Multi-degree adaptive cyclic delay diversity with multi-user scheduling

Jingxiu Liu, Xiaoming She, Lan Chen, Hidekazu Taoka, Kenichi Higuchi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

Multi-carrier based radio access schemes have been widely accepted as one of the PHY candidates in many standards, for their capabilities not only to combat multi-path propagation, but also to support multiple user access aided by multi-user scheduling. The performance of multi-user wireless system with multi-user scheduling depends on the fluctuation of independent channel response across different users. However, the channel selectivity may be limited in some channel conditions, e.g., light-of-sight (LOS) or spatial correlation, which may limit the multi-user diversity gain. Multi-degree random cyclic delay diversity (MD-RCDD) [9] scheme is introduced to obtain opportunistic beamforming gain with intensified frequency fluctuation of channel response. However, the available delay sets in MD-CDD are randomly generated, not fully utilizing the spatial resources. Therefore, multi-degree adaptive cyclic delay diversity (MD-ACDD) scheme is proposed in this paper to further optimize the system performance, in which the available delay sets are channel-dependent, and generated based on the feedback information of all users. Moreover, the detailed working procedure and overhead analysis are presented, and simulation results show that proposed scheme can achieve significant performance gain comnared with conventional MD-RCDD.

Original languageEnglish
Title of host publication2008 IEEE 67th Vehicular Technology Conference-Spring, VTC
Pages1181-1185
Number of pages5
DOIs
Publication statusPublished - 28 Jul 2008
Event2008 IEEE 67th Vehicular Technology Conference-Spring, VTC - Marina Bay, Singapore
Duration: 11 May 200814 May 2008

Publication series

NameIEEE Vehicular Technology Conference
ISSN (Print)1550-2252

Conference

Conference2008 IEEE 67th Vehicular Technology Conference-Spring, VTC
CountrySingapore
CityMarina Bay
Period11/05/0814/05/08

    Fingerprint

Keywords

  • Cyclic delay diversity (CDD)
  • Multiuser scheduling
  • OFDMA
  • Probability distribution

Cite this

Liu, J., She, X., Chen, L., Taoka, H., & Higuchi, K. (2008). Multi-degree adaptive cyclic delay diversity with multi-user scheduling. In 2008 IEEE 67th Vehicular Technology Conference-Spring, VTC (pp. 1181-1185). [4525806] (IEEE Vehicular Technology Conference). https://doi.org/10.1109/VETECS.2008.250