation. In an interference-limited scenario, a cell-edge user probably receives serving and interfering signals with different modulations. In this case, the conventional V-BLAST ordering does not provide a satisfactory solution for complexity reduction. This letter shows how to incorporate the modulation information into the V-BLAST ordering to significantly reduce the complexity of the tree search algorithms. Simulation results show the new ordering based sphere decoder can provide a better trade-off between complexity (e.g., in terms of operations) and performance (e.g., in terms of throughput or error rate) in the interference-limited scenario. © 2013 IEEE.
Subjects
detection ordering
inter-cell interference
joint detection
MIMO systems
sphere decoder
V-BLAST
DDC Class
380: Handel, Kommunikation, Verkehr
600: Technik
620: Ingenieurwissenschaften