Title :
System performance analysis with error-controlled data in a voice/data DS-CDMA system
Author :
Lee, Chiho ; Lee, Hokyoung ; Kim, Kiseon
Author_Institution :
Dept. of Inf. & Commun., K-JIST, Kwangju, South Korea
Abstract :
In this paper, we analyze the effect of adopting an ARQ protocol in a voice/data DS-CDMA system. Basically, we consider the IS-95 type reverse link DS-CDMA system which supports two kinds of services, traditional voice and data services. This system includes a 1/3 rate convolutional code for FEC and shortened binary CRC codes for ARQ. First, we find the optimum ARQ code rate which maximizes the number of concurrent users. Average packet transmission time and the normalized system throughput are analyzed for various ARQ protocols. The analysis results show that the number of concurrent users is maximized when the ARQ code rate is about 0.935 and the total system throughput is optimized when the ARQ code rate is about 0.97
Keywords :
automatic repeat request; binary codes; cellular radio; code division multiple access; convolutional codes; forward error correction; integrated voice/data communication; multimedia communication; packet radio networks; protocols; spread spectrum communication; 1/3 rate convolutional code; ARQ protocol; FEC; IS-95 type reverse link; average packet transmission time; concurrent users; error-controlled data; normalized system throughput; optimum ARQ code rate; shortened binary CRC codes; system performance analysis; total system throughput; voice/data DS-CDMA system; Automatic repeat request; Convolutional codes; Data analysis; Error analysis; Multiaccess communication; Performance analysis; Protocols; Speech analysis; System performance; Throughput;
Conference_Titel :
Vehicular Technology Conference, 1999. VTC 1999 - Fall. IEEE VTS 50th
Conference_Location :
Amsterdam
Print_ISBN :
0-7803-5435-4
DOI :
10.1109/VETECF.1999.797153
