An optimum combining and concatenated-RAKE for dual-antenna mobile terminals in UMTS

Author

Tantikovit, S. ; Wang, M.Z.

Author_Institution

Dept. of Electr. & Inf. Eng., Hong Kong Polytech. Univ., Kowloon, China

Volume

6

Issue

6

fYear

2002

fDate

6/1/2002 12:00:00 AM

Firstpage

231

Lastpage

233

Abstract

The downlink of UMTS employs variable spreading factor and multicode to support variable data rate transmissions. In multicode and low spreading factor scenarios, interpath interference (IPI) among code channels is a principle factor that needs to be taken into consideration in system design. For example, the RAKE receiver with conventional maximum-ratio-combining suffers greatly from the presence of IPI. We present a new receiver structure that effectively incorporates an optimum combining scheme and dual-antenna diversity to enhance system performance.

Keywords

Rayleigh channels; adaptive antenna arrays; cellular radio; diversity reception; interference suppression; multipath channels; radio links; radio receivers; radiofrequency interference; spread spectrum communication; telecommunication terminals; RAKE receiver; UMTS downlink; adaptive antenna array; code channels; concatenated-RAKE; dual-antenna diversity; dual-antenna mobile terminals; four-path Rayleigh fading channel; interference suppression; interpath interference; low spreading factor; maximum ratio combining; multicode; optimum combining; system performance; variable data rate transmission; variable spreading factor; 3G mobile communication; Antenna arrays; Degradation; Diversity reception; Downlink; Fading; Fingers; Multipath channels; RAKE receivers; Radiofrequency interference;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2002.1010864

Filename

1010864