Adaptive selection combining for soft handover in OVSF W-CDMA systems

Author

Lin, Kuo-Jen ; Tseng, Yu-Chee

Author_Institution

Dept. of Electr. Eng., Chung Hua Univ., Hsin-Chu, Taiwan

Volume

8

Issue

11

fYear

2004

Firstpage

656

Lastpage

658

Abstract

In W-CDMA, soft handover is supported at cell boundaries to maintain communication quality. The maximal ratio combining (MRC) and generalized selection combining (GSC) , are two possible approaches. However, soft handover is resource-intensive. In this letter, we propose an adaptive selection combining (ASC) scheme that can switch flexibly between MRC and GSC so as to take care of both channel loading and communication quality. The signal-to-interference-and-noise ratio (SINR) is kept as high as that of MRC while the blocking probability can remain at about the same level as that of GSC.

Keywords

broadband networks; cellular radio; code division multiple access; diversity reception; probability; W-CDMA systems; adaptive selection combining; blocking probability; channel loading; communication quality; generalized selection combining; maximal ratio combining; orthogonal variable spreading factor; signal-to-interference-and-noise ratio; soft handover; Base stations; Bit error rate; Communication system software; Diversity reception; Educational institutions; Embedded software; Handheld computers; Multiaccess communication; Signal to noise ratio; Switches; 65; Active set; OVSF; W-CDMA; orthogonal variable spreading factor; selection combining; soft handover;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2004.837626

Filename

1359883