Capacity analysis of an ARQ scheme for multimedia DS-CDMA systems

Author

de Carvalho, V.R. ; de Almeida, C.

Author_Institution

Dept. de Comunicacoes, Univ. Estadual de Campinas, Sao Paulo, Brazil

Volume

147

Issue

4

fYear

2000

fDate

8/1/2000 12:00:00 AM

Firstpage

201

Lastpage

204

Abstract

A multimedia DS-CDMA system using an ARQ reverse link for data transmission is proposed and analysed. The system capacity is evaluated for several error-detecting codes (EDCs) such as the Hamming codes, the Golay code, the extended Golay code and two kinds of BCH codes. A simple new model based on the asymptotic gain for block and convolutional codes is proposed. Using this asymptotic gain model, analytical expressions for the system capacity are derived, which makes the system capacity evaluation easier and faster. The proposed system allows a greater number of data users by using more powerful block EDCs, instead of the Hamming class. The convolutional code efficiency in this system is also discussed

Keywords

BCH codes; Golay codes; Hamming codes; automatic repeat request; block codes; cellular radio; channel capacity; code division multiple access; convolutional codes; error detection codes; multimedia communication; ARQ reverse link; ARQ scheme; BCH codes; DS-CDMA systems; Golay code; Hamming codes; IS-95 system; asymptotic gain model; block codes; capacity analysis; cellular radio; convolutional codes; data transmission; error-detecting codes; extended Golay code; multimedia systems; system capacity evaluation;

fLanguage

English

Journal_Title

Communications, IEE Proceedings-

Publisher

iet

ISSN

1350-2425

Type

jour

DOI

10.1049/ip-com:20000574

Filename

868137